ska-low-cbf-configurescan

LOWCBF configurescan 0.5

Example JSON (2025-09-10: added RFI flagging thresholds)

{
    "interface": "https://schema.skao.int/ska-low-cbf-configurescan/0.5",
    "lowcbf": {
        "stations": {
            "stns": [
                [1, 1],
                [2, 1],
                [3, 1],
                [4, 1],
                [5, 1],
                [6, 1]
            ],
            "stn_beams": [{
                "beam_id": 1,
                "freq_ids": [400],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1"
            }]
        },
        "vis": {
            "firmware": "https://example.com/ska-low-cbf-fw-corr.tar.gz",
            "sps_rfi_threshold_db": -60.0,
            "stn_beams": [{
                "stn_beam_id": 1,
                "host": [
                    [0, "192.168.1.0"]
                ],
                "port": [
                    [0, 9000, 1]
                ],
                "mac": [
                    [0, "02-03-04-0a-0b-0c"]
                ],
                "integration_ms": 849
            }]
        },
        "timing_beams": {
            "firmware": "https://example.com/ska-low-cbf-fw-pst.tar.gz",
            "sps_rfi_threshold_db": -60.0,
            "beams": [{
                "pst_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        },
        "search_beams": {
            "firmware": "https://example.com/ska-low-cbf-fw-pss.tar.gz",
            "sps_rfi_threshold_db": -60.0,
            "beams": [{
                "pss_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        },
        "coarse_zooms": {
            "firmware": "https://example.com/ska-low-cbf-fw-corr.tar.gz",
            "sps_rfi_threshold_db": -60.0,
            "stn_beams": [{
                "zoom_window_id": 1,
                "zoom_resolution_hz": 227,
                "centre_frequency_hz": 312500000,
                "zoom_bandwidth_hz": 3000,
                "stn_beam_id": 1,
                "host": [
                    [0, "192.168.1.01"]
                ],
                "port": [
                    [0, 10000, 1]
                ],
                "mac": [
                    [0, "02-03-04-0a-0b-0c"]
                ],
                "integration_ms": 849
            }]
        }
    }
}

https://schema.skao.int/ska-low-cbf-configurescan/0.5
type	object
properties
interface	URI of JSON schema for this command’s JSON payload.
	type	string
lowcbf	LOWCBF configuration for scan
	LOWCBF_subarray_configurescan_0.5
additionalProperties	True

LOWCBF_subarray_configurescan_0.5

Correlator and Beamformer specific parameters. This section contains the parameters relevant only for CBF sub-system. This section is forwarded only to CBF subelement.

type	object
properties
stations	Subarray Stations and station beam input descriptions
	Subarray_stations_and_station_beams_0.5
timing_beams	PST beam outputs descriptions
	outer_0.5
search_beams	outer 0.5
	PSS beam outputs descriptions
	type	object
	properties
	beams	inner
		type	array
		items	PSS_beams_description_0.5
	firmware	PSS firmware name
		type	string
	sps_rfi_threshold_db	SPS RFI flagging aliasing power threshold. This parameter specifies how much aliasing power is tolerated before Low CBF will flag samples as RFI (i.e. not usable because of Radio Frequency Interference). The value is specified in decibels relative to an SPS channel with no RFI-flagged samples, and therefore must be a negative or zero value. A setting of zero means the output will never be flagged as RFI, no matter how badly it may be distorted. -100 is the most sensitive possible value. The “aliasing power” here is a result of samples that have been flagged as RFI by SPS. These are treated as zero by Low CBF, distorting CBF filterbank’s response. See also requirements SKAO-CSP_Low_CBF_REQ-280 and SKAO_IF-LOW_CBF_SPS-18.
		type	number
	additionalProperties	True
vis	Visibilities description 0.5
	Visibility output descriptions
	type	object
	properties
	firmware	Firmware to use
		type	string
	fsp	FSP 0.5
		FSPs used for correlation
		type	object
		properties
		firmware	Firmware name
			type	string
		fsp_ids	List of IDs (integer)
			type	array
			items	type	integer
		additionalProperties	True
	sps_rfi_threshold_db	SPS RFI flagging aliasing power threshold. This parameter specifies how much aliasing power is tolerated before Low CBF will flag samples as RFI (i.e. not usable because of Radio Frequency Interference). The value is specified in decibels relative to an SPS channel with no RFI-flagged samples, and therefore must be a negative or zero value. A setting of zero means the output will never be flagged as RFI, no matter how badly it may be distorted. -100 is the most sensitive possible value. The “aliasing power” here is a result of samples that have been flagged as RFI by SPS. These are treated as zero by Low CBF, distorting CBF filterbank’s response. See also requirements SKAO-CSP_Low_CBF_REQ-280 and SKAO_IF-LOW_CBF_SPS-18.
		type	number
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_to_correlate_0.5
	additionalProperties	True
coarse_zooms	Coarse zoom description 0.5
	Zoom visibility output descriptions, res>226Hz
	type	object
	properties
	firmware	Firmware for zoom correlation
		type	string
	sps_rfi_threshold_db	SPS RFI flagging aliasing power threshold. This parameter specifies how much aliasing power is tolerated before Low CBF will flag samples as RFI (i.e. not usable because of Radio Frequency Interference). The value is specified in decibels relative to an SPS channel with no RFI-flagged samples, and therefore must be a negative or zero value. A setting of zero means the output will never be flagged as RFI, no matter how badly it may be distorted. -100 is the most sensitive possible value. The “aliasing power” here is a result of samples that have been flagged as RFI by SPS. These are treated as zero by Low CBF, distorting CBF filterbank’s response. See also requirements SKAO-CSP_Low_CBF_REQ-280 and SKAO_IF-LOW_CBF_SPS-18.
		type	number
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_for_zoom_correlate_0.5
	additionalProperties	True
additionalProperties	True

Subarray_stations_and_station_beams_0.5

Station and station beams parameters

type	object
properties
stns	type	array
	items	type	array
		items	type	integer
stn_beams	type	array
	items	Subarray station beams 0.5
		type	object
		properties
		beam_id	station beam id
			type	integer
		freq_ids	list of station beam frequency ids
			type	array
			items	type	integer
		delay_poly	URL
			type	string
		additionalProperties	True
additionalProperties	True

outer_0.5

PST Outer

type	object
properties
beams	inner
	type	array
	items	PST_beams_description_0.5
firmware	PST firmware name
	type	string
sps_rfi_threshold_db	SPS RFI flagging aliasing power threshold. This parameter specifies how much aliasing power is tolerated before Low CBF will flag samples as RFI (i.e. not usable because of Radio Frequency Interference). The value is specified in decibels relative to an SPS channel with no RFI-flagged samples, and therefore must be a negative or zero value. A setting of zero means the output will never be flagged as RFI, no matter how badly it may be distorted. -100 is the most sensitive possible value. The “aliasing power” here is a result of samples that have been flagged as RFI by SPS. These are treated as zero by Low CBF, distorting CBF filterbank’s response. See also requirements SKAO-CSP_Low_CBF_REQ-280 and SKAO_IF-LOW_CBF_SPS-18.
	type	number
additionalProperties	True

PST_beams_description_0.5

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pst_beam_id	PST beam ID
	type	integer
field	Sky direction
	field description
	anyOf	ICRS sky direction 0.5
		A sky direction defined in the ICRS reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “icrs” for a sky direction defined in the ICRS reference frame. Validation is case-insensitive.
			type	string
		attrs	0.5*
			Attributes for an ICRS sky direction
			type	object
			properties
			c1	The longitude coordinate, specifying degrees right ascension in the ICRS reference frame. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The latitude coordinate, specifying degrees declination in the ICRS reference frame. Value must be in the range -90 <= c2 <= 90.
				type	number
			pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
				type	number
				default	2000.0
			parallax	The parallax in seconds of arc.
				type	number
				default	0.0
			radial_velocity	Radial velocity along the line of sight in m/s.
				type	number
				default	0.0
			additionalProperties	True
		additionalProperties	True
		AltAz sky direction 0.5
		A sky direction defined in the AltAz reference frame
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Fixed as “altaz” for a sky direction defined in the AltAz reference frame. Validation is case-insensitive.
			type	string
		attrs	0.5*
			Allowed attributes for an AltAz sky direction
			type	object
			properties
			c1	The azimuth coordinate in degrees. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The elevation coordinate in degrees. Value must be in the range 0 <= c2 <= 90.
				type	number
			additionalProperties	True
		additionalProperties	True
		Galactic sky direction 0.5
		A sky direction defined in the Galactic reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “galactic” for a sky direction defined in the Galactic reference frame. Validation is case-insensitive.
			type	string
		attrs	0.5*
			Attributes for a Galactic sky direction
			type	object
properties
c1	The longitude coordinate, specifying degrees right ascension in the Galactic reference frame. Value must be in the range 0 <= c1 < 360.
	type	number
c2	The latitude coordinate, specifying degrees declination in the Galactic reference frame. Value must be in the range -90 <= c2 <= 90.
	type	number
pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
	type	number
	default	2000.0
parallax	The parallax in seconds of arc.
	type	number
	default	0.0
radial_velocity	Radial velocity along the line of sight in m/s.
	type	number
	default	0.0
additionalProperties	True
additionalProperties	True
Special sky direction 0.5
A sky direction whose coordinates are defined in Katpoint.
type	object
properties
target_name	A name for the target. This should be the name of a resolvable entity in Katpoint, for example, the name of a solar system body.
	type	string
reference_frame	Must be “special” for a catalogue sky direction. Validation is case-insensitive.
	type	string
additionalProperties	True
Two-Line Element sky direction 0.5
A sky direction defined by a Two-Line Element (TLE) set.
type	object
properties
target_name	A name for the target. For a TLE sky direction, this could be the name of a satellite in orbit.
	type	string
reference_frame	Must be “tle” for a sky direction defined in the TLE reference frame. Validation is case-insensitive.
	type	string
attrs	0.5*
	Attributes for a TLE sky direction.
	type	object
	properties
	line1	First line of a two-line element (TLE) sky direction.
		type	string
	line2	Second line of a two-line element (TLE) sky direction.
		type	string
	additionalProperties	True
additionalProperties	True
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 0.5
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

PSS_beams_description_0.5

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pss_beam_id	PSS beam ID
	type	integer
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 0.5
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

Station_beams_to_correlate_0.5

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True

Station_beams_for_zoom_correlate_0.5

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
zoom_window_id	Zoom window ID
	type	integer
zoom_resolution_hz	Resolution bandwidth of zoom (Hz)
	type	integer
centre_frequency_hz	Centre of zoom band (Hz)
	type	integer
zoom_bandwidth_hz	Bandwidth of zoom (Hz)
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True

LOWCBF configurescan 0.4

Example JSON (2025-06-12: defined zoom visibilities, removed FSPs)

{
    "interface": "https://schema.skao.int/ska-low-cbf-configurescan/0.4",
    "lowcbf": {
        "stations": {
            "stns": [
                [1, 1],
                [2, 1],
                [3, 1],
                [4, 1],
                [5, 1],
                [6, 1]
            ],
            "stn_beams": [{
                "beam_id": 1,
                "freq_ids": [400],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1"
            }]
        },
        "vis": {
            "firmware": "vis",
            "stn_beams": [{
                "stn_beam_id": 1,
                "host": [
                    [0, "192.168.1.0"]
                ],
                "port": [
                    [0, 9000, 1]
                ],
                "mac": [
                    [0, "02-03-04-0a-0b-0c"]
                ],
                "integration_ms": 849
            }]
        },
        "timing_beams": {
            "firmware": "pst",
            "beams": [{
                "pst_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        },
        "search_beams": {
            "firmware": "pss",
            "beams": [{
                "pss_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        },
        "coarse_zooms": {
            "firmware": "vis",
            "stn_beams": [{
                "zoom_window_id": 1,
                "zoom_resolution_hz": 227,
                "centre_frequency_hz": 312500000,
                "zoom_bandwidth_hz": 3000,
                "stn_beam_id": 1,
                "host": [
                    [0, "192.168.1.01"]
                ],
                "port": [
                    [0, 10000, 1]
                ],
                "mac": [
                    [0, "02-03-04-0a-0b-0c"]
                ],
                "integration_ms": 849
            }]
        }
    }
}

https://schema.skao.int/ska-low-cbf-configurescan/0.4
type	object
properties
interface	URI of JSON schema for this command’s JSON payload.
	type	string
lowcbf	LOWCBF configuration for scan
	LOWCBF_subarray_configurescan_0.4
additionalProperties	True

LOWCBF_subarray_configurescan_0.4

Correlator and Beamformer specific parameters. This section contains the parameters relevant only for CBF sub-system. This section is forwarded only to CBF subelement.

type	object
properties
stations	Subarray Stations and station beam input descriptions
	Subarray_stations_and_station_beams_0.4
timing_beams	PST beam outputs descriptions
	outer_0.4
search_beams	outer 0.4
	PSS beam outputs descriptions
	type	object
	properties
	beams	inner
		type	array
		items	PSS_beams_description_0.4
	firmware	PSS firmware name
		type	string
	additionalProperties	True
vis	Visibilities description 0.4
	Visibility output descriptions
	type	object
	properties
	firmware	Firmware to use
		type	string
	fsp	FSP 0.4
		FSPs used for correlation
		type	object
		properties
		firmware	Firmware name
			type	string
		fsp_ids	List of IDs (integer)
			type	array
			items	type	integer
		additionalProperties	True
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_to_correlate_0.4
	additionalProperties	True
coarse_zooms	Coarse zoom description 0.4
	Zoom visibility output descriptions, res>226Hz
	type	object
	properties
	firmware	Firmware for zoom correlation
		type	string
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_for_zoom_correlate_0.4
	additionalProperties	True
additionalProperties	True

Subarray_stations_and_station_beams_0.4

Station and station beams parameters

type	object
properties
stns	type	array
	items	type	array
		items	type	integer
stn_beams	type	array
	items	Subarray station beams 0.4
		type	object
		properties
		beam_id	station beam id
			type	integer
		freq_ids	list of station beam frequency ids
			type	array
			items	type	integer
		delay_poly	URL
			type	string
		additionalProperties	True
additionalProperties	True

outer_0.4

PST Outer

type	object
properties
beams	inner
	type	array
	items	PST_beams_description_0.4
firmware	PST firmware name
	type	string
additionalProperties	True

PST_beams_description_0.4

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pst_beam_id	PST beam ID
	type	integer
field	Sky direction
	field description
	anyOf	ICRS sky direction 0.4
		A sky direction defined in the ICRS reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “icrs” for a sky direction defined in the ICRS reference frame. Validation is case-insensitive.
			type	string
		attrs	0.4*
			Attributes for an ICRS sky direction
			type	object
			properties
			c1	The longitude coordinate, specifying degrees right ascension in the ICRS reference frame. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The latitude coordinate, specifying degrees declination in the ICRS reference frame. Value must be in the range -90 <= c2 <= 90.
				type	number
			pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
				type	number
				default	2000.0
			parallax	The parallax in seconds of arc.
				type	number
				default	0.0
			radial_velocity	Radial velocity along the line of sight in m/s.
				type	number
				default	0.0
			additionalProperties	True
		additionalProperties	True
		AltAz sky direction 0.4
		A sky direction defined in the AltAz reference frame
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Fixed as “altaz” for a sky direction defined in the AltAz reference frame. Validation is case-insensitive.
			type	string
		attrs	0.4*
			Allowed attributes for an AltAz sky direction
			type	object
			properties
			c1	The azimuth coordinate in degrees. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The elevation coordinate in degrees. Value must be in the range 0 <= c2 <= 90.
				type	number
			additionalProperties	True
		additionalProperties	True
		Galactic sky direction 0.4
		A sky direction defined in the Galactic reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “galactic” for a sky direction defined in the Galactic reference frame. Validation is case-insensitive.
			type	string
		attrs	0.4*
			Attributes for a Galactic sky direction
			type	object
properties
c1	The longitude coordinate, specifying degrees right ascension in the Galactic reference frame. Value must be in the range 0 <= c1 < 360.
	type	number
c2	The latitude coordinate, specifying degrees declination in the Galactic reference frame. Value must be in the range -90 <= c2 <= 90.
	type	number
pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
	type	number
	default	2000.0
parallax	The parallax in seconds of arc.
	type	number
	default	0.0
radial_velocity	Radial velocity along the line of sight in m/s.
	type	number
	default	0.0
additionalProperties	True
additionalProperties	True
Special sky direction 0.4
A sky direction whose coordinates are defined in Katpoint.
type	object
properties
target_name	A name for the target. This should be the name of a resolvable entity in Katpoint, for example, the name of a solar system body.
	type	string
reference_frame	Must be “special” for a catalogue sky direction. Validation is case-insensitive.
	type	string
additionalProperties	True
Two-Line Element sky direction 0.4
A sky direction defined by a Two-Line Element (TLE) set.
type	object
properties
target_name	A name for the target. For a TLE sky direction, this could be the name of a satellite in orbit.
	type	string
reference_frame	Must be “tle” for a sky direction defined in the TLE reference frame. Validation is case-insensitive.
	type	string
attrs	0.4*
	Attributes for a TLE sky direction.
	type	object
	properties
	line1	First line of a two-line element (TLE) sky direction.
		type	string
	line2	Second line of a two-line element (TLE) sky direction.
		type	string
	additionalProperties	True
additionalProperties	True
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 0.4
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

PSS_beams_description_0.4

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pss_beam_id	PSS beam ID
	type	integer
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 0.4
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

Station_beams_to_correlate_0.4

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True

Station_beams_for_zoom_correlate_0.4

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
zoom_window_id	Zoom window ID
	type	integer
zoom_resolution_hz	Resolution bandwidth of zoom (Hz)
	type	integer
centre_frequency_hz	Centre of zoom band (Hz)
	type	integer
zoom_bandwidth_hz	Bandwidth of zoom (Hz)
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True

LOWCBF configurescan 0.3

Example JSON (2024-07-02: defined PSS search beams)

{
    "interface": "https://schema.skao.int/ska-low-cbf-configurescan/0.3",
    "lowcbf": {
        "stations": {
            "stns": [
                [1, 1],
                [2, 1],
                [3, 1],
                [4, 1],
                [5, 1],
                [6, 1]
            ],
            "stn_beams": [{
                "beam_id": 1,
                "freq_ids": [400],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1"
            }]
        },
        "vis": {
            "fsp": {
                "firmware": "vis",
                "fsp_ids": [1]
            },
            "stn_beams": [{
                "stn_beam_id": 1,
                "host": [
                    [0, "192.168.1.00"]
                ],
                "port": [
                    [0, 9000, 1]
                ],
                "mac": [
                    [0, "02-03-04-0a-0b-0c"]
                ],
                "integration_ms": 849
            }]
        },
        "timing_beams": {
            "fsp": {
                "firmware": "pst",
                "fsp_ids": [2]
            },
            "beams": [{
                "pst_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        },
        "search_beams": {
            "fsp": {
                "firmware": "pss",
                "fsp_ids": [3]
            },
            "beams": [{
                "pss_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        }
    }
}

https://schema.skao.int/ska-low-cbf-configurescan/0.3
type	object
properties
interface	URI of JSON schema for this command’s JSON payload.
	type	string
lowcbf	LOWCBF configuration for scan
	LOWCBF_subarray_configurescan_0.3
additionalProperties	True

LOWCBF_subarray_configurescan_0.3

Correlator and Beamformer specific parameters. This section contains the parameters relevant only for CBF sub-system. This section is forwarded only to CBF subelement.

type	object
properties
stations	Subarray Stations and station beam input descriptions
	Subarray_stations_and_station_beams_0.3
timing_beams	PST beam outputs descriptions
	outer_0.3
search_beams	outer 0.3
	PSS beam outputs descriptions
	type	object
	properties
	beams	inner
		type	array
		items	PSS_beams_description_0.3
	fsp	FSP 0.3
		FSPs used by PST
		type	object
		properties
		firmware	Firmware name
			type	string
		fsp_ids	List of IDs (integer)
			type	array
			items	type	integer
		additionalProperties	True
	additionalProperties	True
vis	Visibilities description 0.3
	Visibility output descriptions
	type	object
	properties
	fsp	FSP 0.3
		FSPs used for correlation
		type	object
		properties
		firmware	Firmware name
			type	string
		fsp_ids	List of IDs (integer)
			type	array
			items	type	integer
		additionalProperties	True
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_to_correlate_0.3
	additionalProperties	True
zooms	placeholder zoom visibility output descriptions
	type	string
additionalProperties	True

Subarray_stations_and_station_beams_0.3

Station and station beams parameters

type	object
properties
stns	type	array
	items	type	array
		items	type	integer
stn_beams	type	array
	items	Subarray station beams 0.3
		type	object
		properties
		beam_id	station beam id
			type	integer
		freq_ids	list of station beam frequency ids
			type	array
			items	type	integer
		delay_poly	URL
			type	string
		additionalProperties	True
additionalProperties	True

outer_0.3

PST Outer

type	object
properties
beams	inner
	type	array
	items	PST_beams_description_0.3
fsp	FSP 0.3
	FSPs used by PST
	type	object
	properties
	firmware	Firmware name
		type	string
	fsp_ids	List of IDs (integer)
		type	array
		items	type	integer
	additionalProperties	True
additionalProperties	True

PST_beams_description_0.3

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pst_beam_id	PST beam ID
	type	integer
field	Sky direction
	field description
	anyOf	ICRS sky direction 0.3
		A sky direction defined in the ICRS reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “icrs” for a sky direction defined in the ICRS reference frame. Validation is case-insensitive.
			type	string
		attrs	0.3*
			Attributes for an ICRS sky direction
			type	object
			properties
			c1	The longitude coordinate, specifying degrees right ascension in the ICRS reference frame. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The latitude coordinate, specifying degrees declination in the ICRS reference frame. Value must be in the range -90 <= c2 <= 90.
				type	number
			pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
				type	number
				default	2000.0
			parallax	The parallax in seconds of arc.
				type	number
				default	0.0
			radial_velocity	Radial velocity along the line of sight in m/s.
				type	number
				default	0.0
			additionalProperties	True
		additionalProperties	True
		AltAz sky direction 0.3
		A sky direction defined in the AltAz reference frame
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Fixed as “altaz” for a sky direction defined in the AltAz reference frame. Validation is case-insensitive.
			type	string
		attrs	0.3*
			Allowed attributes for an AltAz sky direction
			type	object
			properties
			c1	The azimuth coordinate in degrees. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The elevation coordinate in degrees. Value must be in the range 0 <= c2 <= 90.
				type	number
			additionalProperties	True
		additionalProperties	True
		Galactic sky direction 0.3
		A sky direction defined in the Galactic reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “galactic” for a sky direction defined in the Galactic reference frame. Validation is case-insensitive.
			type	string
		attrs	0.3*
			Attributes for a Galactic sky direction
			type	object
properties
c1	The longitude coordinate, specifying degrees right ascension in the Galactic reference frame. Value must be in the range 0 <= c1 < 360.
	type	number
c2	The latitude coordinate, specifying degrees declination in the Galactic reference frame. Value must be in the range -90 <= c2 <= 90.
	type	number
pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
	type	number
	default	2000.0
parallax	The parallax in seconds of arc.
	type	number
	default	0.0
radial_velocity	Radial velocity along the line of sight in m/s.
	type	number
	default	0.0
additionalProperties	True
additionalProperties	True
Special sky direction 0.3
A sky direction whose coordinates are defined in Katpoint.
type	object
properties
target_name	A name for the target. This should be the name of a resolvable entity in Katpoint, for example, the name of a solar system body.
	type	string
reference_frame	Must be “special” for a catalogue sky direction. Validation is case-insensitive.
	type	string
additionalProperties	True
Two-Line Element sky direction 0.3
A sky direction defined by a Two-Line Element (TLE) set.
type	object
properties
target_name	A name for the target. For a TLE sky direction, this could be the name of a satellite in orbit.
	type	string
reference_frame	Must be “tle” for a sky direction defined in the TLE reference frame. Validation is case-insensitive.
	type	string
attrs	0.3*
	Attributes for a TLE sky direction.
	type	object
	properties
	line1	First line of a two-line element (TLE) sky direction.
		type	string
	line2	Second line of a two-line element (TLE) sky direction.
		type	string
	additionalProperties	True
additionalProperties	True
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 0.3
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

PSS_beams_description_0.3

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pss_beam_id	PSS beam ID
	type	integer
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 0.3
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

Station_beams_to_correlate_0.3

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True

LOWCBF configurescan 1.0

Example (Low CBF Configuration JSON including Nakshatra work)

{
    "interface": "https://schema.skao.int/ska-low-cbf-configurescan/1.0",
    "lowcbf": {
        "stations": {
            "stns": [
                [1, 1],
                [2, 1],
                [3, 1],
                [4, 1],
                [5, 1],
                [6, 1]
            ],
            "stn_beams": [{
                "stn_beam_id": 1,
                "freq_ids": [400],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1"
            }]
        },
        "vis": {
            "fsp": {
                "function_mode": "vis",
                "fsp_ids": [1]
            },
            "stn_beams": [{
                "stn_beam_id": 1,
                "host": [
                    [0, "192.168.1.00"]
                ],
                "port": [
                    [0, 9000, 1]
                ],
                "mac": [
                    [0, "02-03-04-0a-0b-0c"]
                ],
                "integration_ms": 849
            }]
        },
        "timing_beams": {
            "fsp": {
                "function_mode": "pst",
                "fsp_ids": [2]
            },
            "beams": [{
                "pst_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        }
    }
}

https://schema.skao.int/ska-low-cbf-configurescan/1.0
type	object
properties
interface	URI of JSON schema for this command’s JSON payload.
	type	string
lowcbf	LOWCBF configuration for scan
	LOWCBF_subarray_configurescan_1.0
additionalProperties	True

LOWCBF_subarray_configurescan_1.0

Correlator and Beamformer specific parameters. This section contains the parameters relevant only for CBF sub-system. This section is forwarded only to CBF subelement.

type	object
properties
stations	Subarray Stations and station beam input descriptions
	Subarray_stations_and_station_beams_1.0
timing_beams	PST beam outputs descriptions
	outer_1.0
search_beams	PSS beam outputs descriptions
	type	string
vis	Visibilities description 1.0
	Visibility output descriptions
	type	object
	properties
	fsp	FSP 1.0
		FSPs used for correlation
		type	object
		properties
		function_mode	Firmware name
			type	string
		fsp_ids	List of IDs (integer)
			type	array
			items	type	integer
		additionalProperties	True
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_to_correlate_1.0
	additionalProperties	True
zooms	placeholder zoom visibility output descriptions
	type	string
additionalProperties	True

Subarray_stations_and_station_beams_1.0

Station and station beams parameters

type	object
properties
stns	type	array
	items	type	array
		items	type	integer
stn_beams	type	array
	items	Subarray station beams 1.0
		type	object
		properties
		stn_beam_id	station beam id
			type	integer
		freq_ids	list of station beam frequency ids
			type	array
			items	type	integer
		delay_poly	URL
			type	string
		additionalProperties	True
additionalProperties	True

outer_1.0

PST Outer

type	object
properties
beams	inner
	type	array
	items	PST_beams_description_1.0
fsp	FSP 1.0
	FSPs used by PST
	type	object
	properties
	function_mode	Firmware name
		type	string
	fsp_ids	List of IDs (integer)
		type	array
		items	type	integer
	additionalProperties	True
additionalProperties	True

PST_beams_description_1.0

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pst_beam_id	PST beam ID
	type	integer
field	Sky direction
	field description
	anyOf	ICRS sky direction 1.0
		A sky direction defined in the ICRS reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “icrs” for a sky direction defined in the ICRS reference frame. Validation is case-insensitive.
			type	string
		attrs	1.0*
			Attributes for an ICRS sky direction
			type	object
			properties
			c1	The longitude coordinate, specifying degrees right ascension in the ICRS reference frame. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The latitude coordinate, specifying degrees declination in the ICRS reference frame. Value must be in the range -90 <= c2 <= 90.
				type	number
			pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
				type	number
				default	2000.0
			parallax	The parallax in seconds of arc.
				type	number
				default	0.0
			radial_velocity	Radial velocity along the line of sight in m/s.
				type	number
				default	0.0
			additionalProperties	True
		additionalProperties	True
		AltAz sky direction 1.0
		A sky direction defined in the AltAz reference frame
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Fixed as “altaz” for a sky direction defined in the AltAz reference frame. Validation is case-insensitive.
			type	string
		attrs	1.0*
			Allowed attributes for an AltAz sky direction
			type	object
			properties
			c1	The azimuth coordinate in degrees. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The elevation coordinate in degrees. Value must be in the range 0 <= c2 <= 90.
				type	number
			additionalProperties	True
		additionalProperties	True
		Galactic sky direction 1.0
		A sky direction defined in the Galactic reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “galactic” for a sky direction defined in the Galactic reference frame. Validation is case-insensitive.
			type	string
		attrs	1.0*
			Attributes for a Galactic sky direction
			type	object
properties
c1	The longitude coordinate, specifying degrees right ascension in the Galactic reference frame. Value must be in the range 0 <= c1 < 360.
	type	number
c2	The latitude coordinate, specifying degrees declination in the Galactic reference frame. Value must be in the range -90 <= c2 <= 90.
	type	number
pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
	type	number
	default	2000.0
parallax	The parallax in seconds of arc.
	type	number
	default	0.0
radial_velocity	Radial velocity along the line of sight in m/s.
	type	number
	default	0.0
additionalProperties	True
additionalProperties	True
Special sky direction 1.0
A sky direction whose coordinates are defined in Katpoint.
type	object
properties
target_name	A name for the target. This should be the name of a resolvable entity in Katpoint, for example, the name of a solar system body.
	type	string
reference_frame	Must be “special” for a catalogue sky direction. Validation is case-insensitive.
	type	string
additionalProperties	True
Two-Line Element sky direction 1.0
A sky direction defined by a Two-Line Element (TLE) set.
type	object
properties
target_name	A name for the target. For a TLE sky direction, this could be the name of a satellite in orbit.
	type	string
reference_frame	Must be “tle” for a sky direction defined in the TLE reference frame. Validation is case-insensitive.
	type	string
attrs	1.0*
	Attributes for a TLE sky direction.
	type	object
	properties
	line1	First line of a two-line element (TLE) sky direction.
		type	string
	line2	Second line of a two-line element (TLE) sky direction.
		type	string
	additionalProperties	True
additionalProperties	True
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 1.0
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

Station_beams_to_correlate_1.0

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True

LOWCBF configurescan 0.2

Example JSON (2025-06-12 Added zoom visibilities)

{
    "interface": "https://schema.skao.int/ska-low-cbf-configurescan/0.2",
    "lowcbf": {
        "stations": {
            "stns": [
                [1, 1],
                [2, 1],
                [3, 1],
                [4, 1],
                [5, 1],
                [6, 1]
            ],
            "stn_beams": [{
                "beam_id": 1,
                "freq_ids": [400],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1"
            }]
        },
        "vis": {
            "fsp": {
                "firmware": "vis",
                "fsp_ids": [1]
            },
            "stn_beams": [{
                "stn_beam_id": 1,
                "host": [
                    [0, "192.168.1.00"]
                ],
                "port": [
                    [0, 9000, 1]
                ],
                "mac": [
                    [0, "02-03-04-0a-0b-0c"]
                ],
                "integration_ms": 849
            }]
        },
        "timing_beams": {
            "fsp": {
                "firmware": "pst",
                "fsp_ids": [2]
            },
            "beams": [{
                "pst_beam_id": 1,
                "stn_beam_id": 1,
                "stn_weights": [0.9, 1.0, 1.0, 1.0, 0.9, 1.0],
                "delay_poly": "tango://delays.skao.int/low/stn-beam/1",
                "jones": "tango://jones.skao.int/low/stn-beam/1",
                "destinations": [{
                    "data_host": "10.0.3.2",
                    "data_port": 9000,
                    "start_channel": 0,
                    "num_channels": 24
                }]
            }]
        }
    }
}

https://schema.skao.int/ska-low-cbf-configurescan/0.2
type	object
properties
interface	URI of JSON schema for this command’s JSON payload.
	type	string
lowcbf	LOWCBF configuration for scan
	LOWCBF_subarray_configurescan_0.2
additionalProperties	True

LOWCBF_subarray_configurescan_0.2

Correlator and Beamformer specific parameters. This section contains the parameters relevant only for CBF sub-system. This section is forwarded only to CBF subelement.

type	object
properties
stations	Subarray Stations and station beam input descriptions
	Subarray_stations_and_station_beams_0.2
timing_beams	PST beam outputs descriptions
	outer_0.2
search_beams	PSS beam outputs descriptions
	type	string
vis	Visibilities description 0.2
	Visibility output descriptions
	type	object
	properties
	fsp	FSP 0.2
		FSPs used for correlation
		type	object
		properties
		firmware	Firmware name
			type	string
		fsp_ids	List of IDs (integer)
			type	array
			items	type	integer
		additionalProperties	True
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_to_correlate_0.2
	additionalProperties	True
zooms	placeholder zoom visibility output descriptions
	type	string
additionalProperties	True

Subarray_stations_and_station_beams_0.2

Station and station beams parameters

type	object
properties
stns	type	array
	items	type	array
		items	type	integer
stn_beams	type	array
	items	Subarray station beams 0.2
		type	object
		properties
		beam_id	station beam id
			type	integer
		freq_ids	list of station beam frequency ids
			type	array
			items	type	integer
		delay_poly	URL
			type	string
		additionalProperties	True
additionalProperties	True

outer_0.2

PST Outer

type	object
properties
beams	inner
	type	array
	items	PST_beams_description_0.2
fsp	FSP 0.2
	FSPs used by PST
	type	object
	properties
	firmware	Firmware name
		type	string
	fsp_ids	List of IDs (integer)
		type	array
		items	type	integer
	additionalProperties	True
additionalProperties	True

PST_beams_description_0.2

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pst_beam_id	PST beam ID
	type	integer
field	Sky direction
	field description
	anyOf	ICRS sky direction 0.2
		A sky direction defined in the ICRS reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “icrs” for a sky direction defined in the ICRS reference frame. Validation is case-insensitive.
			type	string
		attrs	0.2*
			Attributes for an ICRS sky direction
			type	object
			properties
			c1	The longitude coordinate, specifying degrees right ascension in the ICRS reference frame. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The latitude coordinate, specifying degrees declination in the ICRS reference frame. Value must be in the range -90 <= c2 <= 90.
				type	number
			pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
				type	number
				default	2000.0
			parallax	The parallax in seconds of arc.
				type	number
				default	0.0
			radial_velocity	Radial velocity along the line of sight in m/s.
				type	number
				default	0.0
			additionalProperties	True
		additionalProperties	True
		AltAz sky direction 0.2
		A sky direction defined in the AltAz reference frame
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Fixed as “altaz” for a sky direction defined in the AltAz reference frame. Validation is case-insensitive.
			type	string
		attrs	0.2*
			Allowed attributes for an AltAz sky direction
			type	object
			properties
			c1	The azimuth coordinate in degrees. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The elevation coordinate in degrees. Value must be in the range 0 <= c2 <= 90.
				type	number
			additionalProperties	True
		additionalProperties	True
		Galactic sky direction 0.2
		A sky direction defined in the Galactic reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “galactic” for a sky direction defined in the Galactic reference frame. Validation is case-insensitive.
			type	string
		attrs	0.2*
			Attributes for a Galactic sky direction
			type	object
properties
c1	The longitude coordinate, specifying degrees right ascension in the Galactic reference frame. Value must be in the range 0 <= c1 < 360.
	type	number
c2	The latitude coordinate, specifying degrees declination in the Galactic reference frame. Value must be in the range -90 <= c2 <= 90.
	type	number
pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
	type	number
	default	2000.0
parallax	The parallax in seconds of arc.
	type	number
	default	0.0
radial_velocity	Radial velocity along the line of sight in m/s.
	type	number
	default	0.0
additionalProperties	True
additionalProperties	True
Special sky direction 0.2
A sky direction whose coordinates are defined in Katpoint.
type	object
properties
target_name	A name for the target. This should be the name of a resolvable entity in Katpoint, for example, the name of a solar system body.
	type	string
reference_frame	Must be “special” for a catalogue sky direction. Validation is case-insensitive.
	type	string
additionalProperties	True
Two-Line Element sky direction 0.2
A sky direction defined by a Two-Line Element (TLE) set.
type	object
properties
target_name	A name for the target. For a TLE sky direction, this could be the name of a satellite in orbit.
	type	string
reference_frame	Must be “tle” for a sky direction defined in the TLE reference frame. Validation is case-insensitive.
	type	string
attrs	0.2*
	Attributes for a TLE sky direction.
	type	object
	properties
	line1	First line of a two-line element (TLE) sky direction.
		type	string
	line2	Second line of a two-line element (TLE) sky direction.
		type	string
	additionalProperties	True
additionalProperties	True
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
delay_poly	Delay polynomial source URI
	type	string
destinations	PST server addrs
	type	array
	items	PST beams description 0.2
		type	object
		properties
		data_host	dotted ipv4 address
			type	string
		data_port	UDP port number
			type	integer
		start_channel	first chan to host
			type	integer
		num_channels	no. chans to host
			type	integer
		additionalProperties	True
additionalProperties	True

Station_beams_to_correlate_0.2

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True

LOWCBF configurescan 0.1

Example JSON

{
    "interface": "https://schema.skao.int/ska-low-cbf-configurescan/0.0",
    "lowcbf": {
        "stations": {
            "stns": [
                [1, 0],
                [2, 0],
                [3, 0],
                [4, 0]
            ],
            "stn_beams": [{
                "beam_id": 1,
                "freq_ids": [64, 65, 66, 67, 68, 69, 70, 71],
                "boresight_dly_poly": "tango://delays.skao.int/low/stn-beam/1"
            }]
        },
        "timing_beams": {
            "beams": [{
                "pst_beam_id": 13,
                "stn_beam_id": 1,
                "offset_dly_poly": "url",
                "stn_weights": [0.9, 1.0, 1.0, 0.9],
                "jones": "url",
                "dest_ip": ["10.22.0.1:2345", "10.22.0.3:3456"],
                "dest_chans": [128, 256],
                "rfi_enable": [true, true, true],
                "rfi_static_chans": [1, 206, 997],
                "rfi_dynamic_chans": [242, 1342],
                "rfi_weighted": 0.87
            }]
        },
        "search_beams": "tbd",
        "zooms": "tbd"
    }
}

https://schema.skao.int/ska-low-cbf-configurescan/0.1
type	object
properties
interface	URI of JSON schema for this command’s JSON payload.
	type	string
lowcbf	LOWCBF configuration for scan
	LOWCBF_subarray_configurescan_0.1
additionalProperties	True

LOWCBF_subarray_configurescan_0.1

Correlator and Beamformer specific parameters. This section contains the parameters relevant only for CBF sub-system. This section is forwarded only to CBF subelement.

type	object
properties
stations	Subarray Stations and station beam input descriptions
	Subarray_stations_and_station_beams_0.1
timing_beams	PST beam outputs descriptions
	outer_0.1
search_beams	PSS beam outputs descriptions
	type	string
visibilities	Visibilities description 0.1
	Visibility output descriptions
	type	object
	properties
	fsp	FSP 0.1
		FSPs used for correlation
		type	object
		properties
		firmware	Firmware name
			type	string
		fsp_ids	List of IDs (integer)
			type	array
			items	type	integer
		additionalProperties	True
	stn_beams	SDP visibility destinations
		type	array
		items	Station_beams_to_correlate_0.1
	additionalProperties	True
zooms	placeholder zoom visibility output descriptions
	type	string
additionalProperties	True

Subarray_stations_and_station_beams_0.1

Station and station beams parameters

type	object
properties
stns	type	array
	items	type	array
		items	type	integer
stn_beams	type	array
	items	Subarray station beams 0.1
		type	object
		properties
		beam_id	station beam id
			type	integer
		freq_ids	list of station beam frequency ids
			type	array
			items	type	integer
		boresight_dly_poly	URL
			type	string
		additionalProperties	True
additionalProperties	True

outer_0.1

PST Outer

type	object
properties
beams	inner
	type	array
	items	PST_beams_description_0.1
additionalProperties	True

PST_beams_description_0.1

type	object
properties
stn_beam_id	Station beam ID for pst beamforming
	type	integer
pst_beam_id	PST beam ID
	type	integer
field	Sky direction
	field description
	anyOf	ICRS sky direction 0.1
		A sky direction defined in the ICRS reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “icrs” for a sky direction defined in the ICRS reference frame. Validation is case-insensitive.
			type	string
		attrs	0.1*
			Attributes for an ICRS sky direction
			type	object
			properties
			c1	The longitude coordinate, specifying degrees right ascension in the ICRS reference frame. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The latitude coordinate, specifying degrees declination in the ICRS reference frame. Value must be in the range -90 <= c2 <= 90.
				type	number
			pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
				type	number
				default	0.0
			epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
				type	number
				default	2000.0
			parallax	The parallax in seconds of arc.
				type	number
				default	0.0
			radial_velocity	Radial velocity along the line of sight in m/s.
				type	number
				default	0.0
			additionalProperties	True
		additionalProperties	True
		AltAz sky direction 0.1
		A sky direction defined in the AltAz reference frame
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Fixed as “altaz” for a sky direction defined in the AltAz reference frame. Validation is case-insensitive.
			type	string
		attrs	0.1*
			Allowed attributes for an AltAz sky direction
			type	object
			properties
			c1	The azimuth coordinate in degrees. Value must be in the range 0 <= c1 < 360.
				type	number
			c2	The elevation coordinate in degrees. Value must be in the range 0 <= c2 <= 90.
				type	number
			additionalProperties	True
		additionalProperties	True
		Galactic sky direction 0.1
		A sky direction defined in the Galactic reference frame.
		type	object
		properties
		target_name	A name for the target. If reference_frame is ‘special’ or ‘tle’ then the name might be of a solar system body or a satellite in Earth orbit.
			type	string
		reference_frame	Must be “galactic” for a sky direction defined in the Galactic reference frame. Validation is case-insensitive.
			type	string
		attrs	0.1*
			Attributes for a Galactic sky direction
			type	object
properties
c1	The longitude coordinate, specifying degrees right ascension in the Galactic reference frame. Value must be in the range 0 <= c1 < 360.
	type	number
c2	The latitude coordinate, specifying degrees declination in the Galactic reference frame. Value must be in the range -90 <= c2 <= 90.
	type	number
pm_c1	Longitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
	type	number
	default	0.0
epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
	type	number
	default	2000.0
parallax	The parallax in seconds of arc.
	type	number
	default	0.0
radial_velocity	Radial velocity along the line of sight in m/s.
	type	number
	default	0.0
additionalProperties	True
additionalProperties	True
Special sky direction 0.1
A sky direction whose coordinates are defined in Katpoint.
type	object
properties
target_name	A name for the target. This should be the name of a resolvable entity in Katpoint, for example, the name of a solar system body.
	type	string
reference_frame	Must be “special” for a catalogue sky direction. Validation is case-insensitive.
	type	string
additionalProperties	True
Two-Line Element sky direction 0.1
A sky direction defined by a Two-Line Element (TLE) set.
type	object
properties
target_name	A name for the target. For a TLE sky direction, this could be the name of a satellite in orbit.
	type	string
reference_frame	Must be “tle” for a sky direction defined in the TLE reference frame. Validation is case-insensitive.
	type	string
attrs	0.1*
	Attributes for a TLE sky direction.
	type	object
	properties
	line1	First line of a two-line element (TLE) sky direction.
		type	string
	line2	Second line of a two-line element (TLE) sky direction.
		type	string
	additionalProperties	True
additionalProperties	True
jones	Jones matrix source URI
	type	string
stn_weights	weights for each station
	type	array
	items	type	number
rfi_enable	Master enable for RFI flagging
	type	array
	items	type	boolean
rfi_static_chans	Freqency IDs to be always flagged
	type	array
	items	type	integer
rfi_dynamic_chans	Frequency IDs to be dynamically flagged
	type	array
	items	type	integer
rfi_weighted	Parameter for dynamic flagging
	type	number
firmware	Firmware name
	type	string
offset_dly_poly	Delay polynomial source URI
	type	string
dest_ip	Beam destination [ip_addr:port]
	type	array
	items	type	string
dest_chans	Number of fine chans to a destination
	type	array
	items	type	integer
additionalProperties	True

Station_beams_to_correlate_0.1

type	object
properties
stn_beam_id	Station Beam ID
	type	integer
integration_ms	milliseconds integration
	type	integer
host	SDP channel & IP Address
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
port	SDP chan & UDP port, stride
	type	array
	items	type	array
		items	type	integer
mac	SDP channel & server MAC
	type	array
	items	type	array
		items	anyOf	type	integer
				type	string
additionalProperties	True