CSP configure 2.0

JSON schema and example for CSP Low configure

LOWCSP configure 2.0

Example JSON (LOW CSP Configuration for CBF 0.1)

{
    "interface": "https://schema.skao.int/ska-low-csp-configure/2.0",
    "subarray": {
        "subarray_name": "science period 23"
    },
    "common": {
        "config_id": "sbi-mvp01-20200325-00001-science_A",
        "subarray_id": 1,
        "eb_id": "eb-x449-20231105-34696"
    },
    "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"
            }]
        },
        "zooms": "tbd"
    },
    "pss": {},
    "pst": {
        "beams": []
    }
}

Example JSON (CSP configuration for PST voltage recorder scan 2.4)

{
    "interface": "https://schema.skao.int/ska-low-csp-configure/2.0",
    "subarray": {
        "subarray_name": "science period 23"
    },
    "common": {
        "config_id": "sbi-mvp01-20200325-00001-science_A",
        "subarray_id": 1,
        "eb_id": "eb-x449-20231105-34696"
    },
    "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",
                "rfi_enable": [true, true, true],
                "rfi_static_chans": [1, 206, 997],
                "rfi_dynamic_chans": [242, 1342],
                "rfi_weighted": 0.87
            }]
        },
        "zooms": "tbd"
    },
    "pss": {},
    "pst": {
        "beams": [{
            "beam_id": 13,
            "scan": {
                "activation_time": "2024-01-11T23:11:17Z",
                "num_of_polarizations": 2,
                "udp_nsamp": 32,
                "wt_nsamp": 32,
                "udp_nchan": 24,
                "num_frequency_channels": 432,
                "centre_frequency": 100000000.0,
                "total_bandwidth": 1562500.0,
                "bits_per_sample": 32,
                "observation_mode": "VOLTAGE_RECORDER",
                "observer_id": "jdoe",
                "project_id": "project1",
                "pointing_id": "pointing1",
                "source": "J1921+2153",
                "itrf": [5109360.133, 2006852.586, -3238948.127],
                "receiver_id": "receiver3",
                "feed_polarization": "LIN",
                "feed_handedness": 1,
                "feed_angle": 1.234,
                "feed_tracking_mode": "FA",
                "feed_position_angle": 10.0,
                "oversampling_ratio": [4, 3],
                "coordinates": {
                    "equinox": 2000.0,
                    "ra": "19:21:44.815",
                    "dec": "21:53:02.400"
                },
                "max_scan_length": 20000.0,
                "subint_duration": 30.0,
                "receptors": ["SKA001", "SKA036"],
                "receptor_weights": [0.4, 0.6],
                "num_channelization_stages": 2,
                "channelization_stages": [{
                    "num_filter_taps": 1,
                    "filter_coefficients": [1.0],
                    "num_frequency_channels": 1024,
                    "oversampling_ratio": [32, 27]
                }, {
                    "num_filter_taps": 1,
                    "filter_coefficients": [1.0],
                    "num_frequency_channels": 256,
                    "oversampling_ratio": [4, 3]
                }]
            }
        }]
    }
}

Low CSP specific parameters. This section contains the parameters relevant to configure the Low CSP sub-system.

https://schema.skao.int/ska-low-csp-configure/2.0
type	object
properties
interface	URI of JSON schema for this command’sJSON payload..
	type	string
subarray	subarray 2.0
	Subarray elements
	type	object
	properties
	subarray_name	Name and scope of current subarray the sub-array.
		type	string
	additionalProperties	True
common	Common section, containing the parameters and the sections belonging to all CSP subsystems. This section is forwarded to all sub-elements.
	Common_configuration_schema_2.0
lowcbf	Correlator and Beamformer specific parameters. This section contains the parameters relevant only for CBF sub-system. This section is forwarded only to CBF subelement.
	LOWCBF_subarray_configurescan_0.1
pss	PSS configuration schema 0.0
	Section with parameters to configure the PSS sub-system
	type	object
	properties
	dummy_param	type	string
	additionalProperties	True
pst	Section with parameters to configure the PST sub-system.
	PST_configure_2.4
additionalProperties	True

Common_configuration_schema_2.0

Common section, containing the parameters and the sections belonging to all CSP subsystems. This section is forwarded to all sub-elements.

type	object
properties
config_id	type	string
subarray_id	Subarray number
	type	integer
eb_id	Execution block ID to associate scan configs to an observation. This ID is used for associating generated data, especially data products, for a given observation. Multiple scans can be linked to one observation and this ID is used as metadata to associate the data products from all scans of the same observation. This ID does not have to be unique for a scan configuration but should be unique for different observations. For example, all the data and weights files will have an EB_ID header value populated with the value supplied in this field.
	type	string
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
			pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
				type	number
			epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
				type	number
			parallax	The parallax in seconds of arc.
				type	number
			radial_velocity	Radial velocity along the line of sight in m/s.
				type	number
			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
pm_c2	Latitudinal proper motion of target, measured in arcseconds per year.
	type	number
epoch	Epoch of proper motion, giving the date when the proper motion offset was zero.
	type	number
parallax	The parallax in seconds of arc.
	type	number
radial_velocity	Radial velocity along the line of sight in m/s.
	type	number
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
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

PST_configure_2.4

Main configuration for the CSP Pulsar timing sub-system

type	object
properties
beams	List of PST Beams IDs to configure
	type	array
	items	CSP configurescan pst beams 2.4
		Parameters to configure the PST sub-system
		type	object
		properties
		beam_id	Configuration for a PST beam ID in low csp
			type	integer
		scan	PST specific scan configuration parameters.
			PST_scan_configuration_2.4
		beam	PST specific beam configuration parameters. Deprecated: As of version 2.3 this schema has no elements and is deprecated, and has been removed in version 3.0 of the schema.
			PST_beam_configuration_2.4
		additionalProperties	True
additionalProperties	True

PST_scan_configuration_2.4

PST specific scan configuration parameters.

type	object
properties
activation_time	Date and time when to start the PST reconfiguration. Deprecated: this field has been removed in version 3.0 of the PST schema. This field has never been used by PST and was always ignored. Units: UTC timestamp Keyword: ACTIVATION_TIME
	type	string
timing_beam_id	Identifier assigned by LMC/TMC used to identify the beam configuration. PST selects which PST server to use for this scan and timing beam, and provides a mapping from the timing beam identifier by the TM to PST capability id. This attribute is mandatory on only the CSP-PST interface. Keyword: BEAM
	type	string
bits_per_sample	The number of bits per complex-values time sample in the CBF output data. Valid values are 16, 24, or 32. Deprecated: this field has been removed in version 3.0 of the PST schema. This can be inferred from the telescope and and frequency band. Keyword: NBIT
	type	integer
num_of_polarizations	The number of polarizations in the CBF output data. Valid values are 1 or 2. Note: all SKA receivers produce two polarisation inputs, and the correlator produces products for both polarisations. The value of 1 was added to allow for future capability if the need arises. Deprecated: this field has been removed in version 3.0 of the PST schema. This can be inferred from the telescope and and frequency band. Keyword: NPOL
	type	integer
udp_nsamp	The number of time samples for each single polarization and the a single frequency in each UDP packet sent by CBF. Note: this must be an integer multiple of WT_NSAMP Deprecated: this field has been removed in version 3.0 of the PST schema. This can be inferred from the telescope and and frequency band. Range: 32 (Low), 4 (Mid) Keyword: UDP_NSAMP
	type	integer
wt_nsamp	The number of time samples described by as single relative weight. There is a unique relative weight for each frequency channel, and each relative weight describes both polarizations. Deprecated: this field has been removed in version 3.0 of the PST schema. This can be inferred from the telescope and and frequency band. Range: 32 (Low), 4 (Mid) Keyword: WT_NSAMP
	type	integer
udp_nchan	The number of contiguous frequency channels in each UDP packet sent by CBF. Deprecated: this field has been removed in version 3.0 of the PST schema. This can be inferred from the telescope and and frequency band. Range: 24 (Low), 185 (Mid) Keyword: UDP_NCHAN
	type	integer
num_frequency_channels	The total number of frequency channels into which the total critical bandwidth has been divided. This must be an integer multiple of udp_nchan Deprecated: this field has been removed in version 3.0 of the PST schema. This can be inferred from the telescope and and frequency band. It is also required to be a multiple of the udp_chan which is also now deprecated for the same reason. Range: 1 to 82944 Keyword: OBSNCHAN
	type	integer
centre_frequency	Centre frequency of the total (critical) bandwidth spanned by the frequency channels. Units: Hz Range: 50e6 to 12800e6 Keyword: OBSFREQ
	type	number
total_bandwidth	Total (critical) bandwidth spanned by the channels of the observation. Low: 0.00361 to 300 MHz Mid: 0.053.76 to 2500 MHz Units: Hz Range: 3610 to 2.5e9 Keyword: OBSBW
	type	number
observation_mode	The PST processing mode used for the scan. The value VOLTAGE_RECORDER is added for AA0.5, while the other values will be needed in the future for data processing. Deprecated: this field has been renamed to pst_processing_mode in version 3.0 of the PST schema. Keyword: OBSMODE
	type	string
observer_id	The observer in charge of the observations. Keyword: OBSERVER
	type	string
project_id	The project that the observations are for. Keyword: PROJID
	type	string
pointing_id	The ID for the sub-array pointing. Deprecated: this field has been removed in version 3.0 of the PST schema. Keyword: PNT_ID
	type	string
source	The name of the source. Keyword: SRC_NAME
	type	string
itrf	The International Terrestrial Reference Frame (ITRF) coordinates of the telescope delay centre. Deprecated: this field has been renamed to “delay_centre” in version 3.0 of the PST schema. Units: metres Keyword: ITRF
	type	array
	items	type	number
receiver_id	The receiver name or ID. Keyword: FRONTEND
	type	string
feed_polarization	The native polarization of feed. Deprecated: this field has been removed in version 3.0 of the PST schema. Range: LIN or CIRC Keyword: FD_POLN
	type	string
feed_handedness	Code for sense of feed. For value of +1 for XYZ forming RH set with Z in the direction of propagation. Looking up into the feed of a prime-focus receiver or at the sky). For FD_HAND = +1, the rotation from A (or X) to B (or Y) is counter clockwise or in the direction of increasing Feed Angle (FA) or Position Angle (PA). For circular feeds, FD_HAND = +1 for IEEE LCP on the A (or X) probe. Deprecated: this field has been removed in version 3.0 of the PST schema. Range: -1 or +1 Keyword: FD_HAND
	type	integer
feed_angle	Feed angle of the E-vector for an equal in-phase response from the A(X) and B(Y) probes, measured in the direction of increasing feed angle or position angle (clockwise when looking down on a prime focus receiver). Deprecated: this field has been removed in version 3.0 of the PST schema. Units: degrees Range: -180 to 180. Keyword: FD_SANG
	type	number
feed_tracking_mode	The tracking mode for the feed: FA - constant feed angle and that the feed stays fixed with respect to the telescope’s reference frame. CPA - the feed rotates to maintain a constant phase angle (i.e. it tracks the variation of the parallactic angle.). When the coordinate mode is GALACTIC, PA is with respect to Galactic north and similarly for coordinate mode ECLIPTIC then PA is with respect to ecliptic north. SPA - the feed angle is held fixed at an angle such that the requested PA is obtained at the mid-point of the observation. TPA - is only relevant for scan observations - the feed is rotated to maintain a constant angle with respect to the scan direction. Deprecated: this field has been removed in version 3.0 of the PST schema. Range: FA, CPA, SPA, or TPA Keyword: FD_MODE
	type	string
feed_position_angle	The requested angle of feed reference. For feed_mode = ‘FA’ this is respect to the telescope’s reference frame (feed_angle = 0), and for feed_mode = ‘CPA’ this is with respect to the celestial north (parallactic angle = 0) or with respect to the Galactic north for coordinate_mode = ‘GALACTIC’. Deprecated: this field has been removed in version 3.0 of the PST schema. Range: -180 to +180. Keyword: FA_REQ
	type	number
oversampling_ratio	The oversampling ratio expressed as a fraction as an array of int, with the first value the numerator and the second is the denominator. (e.g. 8/7 is assigned as [8,7]). Deprecated: this field has been removed in version 3.0 of the PST schema. This can be inferred from the telescope and and frequency band. Range: 8/7 or 4/3 Keyword: OVERSAMP
	type	array
	items	type	integer
coordinates	The tied-array beam’s tracking co-ordinates. As of version 2.2 of the schema this only handles equatorial tracking which means uses RA/Dec J2000.0 coords but PST may support different tracking modes and coordinates the future.
	PST_RA_Dec_coordinates_2.4
max_scan_length	The maximum length of the observation. Units: seconds Range: 30 - 43200 Keyword: SCANLEN_MAX
	type	number
subint_duration	The length of each output sub-integration. Units: seconds Range: 1 - 60 Keyword: OUTSUBINT
	type	number
receptors	An array of receptor IDs for the receptors included in the sub-array. Keyword: ANTENNA
	type	array
	items	type	string
receptor_weights	Weight for each receptor. Range: 0 - 1.0 Keyword: ANT_WEIGHTS
	type	array
	items	type	number
num_rfi_frequency_masks	The number of frequency ranges to be masked. Deprecated: this field has been removed in version 3.0 of the PST schema. This is will be inferred by length of rfi_frequency_masks. Range: 0 - 1024 Keyword: NMASK
	type	integer
rfi_frequency_masks	A two-dimensional array of length of num_frequency_mask of known RFI frequency ranges to excise from the data. The array contains mask pairs of [f_min, f_max] pairs for known frequency ranges containing RFI not excised by the CBF. The overall dimension of this array is num_frequency_mask x 2. Units: Hz Keyword: FREQ_MASK
	type	array
	items	allOf	type	array
			items	type	number
destination_address	The destination address for the PST output data. Includes IPv4 Address, port number. Deprecated: this field has been removed in version 3.0 of the PST schema.
	type	array
	items	anyOf	type	string
			type	integer
test_vector_id	Identifier for a test vector that will be present in the tied-array beam data stream beam CBF and PST. Deprecated: This field has never been used and has been removed in version 3.0 of the PST schema. Keyword: TEST_VECTOR
	type	string
pt	PST specific parameters for the ‘PULSAR_TIMING’ mode configuration.
	PST_PULSAR_TIMING_mode_configuration_2.4
ds	PST specific parameters for the ‘DETECTED_FILTERBANK’ mode configuration.
	PST_DETECTED_FILTERBANK_mode_configuration_2.4
ft	PST specific parameters for the ‘FLOW_THROUGH’ mode configuration.
	PST_FLOW_THROUGH_mode_configuration_2.4
num_channelization_stages	The number of stages used to channelize the data: e.g. * for Low, there are 2 stages: 1 in LFAA and 1 in CBF * for Mid, there are 2 stages: 1 in FSP and 1 in PST BF. Deprecated: This field has been removed in version 3.0 of the PST schema. The information for this field and channelization_stages can be inferred from the telescope and frequency band. Keyword: NSTAGE
	type	integer
channelization_stages	List of configuration for each channelization stage. Deprecated: This field has been removed in version 3.0 of the PST schema. The information for this field and num_channelization_stages can be inferred from the telescope and frequency band.
	type	array
	items	PST specific parameters for channelization stage configuration. Deprecated: This field has been deprecated and has been removed in version 3.0 of PST schema.
		PST_channelization_stage_configuration_2.4
additionalProperties	True

PST_RA_Dec_coordinates_2.4

PST specific parameters for RA/Dec tracking coordinates.

type	object
properties
equinox	The coordinate epoch. This can be in Julian date or Modified Julian Date. Units: years Range: >= 2000 Keyword: EQUINOX
	type	number
ra	The Right Accession (RA) of the coordinates used for tracking. Valid formats is ‘hh:mm:ss.sss’ or ‘ddd.ddd’ Keyword: STT_CTD1
	type	string
dec	The declination (Dec) of the coordinates used for tracking. Valid formats is ‘hh:mm:ss.sss’ or ‘ddd.ddd’ Keyword: STT_CTD2
	type	string
additionalProperties	True

PST_PULSAR_TIMING_mode_configuration_2.4

PST specific parameters for the ‘PULSAR_TIMING’ mode configuration.

type	object
properties
dispersion_measure	The dispersion measure for coherent/incoherent de-dispersion. Units: pccm^-3 Range: 0 - 100000 Keyword: DM
	type	number
rotation_measure	The rotation measure for phase-coherent Faraday rotation correction. Units: radians per metre squared Keyword: RM
	type	number
ephemeris	The ephemeris of the pulsar being observed. Units: PSRCAT compatible ASCII string Keyword: EPHEMERIS
	type	string
pulsar_phase_predictor	Pulsar phase predictor generated from ephemeris. Units: TEMPO2 compatible ASCII string Keyword: PREDICTOR
	type	string
output_frequency_channels	The number of output frequency channels. This must be between 1 and the number of observation channels. Keyword: OUTNCHAN
	type	integer
output_phase_bins	The number of output phase bins. Range: 64 - 2048 Keyword: OUTNBIN
	type	integer
num_sk_config	Removed in version 4.0.
	type	integer
sk_config	List of spectral kurtosis configurations.
	type	array
	items	PST specific parameters for the spectral kurtosis (SK) for the ‘PULSAR_TIMING’ mode.
		PST_spectral_kurtosis_configuration_2.4
target_snr	The signal-to-noise ratio (SNR) of the on-pulse flux for the scan. May be used to prematurely end a scan when the integrated SNR reaches the target. A value of 0 indicates there is no limit. Keyword: TARGET_SNR
	type	number
additionalProperties	True

PST_spectral_kurtosis_configuration_2.4

PST specific parameters for the spectral kurtosis (SK) for the ‘PULSAR_TIMING’ mode.

type	object
properties
sk_range	Frequency ranges for each spectral kurtosis (SK) configuration. Use a pair of channel index values instead.
	type	array
	items	type	number
sk_integration_limit	The number of input time samples integrated into each spectral kurtosis (SK) statistic. Range: 64 - 1024 Keyword: SK_INTS
	type	integer
sk_excision_limit	Spectral kurtosis excision limits (RFI threshold) in units of standard deviations. Range: 1 - 100 Keyword: SK_EXIS
	type	number
additionalProperties	True

PST_DETECTED_FILTERBANK_mode_configuration_2.4

PST specific parameters for the ‘DETECTED_FILTERBANK’ mode configuration.

type	object
properties
dispersion_measure	The dispersion measure for coherent/incoherent de-dispersion. This is only required for pulsar timing and Detected Filterbank modes. Range: [0, 100000] Keyword: DM
	type	number
rotation_measure	The rotation measure for phase-coherent Faraday rotation correction. Units: radians per metre squared Keyword: RM
	type	number
output_frequency_channels	The number of output frequency channels. This must be between 1 and the number of observation channels. Keyword: OUTNCHAN
	type	integer
stokes_parameters	The Stokes parameters to output when in Detected Filterbank mode. Range: string with a combination of I, Q, U, and V. Keyword: STOKES_FB
	type	string
num_bits_out	The number of bits per output sample. Range: 1, 2, 4, 8, or 16 Keyword: NBIT_OUT
	type	integer
time_decimation_factor	The number of input samples per output time sample when in Detected Filterbank mode. Keyword: TDEC_FB
	type	integer
frequency_decimation_factor	The number of input frequency channels incoherently added to each output frequency channel in Detected Filterbank. This is required in addition to output_frequency_channels because some frequency channels may be merged coherently to increase temporal resolution. Keyword: FDEC_FB
	type	integer
sk_config	List of spectral kurtosis configurations.
	type	array
	items	PST specific parameters for the spectral kurtosis (SK) for the ‘PULSAR_TIMING’ mode.
		PST_spectral_kurtosis_configuration_2.4
num_sk_config	Removed in version 4.0.
	type	integer
requantisation_scale	Removed in version 4.0.
	type	number
requantisation_length	Removed in version 4.0.
	type	number
additionalProperties	True

PST_FLOW_THROUGH_mode_configuration_2.4

PST specific parameters for the ‘FLOW_THROUGH’ mode configuration.

type	object
properties
num_bits_out	The number of bits per output sample. Range: 1, 2, 4, 8, 16, or 32 Keyword: NBIT_OUT
	type	integer
channels	The indices of the first and last (inclusive) frequency channels that define the single contiguous range of frequency channels to be recorded. Keyword: CHAN_FT
	type	array
	items	type	integer
requantisation_scale	Scale factor applied during re-quantisation that modifies the dynamic range of the fixed precision output. By default, for 2, 4, and 8 bits per sample, data will be scaled to minimize scattered power by adopting the Optimum Input Threshold Spacing for a Uniform Digitizer defined in Table 3 of Jenet & Anderson (1998; PASP 110:1467). For more than 8 bits per sample, the values from Table 3 of Jenet & Anderson (1998) are extrapolated to num_bits_out-2, such that 2 bits are retained as additional headroom for RFI. For all num_bits_out, the standard deviation is that of either the real or imaginary part of each complex-valued sample. The default scale factor is computed such that, after multiplication by this scale factor, the data would satisfy the conditions described above. This default scale factor is multiplied by requantisation_scale. Therefore, a requantisation_scale value greater than 1 increases the value of the floating point data before it is cast to a fixed precision value, thereby reducing the overhead available to represent RFI and increasing the probability of clipping. Keyword: DIGITIZER_SCALE
	type	number
num_channels	The number of input channels to be recorded. This value must be less than or equal to the output_frequency_channels. Keyword: NCHAN_FT
	type	integer
requantisation_length	Length of data to be used when determining the scaling factors used for fixed precision output during re-quantisation. Units: seconds Keyword: DIGITIZER_LENGTH
	type	number
additionalProperties	True

PST_channelization_stage_configuration_2.4

PST specific parameters for channelization stage configuration.

Deprecated: This field has been deprecated and has been removed in version 3.0 of PST schema.

type	object
properties
num_filter_taps	Total number of taps in the prototype filter (i.e. over all arms) used in the stage. Deprecated: This field has been deprecated and has been removed in version 3.0 of PST schema. This field can also be inferred from the length of the filter_coefficients field. Keyword: NSTAP_k
	type	integer
filter_coefficients	An array of filter coefficients that define the (time domain) response function of the prototype filter used in the stage. Length of this is num_filter_taps. Deprecated: This field has been deprecated and has been removed in version 3.0 of PST schema. Keyword: COEFF_k
	type	array
	items	type	number
num_frequency_channels	The number of frequency channels output by each polyphase filter bank (PFB) for this stage. Deprecated: This field has been deprecated and has been removed in version 3.0 of PST schema. This field can be determined by which telescope and frequency band. Keyword: NCHAN_PFB_k
	type	integer
oversampling_ratio	The oversampling ratio expressed as a fraction as an array of int, with the first value the numerator and the second is the denominator. (e.g. 8/7 is assigned as [8,7]). Deprecated: This field has been deprecated and has been removed in version 3.0 of PST schema. This field can be determined by which telescope and frequency band. Keyword: OVERSAMP_k
	type	array
	items	type	integer
additionalProperties	True

PST_beam_configuration_2.4

PST specific beam configuration parameters.

Deprecated: As of version 2.3 this schema has no elements and is deprecated, and has been removed in version 3.0 of the schema.

type	object
properties
additionalProperties	True