Low TMC configure 2.0
Example JSON.
{
"interface": "https://schema.skao.int/ska-low-tmc-configure/2.0",
"transaction_id": "txn-....-00001",
"mccs": {
"stations": [{
"station_id": 1
}, {
"station_id": 2
}],
"subarray_beams": [{
"subarray_beam_id": 1,
"station_ids": [1, 2],
"update_rate": 0.0,
"channels": [
[0, 8, 1, 1],
[8, 8, 2, 1],
[24, 16, 2, 1]
],
"antenna_weights": [1.0, 1.0, 1.0],
"phase_centre": [0.0, 0.0],
"target": {
"reference_frame": "HORIZON",
"target_name": "DriftScan",
"az": 180.0,
"el": 45.0
}
}]
},
"tmc": {
"scan_duration": 10.0
}
}
type |
object |
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properties |
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|
URI of JSON schema applicable to this JSON payload. |
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type |
string |
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|
A transaction id specific to the command |
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type |
string |
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|
MCCS configure 2.0 |
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MCCS configuration specification. |
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type |
object |
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properties |
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|
IDs of the MCCS stations to configure. Maximum array size = 512, the maximum number of MCCS stations. |
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type |
array |
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items |
type |
object |
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properties |
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|
MCCS Station ID. Each ID must be between 1 and 512. |
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type |
integer |
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additionalProperties |
True |
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|
MCCS sub-array beam configuration. |
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type |
array |
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items |
MCCS subarray beams 2.0 |
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type |
object |
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properties |
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|
ID of MCCS sub-array beam to configure. ID must be an integer between 1 and 48. |
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type |
integer |
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|
Cadence in seconds of pointing correction updates. If set, the value must be 0.0 or greater. |
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type |
number |
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|
IDs of MCCS stations within this sub-array beamto configure. Array size must be less than 512, the maximum number of MCCS stations. Each item in the list must be an integer between 1 and 512. |
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type |
array |
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default |
null |
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items |
type |
integer |
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|
Channel block configurations. Each item in the list is a channel block configuration, each specified as a list of 4 numbers as follows: [start channel, number of channels, beam index, sub-station index] Constraints are: 0 < start channel < 376 start channel must be a multiple of 8 8 < number of channels < 48 1 < beam index < 48 1 < sub-station index < 8 |
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type |
array |
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default |
null |
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items |
type |
array |
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items |
type |
integer |
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|
Antenna weights. Maximum array size = 512 (=256 antennas x2 pols per sub-array beam). Antennas signals can be weighted to modify the station beam, varying from 0.0 for full exclusion to potentially 256.0 for an antenna contribution compensated for the number of antennas in the beam. This value is an amplitude multiplier added to that antenna signal before adding into the sum. Weights apply to all channels assigned to a beam. |
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type |
array |
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default |
null |
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items |
type |
number |
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|
Phase centre offset for the station beam, in metres. The reference position for station phase must be modified to reflect antenna weighting and their contribution to the station beam. This offset can be can considered the desired centre of mass for the station. Constraints: array size = 2 -20 < phase centre value < 20 |
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type |
array |
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default |
null |
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items |
type |
number |
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|
MCCS target 2.0 |
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Target position for the sub-array beam. Only drift scan targets are currently implemented by MCCS, hence only azimuth and elevation are specified. |
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type |
object |
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default |
null |
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properties |
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|
Co-ordinate system. Must be HORIZON for drift scan. |
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type |
string |
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|
Name of target. |
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type |
string |
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|
Pointing azimuth in degrees. |
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type |
number |
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|
Pointing elevation in degrees. |
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type |
number |
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additionalProperties |
True |
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additionalProperties |
True |
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additionalProperties |
True |
||||||
|
TMC configuration specification. |
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type |
object |
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properties |
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|
Scan duration in seconds. Value must be >= 0.0 |
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allOf |
type |
number |
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additionalProperties |
True |
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additionalProperties |
True |
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