The sb_definition module models SB data model entities concerned with the high-level composition of a Scheduling Block. An SB defines everything needed to schedule and perform an observation, for instance:

  • Target telescope

  • Dish allocations to sub-arrays (for SKA MID);

  • Dish configurations (receiver bands, etc., for SKA MID);

  • MCCS resource allocations to sub-arrays (for SKA LOW);

  • Sub-array Beam configurations (channels, antenna weights etc., for SKA LOW);

  • Target Beam configuration, defining the required Target for subarray beam configuration (for SKA LOW);

  • Targets and field positions, describing which points to observe on the sky;

  • CSP (Central Signal Processing) correlator configurations to be used;

  • SDHP configuration, defining the required pipeline workflows for the observation;

  • Scan information, which describes which CSP/SDHP/dish/target configurations to be used for each scan;

  • Scan sequence describing the sequence of scans constituting the observation.

as well as:

  • SB metadata (author, creation date and version number, as well as edit history);

  • SB script execution requirements;

The contents of the module are presented in the diagram below.


Class diagram for the sb_definition module

# JSON modelled specifically by sb_definition
  "sbd_id": "sbi-mvp01-20200325-00001",
  "telescope": "ska_mid",
  "interface": "",
  "metadata": {
    "version": 1,
    "created_by": "Liz Bartlett",
    "created_on": "2022-03-28T15:43:53.971548",
    "last_modified_on": null,
    "last_modified_by": null
  "activities": ...
  "dish_allocations": ...
  "csp_configurations": ...
  "dish_configurations" : ...
  "targets": ...
  "sdp_configuration": ...
  "scan_definitions": ...
  "scan_sequence": [
    "A", "B", "B", "A"

The entities.scheduling_block_entity module defines a simple Python representation of the scheduling block that contains the details of the observation

class MetaData(*, version: int | None = 1, created_on: datetime | None = None, created_by: str | None = None, last_modified_on: datetime | None = None, last_modified_by: str | None = None)[source]

MetaData Class

class SBDefinition(*, interface: str | None = '', sbd_id: str | None = None, telescope: TelescopeType | None = None, metadata: MetaData | None = None, activities: Dict[str, PythonProcedure] | None = None, targets: List[Target] | None = None, scan_definitions: List[ScanDefinition] | None = None, scan_sequence: List[str] | None = None, sdp_configuration: SDPConfiguration | None = None, dish_configurations: List[DishConfiguration] | None = None, csp_configurations: List[CSPConfiguration] | None = None, dish_allocations: DishAllocation | None = None, mccs_allocation: MCCSAllocation | None = None, subarray_beam_configurations: List[SubarrayBeamConfiguration] | None = None, target_beam_configurations: List[TargetBeamConfiguration] | None = None)[source]

SKA scheduling block

class TelescopeType(value)[source]

TelescopeType represents which telescope is being used