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  1. SAFe Program
  2. SP-4225

TMC Low capable of controlling and monitoring tied-array beam (PST) observations

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Details

    • Obs Mgt & Controls
    • Hide

      Tied-array beam observations form the basis of two key SKA observing modes (PST and PSS), enabling this for AA0.5 allows the commissioning and verification of the telescope (LOW) for this type of observation, derisking the control and monitoring aspects.

      Show
      Tied-array beam observations form the basis of two key SKA observing modes (PST and PSS), enabling this for AA0.5 allows the commissioning and verification of the telescope (LOW) for this type of observation, derisking the control and monitoring aspects.
    • Hide

      TMC Low is able to configure a subarray for a scan that includes forming of a single PST beam at boresight and saving beamformed data.   This work does not include ability to generate and provide to CBF polynomials for stearing the PST beam. 

      Show
      TMC Low is able to configure a subarray for a scan that includes forming of a single PST beam at boresight and saving beamformed data.   This work does not include ability to generate and provide to CBF polynomials for stearing the PST beam. 
    • 2
    • 2
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    • Sub-system Version REL-1556 TMC Low supports tied-array beam (PST) observations and Improved Obs State aggregation

    • Team_SAHYADRI
    • Sprint 5
    • Hide

      OSO-TMC AssignResources and Configure schema to support PST observations is added to the TEL Model
      MR link: https://gitlab.com/ska-telescope/ska-telmodel/-/merge_requests/175
      The Tel Model changes are utilized on the TMC SubarrayNode to support PST and to validate the jsons
      Added delay_poly and jones keys per beams for low CBF
      PST observation to be based on having pst and pss keys optionals under TMC-CSP schema. (This is to support PST and non PST observations) (This is in accordance with SKA Tel Model)
      TMC nodes are updated to support PST observations, and verified using OSO-TMC AssignResources and Configure schema which includes PST and PSS.

      Verified the TMC-CSP interface on low TMC integration repository
      Verified TMC with mocks and TMC with real CSP pair
      Test Data:
      AssignResources OSO-TMC schema for PSS and PST : https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-low-integration/-/blob/main/tests/data/centralnode/assign_resources_json.json?ref_type=heads
      Configure OSO-TMC schema for PSS and PST: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-low-integration/-/blob/main/tests/data/subarray/configure_low.json?ref_type=heads
      MR link: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-low-integration/-/merge_requests/51
      TMC low chart v0.18.0 is released to support this objective REL-1556

      Work remaining:

      TMC needs to provide delay tracking for PST beam at bore-sight (ok to provide zeros offsets).(This is planned for PI24 due to scope change and insufficient  information in PI23). SDP team has asked TMC to specify the changed json and attribute as TMC is the consumer, while SDP will provide it. This work is planned for PI24, SP-4655

      Show
      OSO-TMC AssignResources and Configure schema to support PST observations is added to the TEL Model MR link: https://gitlab.com/ska-telescope/ska-telmodel/-/merge_requests/175 The Tel Model changes are utilized on the TMC SubarrayNode to support PST and to validate the jsons Added delay_poly and jones keys per beams for low CBF PST observation to be based on having pst and pss keys optionals under TMC-CSP schema. (This is to support PST and non PST observations) (This is in accordance with SKA Tel Model) TMC nodes are updated to support PST observations, and verified using OSO-TMC AssignResources and Configure schema which includes PST and PSS. Verified the TMC-CSP interface on low TMC integration repository Verified TMC with mocks and TMC with real CSP pair Test Data: AssignResources OSO-TMC schema for PSS and PST : https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-low-integration/-/blob/main/tests/data/centralnode/assign_resources_json.json?ref_type=heads Configure OSO-TMC schema for PSS and PST: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-low-integration/-/blob/main/tests/data/subarray/configure_low.json?ref_type=heads MR link: https://gitlab.com/ska-telescope/ska-tmc/ska-tmc-low-integration/-/merge_requests/51 TMC low chart v0.18.0 is released to support this objective REL-1556 Work remaining : TMC needs to provide delay tracking for PST beam at bore-sight (ok to provide zeros offsets).(This is planned for PI24 due to scope change and insufficient  information in PI23). SDP team has asked TMC to specify the changed json and attribute as TMC is the consumer, while SDP will provide it. This work is planned for PI24, SP-4655
    • 23.6
    • Stories Completed, Integrated, Outcomes Reviewed, Demonstrated, Satisfies Acceptance Criteria, Accepted by FO

    • PI24 - UNCOVERED

    • Team_SAHYADRI

    Description

      What & Why?

      Tied-array beam formed observations take the signals from multiple stations from within the LOW array, coherently adding the recovered voltages to provide data in a single 'look direction' (to the data recovered from a classic 'single dish' radio telescope). Such an observing mode, when coupled with an appropriate backend, allows for example Pulsar Timing (PST) observations.

      Who?

      • Commissioning Science
      • Science Operations
      • PST developers

      Attachments

        Issue Links

          Child Of

          Enabler - An Enabler supports the activities needed to extend the Architectural Runway to provide future business functionality. These include exploration, architecture, infrastructure, and compliance. SS-146 Low tied-array beam complex voltage data capture

          • Medium - Has the potential to affect progress.
          • Implementing
          is cloned by

          Feature - A Feature is a service that fulfills a stakeholder need. Each feature includes a benefit hypothesis and acceptance criteria, and is sized or split as necessary to be delivered by a single Agile Release Train (ART) in a Program Increment (PI). SP-4655 TMC Low provides delay tracking for tied-array beam (PST) observations (Cloned SP-4225)

          • High - Serious problem that could block progress.
          • Implementing
          Is delivered by

          Sub-system Version - A version of a sub-system, used in the Release Management and Configuration Management process REL-1556 TMC Low supports tied-array beam (PST) observations and Improved Obs State aggregation

          • Released

          Structure

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              People

                s.vrcic Vrcic, Sonja
                Adam.Avison Avison, Adam
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                Feature Progress

                  Story Point Burn-up: (100.00%)

                  Feature Estimate: 2.0

                  IssuesStory Points
                  To Do00.0
                  In Progress   00.0
                  Complete313.0
                  Total313.0

                  Dates

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                    Resolved:

                    Structure Helper Panel