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  1. SAFe Program
  2. SP-1056

Simulation of beam models and visibilities with DD corruptions for SKA1-LOW

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      In order to perform a fair and consistent comparison of ART DD imaging and calibration algorithms for generating SKA1 data products (SP-792) it will be important to agree upon, simulate and publish (scripts and/or data) for a small number of well defined input visibility data sets. Where at all possible, this should be built upon existing SKA1 simulations work (see linked features).

      Show
      In order to perform a fair and consistent comparison of ART DD imaging and calibration algorithms for generating SKA1 data products ( SP-792 ) it will be important to agree upon, simulate and publish (scripts and/or data) for a small number of well defined input visibility data sets. Where at all possible, this should be built upon existing SKA1 simulations work (see linked features).
    • Hide
      • Demonstrate that the SKA simulation can simulate realistic DD effects for SKA1-LOW that include both the instrumental response and an ionospheric propagation model.
      • Simulation scripts and data sets made available to begin comparison of the DD calibration and imaging algorithms identified in SP-792.
      Show
      Demonstrate that the SKA simulation can simulate realistic DD effects for SKA1-LOW that include both the instrumental response and an ionospheric propagation model. Simulation scripts and data sets made available to begin comparison of the DD calibration and imaging algorithms identified in SP-792 .
    • 2
    • 2
    • 8
    • Team_SIM
    • Sprint 5
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      The specification of the simulations, and some images and videos of the outputs are here: https://confluence.skatelescope.org/display/SE/Simulations+with+Direction-Dependent+Effects

      The measurement sets are available in the simulation data repository: https://console.cloud.google.com/storage/browser/ska1-simulation-data/ska1-low/direction_dependent_sims_SP-1056

      The results were presented at the DP ART system demo 7.5: https://confluence.skatelescope.org/display/SE/2020-08-12+DP+ART+System+Demo+7.5

      Initial feedback from the Schaap and Yanda teams indicates that the simulations look good.

      Show
      The specification of the simulations, and some images and videos of the outputs are here: https://confluence.skatelescope.org/display/SE/Simulations+with+Direction-Dependent+Effects The measurement sets are available in the simulation data repository: https://console.cloud.google.com/storage/browser/ska1-simulation-data/ska1-low/direction_dependent_sims_SP-1056 The results were presented at the DP ART system demo 7.5: https://confluence.skatelescope.org/display/SE/2020-08-12+DP+ART+System+Demo+7.5 Initial feedback from the Schaap and Yanda teams indicates that the simulations look good.
    • 8.1
    • Stories Completed, Outcomes Reviewed, NFRS met, Demonstrated, Satisfies Acceptance Criteria, Accepted by FO

    • PI24 - UNCOVERED

    • Team_SIM
    • SPO-573

    Description

      Note: this ticket is intended to capture the follow-up work of SP-796 concerning SKA1-LOW.

      Step 1: Simulations of the instrumental response should be combined with the simulation of ionospheric corruptions developed in -SP-651- to allow realistic simulation of DD effects along a given line of sight including both instrumental and ionospheric effects.

      Step 2: Create and make available a small number of reference visibility data sets for SKA1-LOW with varying levels of DD corruptions (beam, ionosphere). These simulations should be accompanied by a set of reference beam images/models and/or the scripts for generating them. These should be large enough to cover the first few side lobes of the primary beam and do not need to generated at the full time or frequency resolution of the visibility simulation. Another way to keep the size of the simulated visibility set manageable is to use fewer stations, for example those identified for AR1 or AR2.

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          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-1233 Compare screen-based DD imaging with facet-based DD imaging for SKA1-LOW

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          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-1096 Comparison of beam models for SKA1-LOW

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          • Done
          is required 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-1003 Analysis of state-of-the-art DDE algorithms with SKA1 simulated data

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          mentioned in

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                r.laing Laing, Robert
                s.wijnholds Wijnholds, Stefan
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                Feature Progress

                  Story Point Burn-up: (100.00%)

                  Feature Estimate: 2.0

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                  Total714.5

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