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  1. SAFe Program
  2. SP-288

Evaluation of LEAP for LOW tied-array beam-forming

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    • PI3
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    • Data Processing
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      Ability to correct for direction-dependent ionosphere in tied-array beamforming. No other algorithms have yet been proposed for this purpose.

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      Ability to correct for direction-dependent ionosphere in tied-array beamforming. No other algorithms have yet been proposed for this purpose.
    • Hide

      Outputs:

       * Examples of atmospheric measurements, for a range of conditions (freq and turbulence), suitable for feeding into simulations

        * Estimates of timescales, rates and residuals

        * Tests with and without RFI, with success statistics

        * Tests of a range of synthesised bandwidths (new MWA obs) 

        * Measurements of computing requirements for each component of the chain (new analysis)

        * a CPU example of a parallel LEAP calibration (coding)

        * a GPU example of a parallel LEAP calibration (coding)

       

      Show
      Outputs:  * Examples of atmospheric measurements, for a range of conditions (freq and turbulence), suitable for feeding into simulations   * Estimates of timescales, rates and residuals   * Tests with and without RFI, with success statistics   * Tests of a range of synthesised bandwidths (new MWA obs)    * Measurements of computing requirements for each component of the chain (new analysis)   * a CPU example of a parallel LEAP calibration (coding)   * a GPU example of a parallel LEAP calibration (coding)  
    • 3
    • 3
    • 3.333
    • Team_YANDA
    • Sprint 5
    • Hide

      https://jira.skatelescope.org/secure/attachment/13726/13726_Sp-288-report.pdf
      Lightweight document: PDF: https://drive.google.com/a/skaint.org/file/d/1Um4ptyBTP9Ez_TsCWkg-kUK3GlK270A4/view?usp=sharing

      Show
      https://jira.skatelescope.org/secure/attachment/13726/13726_Sp-288-report.pdf Lightweight document: PDF:  https://drive.google.com/a/skaint.org/file/d/1Um4ptyBTP9Ez_TsCWkg-kUK3GlK270A4/view?usp=sharing
    • 3.6

    • PI24 - UNCOVERED

    • Team_YANDA

    Description

      There is a requirement to form tied-array beams (for pulsar search and timing or VLBI) anywhere in the LOW field of view. Because of ionospheric anisoplanatism, this will require direction-dependent corrections in addition to the standard direction-independent complex gain solutions. At present, only direction-independent calibration against a known global sky model is envisaged.

      LEAP (Rioja, Dodson & Franzen 2018; MN 478, 2337) is a method for evaluating delays for a grid of sources across the sky, from which solutions can be interpolated to arbitrary directions and provided to CSP for beam-forming. It is embarrassingly parallel, and therefore has the potential to run on ionospheric variation timescales, at least for compact configurations.

      This feature is to evaluate the potential of LEAP for real-time beamforming.

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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-421 LEAP DD-Calibration Post-CDR Development

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          Spike - A time limited investigation to get some knowledge SP-307 L1 requirement for time-criticality of real-time calibration

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                r.laing Laing, Robert
                r.laing Laing, Robert
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