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PTCS Observing Scenarios

PTCS Observing Scenarios. Richard Prestage/Kim Constantikes. Overview of talk. Introductory remarks S1: beamswitching with subreflector S2: beamswitching with tertiary E1: checking subreflector collimation E2: fixed primary-subreflector distance S3: o-t-f mapping with tertiary scanning.

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PTCS Observing Scenarios

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  1. PTCS Observing Scenarios Richard Prestage/Kim Constantikes

  2. Overview of talk • Introductory remarks • S1: beamswitching with subreflector • S2: beamswitching with tertiary • E1: checking subreflector collimation • E2: fixed primary-subreflector distance • S3: o-t-f mapping with tertiary scanning

  3. Introductory remarks • Antenna Manager interprets commanded track, and generates stream of (az,el) demands • For desired motion of beam on sky; specify through main drives track/offset -> Wae /Oae • For motion of optical elements which should not affect target position on sky, specify through subreflector / feed / [tertiary] track -> OSR / OF / OT • PTCS control strategy will determine which optical element(s) will respond to specific input demands

  4. S1: Double beamswitching using subreflector

  5. S2: Double beamswitching using tertiary

  6. E1: Checking subreflector collimation

  7. E2: fixed primary-subreflector distance

  8. S3: Wide-field mapping/tertiary scanning

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