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ATCA Reference Pointing:

ATCA Reference Pointing:. 22 GHz reference pointing works! RJS reports success at 3 mm (in good weather only). Further Pointing Issues:. Cannot determine pointing scheme. Minimum 2 integrations per point. Cannot select maser lines On-line (CAGET) system does not have spectral information!

samuel-charles
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ATCA Reference Pointing:

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  1. ATCA Reference Pointing: • 22 GHz reference pointing works! • RJS reports success at 3 mm (in good weather only)

  2. Further Pointing Issues: • Cannot determine pointing scheme. • Minimum 2 integrations per point. • Cannot select maser lines • On-line (CAGET) system does not have spectral information! • Manual setting in TKCOR

  3. Tracking Errors: • Mismatch in sin and cos channels from fine encoders. • Periodic in azimuth and elevation. • Gain mismatch => period ~ 0.7° • DC bias => period ~ 1.4 ° • Determine tracking errors by observing calibrator at half-power point.

  4. Azimuth Tracking Errors:

  5. Elevation Tracking Errors:

  6. Phase Changes:

  7. Irregularities:

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