22 GHz reference pointing works!

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 gt period 0.7
• DC bias gt 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