[evlatests] priority list

[Mark McKinnon]

All,

As promised, I developed a list of prioritized tasks from the
problems identifed in testing of EVLA antennas. The list,
appended below, was derived primarily from the EVLA gotchas
documented at http://www.aoc.nrao.edu/~bclark/evla-gotchas.html.
Gene has incorporated this list in the most recent copy of the
Monday morning coordination summary, with the highest priority
items in boldface. I'll add additional items as they are
identified.

Rick: I listed your name next to tasks that require testing by a
       scientist but with the assumption that you might distribute
       them to other scientists on staff.

Mark


         Issue                                        Priority   Name     Need Date
---------------------------------------------------  --------  --------  ---------
Fix antenna drive into limits problem                    1     Whiteis    2-13-06
Eliminate phase jump with frequency change, L302         1     Luce       2-28-06
Implement reference pointing                             1     Butler     2-28-06
Implement M302/M303 software functionality, MIB          1     Ben Frej   3-09-06
Implement M302/M303 software functionality, GUI          1     Moeser     3-09-06
Improve TP detectors for auto level setting (hardware)   1     Newton     3-17-06
Improve TP detectors for auto level setting (software)   1     Sahr       4-03-06
Modcomps retired                                         1     Sahr      12-29-06


Install P-band receivers, 4/P converter                  2     Cotter  2-01/21-06
Test focus/rotation change with elevation                2     Perley     2-13-06
Verify single-scan fringe loss                           2     Perley     3-27-06
Implement automatic level setting                        2 Sowinski/Brisken 4-17-06
Solve feed moisture condensation problem                 2   Ruff/Hayward 6-05-06
Investigate probable error in Tsys measurement           2     Sowinski   6-05-06
Include current weather data for pointing                2     Clark      6-19-06
Implement tipping curves for opacity determination       2     Butler    10-16-06
Refine bad data flagging                                 2     Butler      ???

Document Doppler tracking workaround                     3     Claussen   2-13-06
Implement feed heater control, M302                      3  Gerrard/Koski 3-01-06
Implement use of round-trip monitor data, L352/353       3     Morris     3-15-06
Determine polarization properties of L-band feed         3   Moellenbrock 3-27-06
Test use of B1950 coordinates                            3     Perley     4-24-06
Implement antenna autophasing                            3     Clark      6-05-06
Write SNOW program to prevent snow accumulation          3     Butler    11-13-06
Provide capability for moving source observation         3     Clark     12-18-06


Notes:

   1. On-line Doppler tracking is fixed when Modcomps are retired.
      In the meantime, need to communicate workaround to community.
   2. SNOW program requires current weather information.
   3. Possible that error in Tsys measurement can't be addressed until
      TP detectors improved.
   4. M302/M303 (utility) software functionality is a safety issue. Needed
      before antenna 24 can be operated.
   5. Investigation underway into anomalous MIB reset (Sahr).