[evlatests] Venus, Software time May 17

[Vivek Dhawan]

Barry Clark wrote:
> Running Modcomp-free.
> 
> 
> Planetary tracking based on major planet name or on position and derivative
> seem to work.  (I forgot to check whether the planet position shows up
> in the output stream - I put in the code to do so.  Somebody could have
> a look (source names VENUS1 and VENUS2).

Venus does show up correctly labelled in the output.
(I loaded with online FILLM).

The positions in the labels corresponded to a minute or 2 before the
start of the scan, in RA, and were offset by about 12" in DEC.
details below.

There were 2 scans, venus1 and venus2. Phases and amplitudes are flat
across each scan on all VLA-VLA baselines.

EVLA antennas (only 2 survived) had a jump up from venus1 to venus2 in 
amplitude.  Not tracking same position as VLA? EA13,14,16,21,23 should
have produced fringes of good strength, produced no data at all.
17 had data, but no fringes because of long baselines.

Antennas got on-source 4min after the first scan start. Some antennas
had gaps between scan1 and 2, others not. I've skipped the details,
let me know if anyone cares about this part.

V.

  ------------------  AIPS labels (IAT)

File = MOD-FREE    .C BAND.   1 Vol = 1  Userid =   13
Freq =  4.885100000 GHz   Ncor =  4   No. vis =     18944
Scan summary listing

Scan      Source      Qual  Calcode Sub         Timerange          FrqID
    1 VENUS1          : 0000           1  0/20:38:00 -   0/20:52:30     1
    2 VENUS2          : 0000           1  0/20:52:50 -   0/21:01:20     1

Source summary
Velocity type = '        '    Definition = '        '

   ID Source           Qual  Calcode RA(2000.0)     Dec(2000.0)  No. vis
    1 VENUS1          : 0000         06:45:59.3443  25:43:52.384   11046
    2 VENUS2          : 0000         06:46:02.3487  25:43:49.508    7898

----------------------  JPL online ephemeris (UT)
                    http://ssd.jpl.nasa.gov/horizons.cgi#top

  2007-May-17 20:36     06 45 59.3858 +25 43 40.985
  2007-May-17 20:38     06 45 59.7835 +25 43 40.604

  2007-May-17 20:50     06 46 02.1692 +25 43 38.321
  2007-May-17 20:52     06 46 02.5669 +25 43 37.940

----------------------------