PTCS RUN for September 13, 2007
Note: Data taken from Sep 3, 2007 through noon Sep 20, 2007 have the Antenna manager bug which causes the OBSC_EL column in the Antenna FITS file to be uncorrected for refraction.
see results below
Observing Notes
7:45pm EDT (Sept 12) : Kevin started up the schedule.
Using X-band receiver at 9.0 GHz. Standard PTCS X-band setup with bandwidth=320 MHz.
Started with project=TPTCSPNT_70913, scan num=4200
schedule = PointingRunV3
Kevin got the active surface and dynamic correction turned on
after the first peak/focus sequence. i.e., after scan 4205.
Zernickes turned on during scan 4215.
-- project TPTCSPNT_70913 : scans 4200-4218.
8:15pm EDT (00:15 UT) Sep 13. I came in a little late.
Changed the project name to TPTCSPNT_070913;
I changed to 3-source peaks at 00:20 UT using schedule=triplePeak,
starting on 3C48 at about 9 degrees elevation, scan number 4224.
Repeated 3C48 (0137+3309) a few times to get the low elevations.
A couple of problems with the LPCs not updating, on scans 4237 and 4218.
Mark is looking at the problem.
The 3 sources are 0137+3309, 0119+3210, and 0038+4137.
0038+4137 is only 1K, so I changed it to a stronger source, 0136+4751
Sky is clear, Temp ~ 9C, wind calm.
Weather just about perfect. Zenith Opacity at 9 GHz about 0.01.
No further problems.
Cumulus starting to appear in the morning.
-- project TPTCSPNT_070913 : Scan numbers 4219 to 4817.
8:00 AM - Program finished, and the GBT maintenance starts.
Summary of Results : TPTCSPNT_070913, Sept 13, 2007
This was a 12 hour session from about 8PM to 8AM, with just about perfect clear weather
and no wind.
Repeated peak/focus was done on 3 sources close to each other:
3C48 (a flux calibrator, aka 0137+3309), 0119+3210 and 0136+4751.
These data will be useful both for deriving a gain curve as well as for pointing calibration.
Observing was at 9.0 GHz with a bandwidth of 320 MHz, using the DCR.
- These data have been added to the ascii database files in /home/groups/ptcs/data/pntdata/
The observations covered most of the possible range of azimuth and elevation,
as shown in Figure 1.
- Figure 1. Az/EL coverage, Sept 13.:
The plots of LPCs vs Az and El, shown in Figure 2, show interesting correlations that
are not so obvious in the all-sky pointing runs.
- Figure 2: LPCs vs Az and El for Sept 13.:
-- FrankGhigo - 13 Sep 2007
