bs116b holography of the dish

jun 11 , 2003

Links to the plots:
az,za offsets from 3C454.3 for the 6 patterns.
za position and position sampling interval
the phase vs time and zenith angle.
fit to the phase at the peaks for the 7 patterns versus time.
Initial maps from aips: pat1Amp  pat1Deviations pat2Amp pat2Deviations
Sections:
Introdution
The scanning pattern.
Notes while taking the data.
The phase and amplitude for the hancock,arecibo baseline.


Introdution

     On 11jun03 (4am AST) we scanned 3C454.3 using the vlba recorder and the cband receiver. The radar interface was run at 10 hz sampling of a 5 mhz band while the interim correlator was run with a 25 Mhz band at 10 hz sampling. Two other vlba antennas were also used. After 3C454.3 set  the calibrator J2334+0736 was tracked for awhile.
    The vlba correlator sampled at .13 seconds. There were 7 patterns. Pattern number 4 has arecibo tracking the source the entire time (since we passed through low za for this pattern).


The scanning pattern. (top)

    The routine used the pattern corstarotf . The driving routine was in src.11jun03. Each pattern consisted of The first plots shows the az,za offsets from 3C454.3 for the 6 patterns. The axis are great circle offsets in az,za from the center of the source. Each plot has the positions for the start of the pattern up to the positioning for the start of the next pattern. The circles started at the right of each plot (3 hours on a clock face).

The 2nd set of plots has the za position and position sampling interval:


Notes while taking the data.  (top)


The phase and amplitude for the hancock,arecibo baseline.  (top)

        The first set of plots shows the phase vs time and zenith angle. The second set of plots shows the fit to the phase at the peaks for the 7 patterns versus time.
    processing: x101/030611/vlba/dophcor.pro, phvstmza.pro
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