A2010: alfa galaxy search
mar05
Intro:
A2010 is doing a fast alfa galaxy search. It takes
100
Mhz around 1384. The telescope is parked at the meridian and drift
scans
are done. Each file takes 600 seconds of data sampled at 1 hz. At the
end
of each of these scans the cal is fired for 1 second and then the next
scan starts. The za is given a small bump at the end of each scan so
that
the position does not drift too far off the J2000 starting position.
General Pages related to a2010.
27sep11:
beam5a dropout on 27sep11
26sep11: 1408
Mhz rfi in alfa data.
15feb11:
5.2 second oscillation in beam 2 from the dewar bias monitoring.
14apr10:
beam 5b jumps (wapp attenuators?)
11apr09:
gps l3 in a2010 data jan0 - mar09
04sep08: gps satellite flies
thru a2010 observation causing birdies at 1346.7
07feb07:
gps l3 test on 06dec06. Looking at the a2010 data.
24feb06:
harmonics created in the alfa/wapp receiver chain.
12may05:
1428 Mhz birdie in alfa 18may05 thru 23may05.
21may05:
pixel 4a still has 174 Khz ripple with amp=.09K.
08apr05:
total power images apr05 show when radar problem occurred.
06apr05:
installing 10db amp before pixel2ab mixer improves Tsys polB.
27mar05:
faa 1350 radar appears at 1380 Mhz in search data.
23mar05
alfa pixel 0b 1430 Mhz wandering birdie (Rf to If converter).
08mar05:
alfa ratio TsysA/TsysB nov04 thru Feb05. A2010 drift probably the north
polar spur.
03mar05:
Power jumps and slow recovery time when hit by FAA radar.
26feb05:
Punta salinas radar does not stay in Mode A
26feb05:
How far from the J2000 position do we move while doing drift scans (in
current coordinates)
Monitoring
alfa stability using ratio of TsysA/TsysB
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