[evlatests] L-band phase drifts
Rick Perley
rperley at nrao.edu
Wed Oct 28 12:16:45 EDT 2009
The L-band data, which tracks 3C147 continuously for about 6 hours
shows remarkable phase drifts -- completely linear over the time range
-- which are different between RCP and LCP. Using antenna 28 (N8) as
reference, the total phase changes over a 5.5 hour duration are about:
Antenna RCP LCP
----------------------------
2 -150 -410
3 1000 820
4 -60 90
5 360 260
8 60 0
9 420 360
15 300 210
19 430 -35
24 1550 1620
25 0 -90
27 -200 -510
----------------------------------
All subbands appear to have about the same phase rotation.
This is a far larger draft than was seen at 6cm. What's happening here?
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