RFI alert for Dec 2012

From: Dan Mertely 

We have received notice from the US Space Command (USSC),
Colorado Springs, CO, informing the RA community of
upcoming, extended L3 test transmissions.  The observatories
should expect increased RFI @ 1381 MHz during the dates &
times indicated below.  These transmissions are part of their
regularly scheduled, (quarterly) system tests.

VLA & VLBA schedulers should attempt to schedule 1381 MHz use
around these times if possible.  Observing scientists should
be made aware of the increased possibility of corrupted data
on these dates and times.  VLA and VLBA operators should note
unusual L-band Tsys or total power fluctuations observed during
these times in the Operator Log forwarded to observers.

Please contact me for coordination should any of these dates
and times conflict with planned radio astronomy observations.

-Mert


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GPS-L3 ALERT SCHEDULE:
============================================================
SUBJECT:  Quarterly GPS Satellite Testing Operations.

FREQUENCY AFFECTED:    1381.05 ± 2.5 MHz

DATE (UTC)  TIME (UTC)    Comments
(YYYYMMDD)  (HHMM)-(HHMM) (TEXT)
------------------------------------------------------------
20121204     2000 - 2400   Extended L3 tests, world-wide.
20121205     0000 - 0400   Extended L3 tests, world-wide.

20121205     2000 - 2400   Extended L3 tests, world-wide. (backup
20121206     0000 - 0400   Extended L3 tests, world-wide. (backup

20121206     2000 - 2400   Extended L3 tests, world-wide. (backup
20121207     0000 - 0400   Extended L3 tests, world-wide. (backup
================================================================