RFI alert for Sep 2012

Subject: GPS-L3 (1381 MHz)  RFI Alert
Date: Wed, 29 Aug 2012 08:07:01 -0600
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.

-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)
------------------------------------------------------------
20120911     1900 - 2400   Extended L3 tests, world-wide.     15h00 AST to 01h00 AST
20120912     0000 - 0500   Extended L3 tests, world-wide.

20120912     1900 - 2400   Extended L3 tests, world-wide.     15h00 AST to 01h00 AST
20120913     0000 - 0500   Extended L3 tests, world-wide.

20120913     1900 - 2400   Extended L3 tests, world-wide. (backup) 15h00 AST to 01h00 AST
20120914     0000 - 0500   Extended L3 tests, world-wide. (backup)
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From the clear, high deserts of central New Mexico, The Land of
Enchantment, the VLA, and dark, dark, starry, starry nights ...
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