RFI alert for Feb 2011

Fortunately, A2010 should not be affected by this GPS alert which
announce GPS tests on:
   20110127     AST 0800-1500 no conflict
   20110128     AST 0800-1500 no conflict     
   20110129     AST 1800-2100 no conflict

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================================================================
-------- Original Message --------
Subject: GPS-L3 (1381 MHz)  RFI Alert
Date: Fri, 21 Jan 2011 10:44:55 -0700
From: Dan Mertely 
Organization: NRAO

We have received advanced 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 detailed below.

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:  GPS Satellite Testing Operations.

FREQUENCY AFFECTED:    1381.05 ± 2.5 MHz

DATE (UTC)  TIME (UTC)    Comments
(YYYYMMDD)  (HHMM)-(HHMM) (TEXT)
------------------------------------------------------------
20110127     1200 - 1900   Extended L3 tests, world-wide.
20110128     1200 - 1900   Extended L3 tests, world-wide.
20110129     2200 - 2400   Extended L3 tests, world-wide.
20110130     0000 - 0100   Extended L3 tests, world-wide.
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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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Daniel J. Mertely
National Radio Astronomy Observatory
Interference Protection Office Engineer
P.O. Box o
Socorro,  NM  87801
(575) 835-7128
dmertely@nrao.edu

-Mert
================================================================
================================================================

If you have received above average RFI at 1381 MHz outside of those
scheduled times please let me know & I will have a "talk" with them.
Thanks!

-Mert

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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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# * # * # * # * # * # * # * # * # * # * # * # * # * # * # * # *
Daniel J. (Mert) Mertely
National Radio Astronomy Observatory
Interference Protection Office Engineer
P.O. Box o
Socorro,  NM  87801
(575) 835-7128
dmertely@nrao.edu
nrao-rfi@nrao.edu