Subject: [IGSMAIL-3401]: C/A Code on L2 Test (PRN 19)
From: Jim Ray (USNO 202-762-1444) <[email-masked]>
To: [email-masked], [email-masked]
Date: Mon, 02 Jul 2001 11:00:30 EDT

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IGS Electronic Mail      02 Jul 08:01:11 PDT 2001      Message Number 3401
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Author: FGCS/GIAC (forwarded by Jim Ray)

C/A Code on L2 Test (PRN 19)

The Air Force is planning another test for GPS PRN 19.
This test will activate C/A on L2 to test interaction 
with radar systems.  The state of health flag will be
set to "UNHEALTHY" during the test.  This test is not expected 
to be noticed with standard GPS receivers, since such 
equipment should not process data from unhealthy satellites. 

The tests will be conducted July 9-12, 2001, while the
satellite is over CONUS.  Planned test times roughly
span 00:25 through 08:27 UTC on those 4 days.  Test
operations may end early if necessary.

Please note that this test is distinct from the Digital
Distortion Anomaly Test (DDAT).  The review of procedures
for the DDAT is still in progress.  We will post a notice
when we get more information on the DDAT.

[see http://www.ngs.noaa.gov/FGCS/]