UNITED STATES NAVAL OBSERVATORY (USNO)

              LATEST ANNOUNCEMENTS OF GPS SATELLITE OUTAGES 
  
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      This file is updated as frequently as new information becomes
      available.  Entries are retained for at least 24 hours.

      The references to JDAY or DAY used in the Notice Advisory to 
      Navstar Users (NANU) by the Master Control Station should be 
      understood to mean the day of year (DOY) that begins at 0000 UT. 
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                No new GPS outages to report at this time.
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For current outages and scheduled events, check the following:
    on the WWW, click on Constellation Status, Planned & Recent Outages
                at http://tycho.usno.navy.mil/gps_datafiles.html
  

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                                                    File              Last updated
Constellation status  . . . . . . . . . . . . . . . gpstd.txt . . . . . 07 JAN 09
GPS system explanation  . . . . . . . . . . . . . . gpssy.txt . . . . . 21 JUL 08
Block II/IIA/IIR/IIR-M constellation information  . gpsb2.txt . . . . . 07 JAN 09
Current constellation information . . . . . . . . . gpssat.txt  . . . . 07 JAN 09
GPS Time Transfer performance . . . . . . . . . . . gpstt.txt . . . . . 03 JAN 06
List of 2009 NANUs  . . . . . . . . . . . . . . . . gpsnanu2009.txt . . 07 JAN 09


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File gps.txt
last updated 
Thu Jan  8 11:00:07 UTC 2009