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Sam Wormley · Guest

Ref: http://WWW.SCHRIEVER.AF.MIL/GPS/Current/current.nnu?
http://WWW.SCHRIEVER.AF.MIL/GPS/Current/current.oa1?
http://www.navcen.uscg.gov/gps/geninfo/NANUabbr.htm

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2004145
SUBJ: SVN51 (PRN20) FORECAST OUTAGE SUMMARY JDAY 351/0509 - JDAY 351/1143
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2004145
NANU DTG: 161143Z DEC 2004
REFERENCE NANU: 2004139
REF NANU DTG: 091523Z DEC 2004
SVN: 51
PRN: 20
START JDAY: 351
START TIME ZULU: 0509
START CALENDAR DATE: 16 DEC 2004
STOP JDAY: 351
STOP TIME ZULU: 1143
STOP CALENDAR DATE: 16 DEC 2004

2. CONDITION: GPS SATELLITE SVN51 (PRN20) WAS UNUSABLE ON JDAY 351
(16 DEC 2004) BEGINNING 0509 ZULU UNTIL JDAY 351 (16 DEC 2004)
ENDING 1143 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV
MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541,
COMM 719-567-2110, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS
MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276-9994,
COMM 805-606-9994, V3SPACEAF.AOC@VANDENBERG.AF.MIL

UNCLASSIFIED
GPS OPERATIONAL ADVISORY 351.OA1
SUBJ: GPS STATUS 16 DEC 2004

1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : NONE
B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15
PLANE : SLOT F6, D7, C2, D4, B4, C1, C4, A3, A1, E3, D2, F3, F1, D5
CLOCK : CS, RB, CS, RB, CS, RB, RB, CS, CS, CS, RB, RB, RB, CS
BLOCK II: PRNS 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
PLANE : SLOT B1, D6, E4, C3, E1, D3, E2, F4, D1, A2, F2, A4, B3, F5
CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, CS, CS, RB, RB, RB, RB
BLOCK II: PRNS 30, 31
PLANE : SLOT B2, C5
CLOCK : RB, RB
2. CURRENT ADVISORIES AND FORECASTS :
A. FORECASTS: FOR SEVEN DAYS AFTER EVENT CONCLUDES.
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)

2004124 222345Z NOV 2004 29 FCSTDV 335/0500-335/1700
2004126 241522Z NOV 2004 02 FCSTDV 336/1830-339/1830
2004127 242117Z NOV 2004 29 FCSTCANC 335/0500-/
2004133 032031Z DEC 2004 29 FCSTDV 345/0430-345/1630
2004134 040410Z DEC 2004 02 FCSTSUMM 336/1830-339/0409
2004137 071541Z DEC 2004 30 FCSTDV 349/1615-350/0415
2004139 091523Z DEC 2004 20 FCSTDV 351/0445-351/1645
2004140 101016Z DEC 2004 29 FCSTSUMM 345/0500-345/1009
2004143 142101Z DEC 2004 06 FCSTMX 356/1900-357/0700
2004144 150136Z DEC 2004 30 FCSTSUMM 349/1615-350/0129
2004145 161143Z DEC 2004 20 FCSTSUMM 351/0509-351/1143
B. ADVISORIES:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)

2004128 011802Z DEC 2004 31 UNUSUFN 336/1741-/
2004129 011802Z DEC 2004 31 UNUSUFN 336/1741-/
2004131 020115Z DEC 2004 31 UNUSABLE 336/1739-337/0111
2004136 060341Z DEC 2004 02 UNUSUFN 341/0339-/
2004138 090059Z DEC 2004 02 UNUSABLE 341/0339-344/0052
2004141 110014Z DEC 2004 31 UNUSUFN 345/2323-/
2004142 132127Z DEC 2004 31 UNUSABLE 345/2323-348/2120
C. GENERAL:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)

2004130 011820Z DEC 2004 GENERAL /-/
2004132 020138Z DEC 2004 GENERAL /-/
2004135 040435Z DEC 2004 GENERAL /-/
3. REMARKS:
A. THE POINT OF CONTACT FOR GPS MILITARY OPERATIONAL SUPPORT IS THE GPS
SUPPORT CENTER AT (719)567-2541 OR DSN 560-2541.
B. CIVILIAN: FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT
COMMERCIAL (703)313-5900 24 HOURS DAILY AND INTERNET
HTTP://WWW.NAVCEN.USCG.GOV
C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
HTTP://WWW.SCHRIEVER.AF.MIL/GPS OR HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER

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