SUBJ: GPS STATUS 03 JUL 91
1. SATELLITES, PLANES AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : PRNS  3,  6, 11, 12, 13
   PLANE   : SLOT C4, A3, C3, A1, C1
   CLOCK   :      RB, RB, CS, CS, CS
B. BLOCK II: PRNS  2, 14, 15, 16, 17, 18, 19, 20, 21, 23
   PLANE   : SLOT B3, E1, D2, E3, D3, F3, A4, B2, E2, E4
   CLOCK   :      CS, CS, CS, CS, CS, CS, CS, CS, CS, CS
2. CURRENT ADVISORIES (ADV) AND FORECASTS (FCST):
INFORMATION IS REPEATED FOR SEVEN DAYS AFTER EVENT CONCLUDES.
A. FORECASTS:
NANU      MSG DATE/TIME   PRN    TYPE  SUMMARY
117-91177 202122Z JUN 91  PRN14  FCST  UNUSABLE 177/0600  +12 HRS
119-91177 262023Z JUN 91  BLKII  FCST  SPS REACTIVATION FORECAST
121-91182 011354Z JUL 91  BLKII  FCST  SA ON    182/0400  -UFN
122-91190 021402Z JUL 91  PRN18  FCST  UNUSABLE 190/0500  +12 HRS
123-91183 031415Z JUL 91  PRN6   FCST  L-BAND OFF SCHEDULE
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN    TYPE  SUMMARY
120-91180 011345Z JUL 91  PRN11  ADV   UNUSABLE 180/2058-180/2110
124-91183 021900Z JUL 91  PRN13  ADV   UNUSABLE 183/1538-183/1743
3. REMARKS:
A. REF NANU 123: PRN6 IS USABLE FOR NAVIGATION/POSITIONING/TIME
SOLUTIONS. HOWEVER, L1/L2 BANDS MAY BE TURNED OFF APPROXIMATELY ONE
HOUR PRIOR TO ECLIPSE AND REMAIN OFF FOR UP TO FOUR TO SIX HOURS
AFTER EXITING ECLIPSE. ECLIPSE TIMES FOR THE NEXT FOURTEEN DAYS ARE
PROVIDED IN NANU 123. A WEEKLY ADDENDUM TO THIS LIST WILL BE PROVIDED.
B. REF NANU 121 - SELECTIVE AVAILABILITY WAS REACTIVATED AT STANDARD
POSITIONING SERVICE ACCURACY LEVELS ON DAY 182 (01 JUL 91) AT 0400 UTC.
THE POINT OF CONTACT IS MAJOR JOE WYSOCKI (719)554-5770 OR DSN 692-5770.
C. THE LAUNCH OF PRN24 SCHEDULED FOR 03 JUL 91 WAS DELAYED DUE TO
GROUND EQUIPMENT PROBLEMS. THE LAUNCH IS NOW SCHEDULED FOR NOT EARLIER
THAN 04 JUL 91.
4. POINTS OF CONTACT:
A. CIVILIAN: US COAST GUARD AT COMMERCIAL (703)866-3806 VOICE OR
(703)866-3890 COMPUTER BBS.
B. MILITARY: 2SCS/DOCI MAJ WILLIAM FAUVER AT (719)550-6379 OR DSN
560-6379.