SUBJ: GPS STATUS 05 MAY 92
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, RB, RB, CS
B. BLOCK II: PRNS  2, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 28
   PLANE   : SLOT B3, E1, D2, E3, D3, F3, A4, B2, E2, E4, D1  A2, C2
   CLOCK   :      CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS  RB, 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
121-91182 011354Z JUL 91  BLKII  FCST  SA ON    182/0400- UFN
080-92125 271115Z APR 92  PRN2   FCST  SCH/MAIN 125/1535- 8HRS
081-92124 271933Z APR 92  PRN12  FCST  UNUSABLE 124/1130-125/0030
                          PRN23  FCST  UNUSABLE 124/1130-125/0030
090-92128 301442Z APR 92  PRN24  FCST  SCH/MAIN 128/0315- UT 8HRS
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN    TYPE  SUMMARY
084-92120 291428Z APR 92  PRN6   ADV   UNUSABLE 120/0949-120/1014
085-92120 291434Z APR 92  PRN11  ADV   UNUSABLE 120/1052-120/1105
086-92120 291651Z APR 92  PRN6   ADV   DEGRADED 120/0500-120/1000
087-92120 - PLEASE DISREGARD
088-92120 291916Z APR 92  PRN6   ADV   UNUSABLE 120/1715- UFN
089-92121 301426Z APR 92  PRN3   ADV   UNUSABLE 120/1317-120/1330
091-92122 011423Z MAY 92  PRN3   ADV   UNUSABLE 122/1048-122/1101
092-92125 040200Z MAY 92  PRN3   ADV   UNUSABLE 125/0100-125/0140
093-92125 041455Z MAY 92  PRN3   ADV   UNUSABLE 123/1418-123/1430
3. REMARKS:
A. USERS OF GPS ARE CAUTIONED THAT THE SYSTEM IS NOT YET FULLY
OPERATIONAL. SIGNAL AVAILABILITY AND ACCURACY ARE SUBJECT TO
CHANGE DUE TO AN INCOMPLETE CONSTELLATION AND OPERATIONAL TEST
ACTIVITIES.
B. REF NANU 121 - SELECTIVE AVAILABILITY WAS REACTIVATED AT STANDARD
POSITIONING SERVICE ACCURACY LEVELS ON DAY 182 (01 JUL 91) AT 0400
UTC. VARIATIONS MAY BE SEEN IN THE EFFECT OF SA DURING TESTING, BUT
THE EFFECT SHOULD NOT EXCEED STANDARD POSITIONING SERVICE LEVELS.
THE POINT OF CONTACT IS MAJ ROB WORLEY (719)554-2634 OR DSN
692-2634.
C. P-CODE WAS UNAVAILABLE BEGINNING DAY 084 (24 MAR 92) AT 2300 UTC
UNTIL DAY 085 AT 0100 UTC, AGAIN ON DAY 085 AT 2300 UTC UNTIL DAY
086 AT 0100 UTC, AND AGAIN ON DAY 086 AT 2300 UNTIL DAY 087 (27
MAR 92) AT 0100 UTC. THROUGHOUT THIS TIME STANDARD POSITIONING
SERVICE WAS AVAILABLE USING C/A-CODE THROUGHOUT THESE TIMES.
4. POINTS OF CONTACT:
A. CIVILIAN: US COAST GUARD AT COMMERCIAL (703)866-3806 VOICE OR
(703)866-3890 COMPUTER BBS.
B. MILITARY: 2SOPS/DOAI 1LT SKINNER AT (719)550-6378/80 OR DSN 560-
6378/80