SUBJ: GPS STATUS 20 MAR 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, CS, RB, CS
B. BLOCK II: PRNS  2, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25
   PLANE   : SLOT B3, E1, D2, E3, D3, F3, A4, B2, E2, E4, D1  A2
   CLOCK   :      CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS  RB
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
028-92081 261647Z FEB 92  PRN25  FCST  USABLE NET  081
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN    TYPE  SUMMARY
039-92074 161428Z MAR 92  PRN12  ADV   UNUSABLE 074/0200-074/0214
040-92076 162327Z MAR 92  PRN6   ADV   UNUSABLE 076/2300-076/2315
041-92079 181643Z MAR 92  PRN13  ADV   UNUSABLE 077/1951-077/1952
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.
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 INGEGNERI AT (719)550-6380 OR DSN 560-6380