SUBJ: GPS STATUS 26 FEB 93
1. SATELLITES, PLANES AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : PRNS  3, 11, 12, 13
   PLANE   : SLOT C4, C3, A1, C1
   CLOCK   :      RB, RB, RB, CS
B. BLOCK II: PRNS  1,  2, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27
   PLANE   : SLOT F1, B3, E1, D2, E3, D3, F3, A4, B2, E2, E4, D1, A2, F2, A3
   CLOCK   :      CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, RB, CS, CS, CS
   BLOCK II: PRNS 28, 29
   PLANE   : SLOT C2, F4
   CLOCK   :      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
034-93064 161909Z FEB 93  PRN14    FCST   MAINT       064/1455 UP TO 8 HOURS
044-93076 251421Z FEB 93  PRN18    FCST   MAINT       076/1515 UP TO 8 HOURS
045-93069 252158Z FEB 93  PRN24    FCST   MAINT       069/0230 UP TO 4.5 HRS
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN      TYPE  SUMMARY
035-93050 191830Z FEB 93  PRN25    ADV   UNUSABLE     050/1820 UFN
036-93050 192105Z FEB 93  PRN3     ADV   UNUSABLE     050/1930-050/2045
037-93050 192122Z FEB 93  PRN25    ADV   USABLE       050/2053
038-93053 221425Z FEB 93  PRN12    ADV   UNUSABLE     051/0106-051/0119
039-93053 221426Z FEB 93  PRN3     ADV   UNUSABLE     052/0600-052/0609
040-93053 221427Z FEB 93  SEE NANU ADV   TESTING      051/1700-052/0200
041-93054 231058Z FEB 93  PRN12    ADV   UNUSABLE     054/1017-054/1046
042-93054 232130Z FEB 93  PRN3     ADV   UNUSABLE     054/2034-054/2124
043-93055 241421Z FEB 93  PRN3     ADV   UNUSABLE     055/0137-055/0151
046-93057 261432Z FEB 93  PRN13    ADV   UNUSABLE     057/0704-057/0720
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. 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 Lt Col ROB WORLEY (719)554-2634 OR DSN
692-2634.
4. POINTS OF CONTACT:
A. CIVILIAN: US COAST GUARD AT COMMERCIAL (703)313-5900 VOICE OR
(703)313-5910 COMPUTER BBS.
B. MILITARY: 2SOPS/DOAI 1LT SKINNER AT (719)550-6378/80 OR DSN 560-
6378/80