SUBJ: GPS STATUS 29 APR 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, CS, RB, CS, CS
   BLOCK II: PRNS 28, 29, 22, 31
   PLANE   : SLOT C2, F4, B1, C3
   CLOCK   :      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
086-93112 071927Z APR 93  PRN1     FCST   MAINT       112/0930 UP TO 8 HRS
104-93123 202131Z APR 93  PRN17    FCST   MAINT       123/0050 UP TO 12 HRS
110-93130 261535Z APR 93  PRN12    FCST   MAINT       130/1600 UP TO 5 HRS
111-93131 261540Z APR 93  PRN3     FCST   MAINT       131/1600 UP TO 5 HRS
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN      TYPE  SUMMARY
094-93104 150002Z APR 93  PRN31    ADV   SEE NANU     103/2053-UFN
105-93112 221311Z APR 93  PRN3     ADV   UNUSABLE     112/0846-112/0905
106-93112 221921Z APR 93  PRN1     ADV   USABLE       112/1921
107-93113 231540Z APR 93  PRN11    ADV   UNUSABLE     112/2142-112/2143
108-93114 242330Z APR 93  PRN3     ADV   UNUSABLE     114/2230-114/2320
109-93116 261355Z APR 93  SEE NANU ADV   AS TESTING   109/0000-114/0000
112-93116 262124Z APR 93  PRN3     ADV   UNUSABLE     116/2100-116/2120
113-93117 271600Z APR 93  PRN11    ADV   UNUSABLE     124/0000-UFN
114-93118 281655Z APR 93  PRN31    ADV   SEE NANU     103/2053-UFN
115-93119 291355Z APR 93  PRN11    ADV   UNUSABLE     119/1246-119/1247
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 CAPTAIN HUTSELL AT (719)550-6378/80 OR DSN 560-
6378/80