SUBJ: GPS STATUS 21 APR 94
1. SATELLITES, PLANES AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : PRNS 12, 13
   PLANE   : SLOT A1, C1
   CLOCK   :      RB, RB
B. BLOCK II: PRNS  1,  2,  4,  5,  6,  7,  9, 14, 15, 16, 17, 18, 19, 20, 21
   PLANE   : SLOT F1, B3, D4, B4, C1, C4, A1, E1, D2, E3, D3, F3, A4, B2, E2
   CLOCK   :      CS, CS, CS, CS, RB, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS
   BLOCK II: PRNS 22, 23, 24, 25, 26, 27, 28, 29, 31
   PLANE   : SLOT B1, E4, D1, A2, F2, A3, C2, F4, C3
   CLOCK   :      CS, CS, RB, 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
057-94059 141918Z FEB 94  PRN13    FCST   MAINT       059/0000-UFN
113-94104 311509Z MAR 94  PRN24    FCST   MAINT       104/1330-UP TO 24 HOURS
120-94110 061821Z APR 94  PRN9     FCST   MAINT       110/1230-UP TO 12 HOURS
129-94104 122055Z APR 94  PRN3     FCST   DISPOSAL    103/1500
130-94105 122117Z APR 94  PRN6     FCST   MAINT       105/1940-UP TO 72 HOURS
131-94117 131415Z APR 94  PRN14    FCST   MAINT       117/0840-UP TO 12 HOURS
132-94105 131839Z APR 94  PRN6     FCST   MAINT       105/1715-UP TO 72 HOURS
B. ADVISORIES
NANU      MSG DATE/TIME   PRN      TYPE  SUMMARY
133-94104 142219Z APR 94  PRN24    ADV   FCSTSUMM     104/1341-104/1844
134-94104 142225Z APR 94  PRN16    ADV   UNUSABLE     104/0557-104/0558
135-94104 142228Z APR 94  PRN16    ADV   UNUSABLE     104/0749-104/0750
136-94108 181546Z APR 94  PRN6     ADV   FCSTSUMM     106/1408-108/1540
137-94111 211419Z APR 94  PRN09    ADV   FCSTSUMM     110/1248-110/1920
3. REMARKS:
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 CMDR TRICE (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 THOMPSON AT (719)550-6378 OR DSN 560-
6378