SUBJ: GPS STATUS 23 AUG 93
1. SATELLITES, PLANES AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : PRNS  3, 12, 13
   PLANE   : SLOT C4, A1, C1
   CLOCK   :      RB, RB, CS
B. BLOCK II: PRNS  1,  2,  7,  9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
   PLANE   : SLOT F1, B3, C4, A1, E1, D2, E3, D3, F3, A4, B2, E2, B1, E4, D1
   CLOCK   :      CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS
   BLOCK II: PRNS 25, 26, 27, 28, 29, 31
   PLANE   : SLOT A2, F2, A3, C2, F4, C3
   CLOCK   :      RB, 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
241-93235 111352Z AUG 93  PRN25    FCST   MAINT       235/1550-UP TO 18 HRS
245-93239 131721Z AUG 93  PRN02    FCST   MAINT       239/1100-UP TO 12 HRS
251-93244 191840Z AUG 93  PRN12    FCST   MAINT       244/1230-UP TO 08 HRS
252-93245 191841Z AUG 93  PRN03    FCST   MAINT       245/1800-UP TO 08 HRS
257-93243 201426Z AUG 93  PRN2  FCST/CHNG MAINT       243/1045-UP TO 12 HRS
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN      TYPE  SUMMARY
246-93228 161346Z AUG 93  PRN3     ADV   UNASABLE     227/0348-227/0400
247-93228 161350Z AUG 93  PRN3     ADV   UNUSABLE     227/2207-227/2208
248-93228 161351Z AUG 93  PRN3     ADV   UNUSABLE     228/1200-228/1211
249-93229 171336Z AUG 93  PRN3     ADV   UNUSABLE     228/2300-228/2309
250-93231 191347Z AUG 93  PRN12    ADV   UNUSABLE     231/0848-231/0849
253-93232 200946Z AUG 93  PRN31    ADV   UNUSABLE     232/0815-UFN
254-93232 201123Z AUG 93  PRN03    ADV   UNUSABLE     232/0945-UFN
255-93232 201255Z AUG 93  PRN03    ADV   UNUSABLE     232/0945-232/1255
256-93232 201312Z AUG 93  PRN31    ADV   UNUSABLE     232/0815-232/1220
258-93232 201614Z AUG 93  PRN18    ADV   ASACTVTY     232/0800-232/1000
259-93234 221111Z AUG 93  PRN3     ADV   UNUSABLE     234/1055-UFN
260-93234 221217Z AUG 93  PRN3     ADV   UNUSABLE     234/1055-234/1215
261-93235 231341Z AUG 93  PRN3     ADV   UNUSABLE     233/0752-233/0805
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 THOMPSON AT (719)550-6378 OR DSN 560-
6378