SUBJ: GPS STATUS 19 MAR 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
044-93076 251421Z FEB 93  PRN18    FCST   MAINT       076/1515 UP TO 8 HOURS
054-93085 102115Z MAR 93  PRN25    FCST   MAINT       084/2015 UP TO 4 HOURS
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN      TYPE  SUMMARY
055-93074 151455Z MAR 93  PRN3     ADV   UNUSABLE     072/0500-072/0509
056-93074 151500Z MAR 93  PRN11    ADV   UNUSABLE     072/1415-072/1452
057-93076 172313Z MAR 93  PRN2     ADV   UNUSABLE     076/2228-076/2251
058-93076 172315Z MAR 93  PRN18    ADV   UNUSABLE     076/1515-UFN
059-93077 180621Z MAR 93  PRN18    ADV   UNUSABLE     076/1515-077/0554
060-93077 181850Z MAR 93  PRN3     ADV   UNUSABLE     077/1557-077/1558
061-93077 181856Z MAR 93  PRN3     ADV   UNUSABLE     077/1723-UFN
062-93077 182034Z MAR 93  PRN3     ADV   UNUSABLE     077/1723-077/2032
063-93078 192212Z MAR 93  PRN3     ADV   UNUSABLE     078/2200-078/2210
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