SUBJ: GPS STATUS 17 JUN 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, 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,  7
   PLANE   : SLOT C2, F4, B1, C3, C4
   CLOCK   :      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
160-93172 071837Z JUN 93  PRN18    FCST  MAINT        172/0820-UP TO 15 HRS
162-93162 092225Z JUN 93  PRN31    FCST  MAINT        162/1400-UP TO 9 HRS
168-93167 142014Z JUN 93  PRN31    FCST  MAINT        167/0615-UP TO 3 HRS
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN      TYPE  SUMMARY
154-93182 011700Z JUN 93  ALL      ADV   LEAP SECOND  181/2359
157-93155 042127Z JUN 93  PRN31    ADV   SEE NANU     103/2053-UFN
163-93163 121747Z JUN 93  PRN7     ADV   USABLE       163/1615
164-93164 131622Z JUN 93  PRN3     ADV   UNUSABLE     164/1200-UFN
165-93164 131930Z JUN 93  PRN3     ADV   UNUSABLE     164/1115-164/1840
166-93165 141418Z JUN 93  PRN3     ADV   UNUSABLE     163/0759-163/0812
167-93165 141421Z JUN 93  PRN12    ADV   UNUSABLE     163/1132-163/1145
169-93166 151318Z JUN 93  PRN12    ADV   UNUSABLE     165/1900-165/1915
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