SUBJ: GPS STATUS 15 DEC 92
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  2, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28
   PLANE   : SLOT B3, E1, D2, E3, D3, F3, A4, B2, E2, E4, D1, A2, F2, A3, C2
   CLOCK   :      CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, RB, CS, CS, CS
   BLOCK II: PRNS 32
   PLANE   : SLOT F1
   CLOCK   :      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
308-92352 031945Z DEC 92  PRN28    FCST  MAINT        352/0335-352/1135
317-92350 081438Z DEC 92  PRN11    FCST  L-BAND CYCLE 346/2000-346/0800
322-92006 141528Z JAN 93  PRN12    FCST  MAINT        005/0700-005/1200
B. ADVISORIES:
NANU      MSG DATE/TIME   PRN      TYPE  SUMMARY
314-92343 072330Z DEC 92  PRN15    ADV   LOSS OF LOCK 342/2000-UFN
315-92343 080005Z DEC 92  PRN15    ADV   LOSS OF LOCK 342/2000-342/2300
316-92343 080744Z DEC 92  PRN26    ADV   UNUSABLE     343/0645-343/0707
318-92343 081448Z DEC 92  PRN11    ADV   UNUSABLE     343/1000-343/1010
319-92346 111454Z DEC 92  PRN32    ADV   USABLE       346/1449
320-92346 111629Z DEC 92  PRN13    ADV   UNUSABLE     346/1600-346/1615
321-92347 120919Z DEC 92  PRN11    ADV   UNUSABLE     347/0800-347/0940
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)866-3806 VOICE OR
(703)866-3890 COMPUTER BBS.
B. MILITARY: 2SOPS/DOAI 1LT SKINNER AT (719)550-6378/80 OR DSN 560-
6378/80