SUBJ: GPS STATUS 09 MAY 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 144-94123 281437Z APR 94 PRN18 FCST MAINT 123/1230-UP TO 12 HOURS 147-94126 022056Z MAY 94 PRN18 FCST MAINT 126/1225-UP TO 12 HOURS B. ADVISORIES NANU MSG DATE/TIME PRN TYPE SUMMARY 145-94122 021356Z MAY 94 PRN12 ADV UNUSABLE 121/0623-121/0635 146-94122 021400Z MAY 94 PRN12 ADV UNUSABLE 122/0619-122/0635 148-94125 051354Z MAY 94 PRN12 ADV UNUSABLE 125/0543-125/0550 149-94129 091357Z MAY 94 PRN18 ADV FCSTSUMM 126/1303-126/2112 150-94129 091405Z MAY 94 PRN12 ADV UNUSABLE 126/1800-126/1809 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 JAMES AT (719)550-6378 OR DSN 560- 6378