SUBJ: GPS STATUS 14 May 1998 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, PLANE : SLOT F1, B3, C2, D4, B4, C1, C4, A5, A1, E3, F5, E1, D2, E5, CLOCK : CS, CS, CS, CS, CS, CS, CS, RB, CS, CS, RB, CS, CS, CS, BLOCK II: PRNS 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31 PLANE : SLOT D3, F3, A4, E2, B1, E4, D1, A2, F2, A3, F4, B2, C3 CLOCK : CS, CS, RB, CS, CS, CS, RB, CS, RB, CS, RB, CS, CS 2. CURRENT ADVISORIES AND FORECASTS : A. FORECASTS: FOR SEVEN DAYS AFTER EVENT CONCLUDES. NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP) 1998061 282138Z APR 1998 17 FCSTMX 131/1250-132/0050 1998062 282142Z APR 1998 13 FCSTMX 132/0700-133/0100 1998065 012123Z MAY 1998 13 FCSTDV 127/2030-128/0830 1998070 062218Z MAY 1998 13 FCSTCANC 132/0700-/ 1998071 062219Z MAY 1998 13 FCSTCANC 127/2030-/ 1998073 081825Z MAY 1998 02 FCSTMX 139/1950-140/0750 1998074 081827Z MAY 1998 23 FCSTMX 146/2150-147/0950 1998075 111504Z MAY 1998 17 FCSTSUMM 131/1332-131/1431 1998076 122121Z MAY 1998 07 FCSTMX 138/1315-139/0130 B. ADVISORIES: NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP) 1998066 020038Z MAY 1998 13 UNUSUFN 122/0020-/ 1998072 080426Z MAY 1998 13 UNUSABLE 122/0020-128/0418 C. GENERAL: NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP) 3. REMARKS: A. ANTI-SPOOF WAS DEACTIVATED ON JDAY 033 (02 FEB 97) AT OOOOZ. ANTI-SPOOF WAS REACTIVATED ON JDAY 055 (24 FEB 97) AT 0000Z. 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 LEVELS. THE POINT OF CONTACT IS CMDR BROOMFIELD (719)554-5770 OR DSN 692-5770. C. CIVILIAN: FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT COMMERCIAL (703)313-5900 24 HOURS DAILY, COMPUTER BBS (703)313-5910, AND INTERNET HTTP://WWW.NAVCEN.USCG.MIL OR FTP://FTP.NAVCEN.USCG.MIL. D. MILITARY: FOR INFORMATION, CONTACT 1LT BRIAN BARKER, 2SOPS/DOAN NAVIGATION ANALYST AT (719)567-6378, DSN 560-6378, OR INTERNET HTTP://WWW.FAFB.AF.MIL/GPS.