SUBJ: GPS STATUS 07 Nov 97 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 9, 10, 14, 15, 16, 17, 18, 19 PLANE : SLOT F1, B3, C2, D4, B4, C1, C4, A1, E3, E1, D2, E5, D3, F3, A4 CLOCK : CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, CS, RB BLOCK II: PRNS 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 PLANE : SLOT E2, B1, E4, D1, A2, F2, A3, C5, F4, B2, C3 CLOCK : CS, CS, CS, RB, CS, CS, CS, 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) 106-97307 211406Z Oct 97 5 FCST DV 307/0400- UP TO 12 HOURS 108-97307 030910Z NOV 97 5 FCSTSUMM 307/0400- 307/0845 109-97321 032018Z Nov 97 10 FCST MX 321/2220 UP TO 12 HOURS B. ADVISORIES: NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP) C. GENERAL: NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP) 38 LAUNCH 061530Z Nov 97 8 LAUNCH 310/0030 UNTIL HEALTHY 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 LTCOL DAVIS (719)554-2634 OR DSN 692-2634. 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 2LT BRIAN BARKER, 2SOPS/DOUAN NAVIGATION ANALYST AT (719)567-6378, DSN 560-6378, OR COMPUTER BBS (719)567-6379.