SUBJ: GPS STATUS 17 Feb 98
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, 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)
98019         292239Z JAN 98    31     FCSTDV       044/0545-044/1745
98021         040006Z FEB 98    26     FCSTMX       049/1650-059/1650
98022         052303Z FEB 98    26     FCSTCANC     049/1650-/
98027         112114Z FEB 98    31     FCSTCANC     044/0545-/
B. ADVISORIES:
NANU          MSG DATE/TIME     PRN    TYPE         SUMMARY (JDAY/ZULU TIME START - STOP)
98020         310102Z JAN 98    13     USABINIT     031/0057-/
98023         091609Z FEB 98    01     UNUSUFN      040/1451-/
98025         100200Z FEB 98    13     UNUSUFN      041/0045-/
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.