SUBJ: GPS STATUS 12 Mar 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   :      RB, 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, CS, CS, RB
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)
016-97069     141948Z Feb  97   24     FCST         069/2220-   UP TO 12 HOURS
                                       RESCHEDULED
019-97064     211452Z Feb  97   10     FCST MX      064/1230-   UP TO 16 HOURS
020-97065     211920Z Feb  97   10     FCST         065/1230-   UP TO 16 HOURS
                                       RESCHEDULED
022-97070     031621Z Mar  97   27     FCST MX      070/1730-   UP TO 12 HOURS
023-97064     052109Z Mar  97   10     FCST         068/1230-   UP TO 16 HOURS
                                       RESCHEDULED
024-97068     091132Z MAR  97   10     FCSTCANC
025-97072     101656Z Mar  97   22     FCST MX      072/2130-   UP TO 12 HOURS
026-97076     101717Z Mar  97   02     FCST MX      076/0800-   UP TO 12 HOURS
027-97070     110129Z MAR  97   24     FCSTSUMM     069/2302-   070/0030Z
028-97076     111749Z Mar  97   2      FCSTCANC
029-97073     111750Z Mar  97   17     FCST MX      073/1640    UP TO 20 HOURS
B. ADVISORIES:
NANU          MSG DATE/TIME     PRN    TYPE         SUMMARY (JDAY/ZULU TIME START - STOP)
179-96309     041717Z NOV  96   28     UNUSABLE     309/1634-   UNTIL FURTHUR NOTICE
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 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.