SUBJ: GPS STATUS 17 APR 91
1. SATELLITES, PLANES AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : PRNS  3,  6, 11, 12, 13
   PLANE   : SLOT C4, A3, C3, A1, C1
   CLOCK   :      RB, RB, CS, CS, CS
B. BLOCK II: PRNS  2, 14, 15, 16, 17, 18, 19, 20, 21, 23
   PLANE   : SLOT B3, E1, D2, E3, D3, F3, A4, B2, E2, E4
   CLOCK   :      CS, CS, CS, CS, CS, CS, CS, CS, CS, CS
2. CURRENT ADVISORIES (ADV) AND FORECASTS (FCST):
INFORMATION IS REPEATED FOR SEVEN DAYS AFTER EVENT CONCLUDES.
A. LONG TERM:
NANU      MSG DATE/TIME   PRN    TYPE  SUMMARY
079-161504Z APR 91        PRN15  FCST  UNUSABLE 111/2300-112/1700
B. SHORT TERM:
NANU      MSG DATE/TIME   PRN    TYPE  SUMMARY
073-91094 041637Z APR 91  PRN3   FCST  UNUSABLE 101/1015-101/1300
                          PRN23  FCST  UNUSABLE 101/1230-101/1500
076-91100 101640Z APR 91  PRN13  ADV   UNUSABLE 100/0000-100/0030
077-91101 121447Z APR 91  PRN3   ADV   UNUSABLE 101/0214-101/0239
078-91103 151552Z APR 91  PRN6   ADV   UNUSABLE 103/2009-103/2023
3. POINTS OF CONTACT:
A. CIVILIAN: US COAST GUARD AT COMMERCIAL (703)866-3806 VOICE OR
(703)866-3890 COMPUTER BBS.
B. MILITARY: 2SCS/DOS MAJ WILLIAM FAUVER AT COMMERCIAL (719)550-6379
OR DSN 560-6379.