SUBJ: GPS STATUS 19 JUN 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. FORECASTS: NANU MSG DATE/TIME PRN TYPE SUMMARY 110-91168 121518Z JUN 91 PRN20 FCST UNUSABLE 168/1700-169/0500 112-91168 142020Z JUN 91 PRN20 FCST UNUSABLE 168/1600 +18 HRS 115-91176 191540Z JUN 91 PRN14 FCST UNUSABLE 176/0600 +12 HRS B. ADVISORIES: NANU MSG DATE/TIME PRN TYPE SUMMARY 111-91164 131346Z JUN 91 PRN6 ADV UNUSABLE 164/0445-164/0457 113-91166 171346Z JUN 91 PRN12 ADV UNUSABLE 166/0913-166/0924 114.91170 191447Z JUN 91 PRN6 ADV UNUSABLE 170/1335-170/1401 3. POINTS OF CONTACT: A. CIVILIAN: US COAST GUARD AT COMMERCIAL (703)866-3806 VOICE OR (703)866-3890 COMPUTER BBS. B. MILITARY: 2SCS/DOCI MAJ WILLIAM FAUVER AT (719)550-6379 OR DSN 560-6379.