GPS OPERATIONAL ADVISORY 284
SUBJ: GPS STATUS 11 OCT 2018

1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : NONE
B. BLOCK II: PRNS 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
PLANE : SLOT D2, D1, E1, E3, D4, A4, C3, F3, E2, D5, B4, F6, F5, F2
CLOCK : RB, RB, RB, RB, RB, RB, CS, RB, RB, RB, RB, RB, RB, RB
BLOCK II: PRNS 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
PLANE : SLOT B1, C4, D6, C5, E4, D3, E6, F4, A1, B2, B5, C2, B3, C1
CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, RB, RB, RB
BLOCK II: PRNS 30, 31, 32
PLANE : SLOT A3, A2, F1
CLOCK : RB, RB, 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)

2018041 261741Z SEP 2018 09 FCSTDV 277/0145-277/1345
2018043 040749Z OCT 2018 09 FCSTSUMM 277/0204-277/0746
2018046 101502Z OCT 2018 05 FCSTDV 289/1305-290/0105
B. ADVISORIES:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)

2018044 070834Z OCT 2018 27 UNUSUFN 280/0807-/
2018045 071818Z OCT 2018 27 UNUSABLE 280/0807-280/1813
C. GENERAL:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)

2014038 241350Z APR 2014 GENERAL /-/
2014039 271351Z APR 2014 GENERAL /-/
2017122 272144Z NOV 2017 GENERAL /-/
2018010 052217Z MAR 2018 GENERAL /-/
2018042 032104Z OCT 2018 GENERAL /-/

3. REMARKS:
A. THE POINT OF CONTACT FOR GPS MILITARY OPERATIONAL SUPPORT IS THE GPS
OPERATIONS CENTER AT 719-567-2541 OR DSN 560-2541.
B. CIVILIAN: FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT
COMMERCIAL 703-313-5900 24 HOURS DAILY AND INTERNET
HTTPS://WWW.NAVCEN.USCG.GOV
C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
HTTPS://GPS.AFSPC.AF.MIL/GPS OR HTTPS://GPS.AFSPC.AF.MIL/GPSOC

David Cottle

UBB Owner & Administrator