NOTICE ADVISORY TO NAVSTAR USERS (NANU) #045-91045
SUBJ: PRN13 UNUSABLE 44/2122-44/2245 UTC
1. CONDITION ON DAY 45 (14 FEB 91):
A. PRN13 (MCS: SVN9)WAS UNUSABLE ON DAY 44 (13 FEB 91) BEGINNING
2122 UTC UNTIL DAY 44 AT 2245 UTC.
B. PRN9 (MCS: SVN6) USABLE OVER WESTERN NORTH AMERICA (WNA) AND
PERSIAN GULF AREA (PGA). L-BAND-ON SEVEN DAY FORECAST:
DAY DATE      L-BAND-ON WNA   L-BAND-ON PGA
45  14 FEB 91 45/0506-45/0706 45/1721-45/1936
46  15 FEB 91 46/0502-46/0702 46/1717-46/1932
47  16 FEB 91 47/0458-47/0658 47/1713-47/1928
48  17 FEB 91 48/0454-48/0654 48/1709-48/1924
49  18 FEB 91 49/0450-49/0650 49/1705-49/1920
50  19 FEB 91 50/0446-50/0646 50/1701-50/1916
51  20 FEB 91 51/0442-51/0642 51/1657-51/1912
C. PRN6 (MCS: SVN3) HAS COMPLETED L-BAND CYCLING DURING ECLIPSE.
2. RECOMMENDATION: CONFIRM AVAILABILITY OF SATELLITES PRIOR TO USE.
3. POINT OF CONTACT: MAJ WILLIAM FAUVER AT COMMERCIAL (719)550-6379
OR AUTOVON 560-6379.