NOTICE ADVISORY TO NAVSTAR USERS (NANU) #041-91041
SUBJ: PRN6 UNUSABLE DAY 41 0749-0926 UTC
1. CONDITION ON DAY 41 (9 FEB 91):
A. PRN9 (MCS: SVN6) USABLE OVER WESTERN NORTH AMERICA (WNA) AND
PERSIAN GULF AREA (PGA). L-BAND-ON FORECAST FOR THE NEXT SEVEN
DAYS:
DAY DATE      L-BAND-ON WNA   L-BAND-ON PGA
41  10 FEB 91 41/0522-41/0722 41/1737-41/1952
42  11 FEB 91 42/0518-42/0718 42/1733-42/1948
43  12 FEB 91 43/0516-43/0714 43/1729-43/1944
44  13 FEB 91 44/0510-44/0710 44/1725-44/1940
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 47/0458-47/0758 47/1713-47/1928
B. PRN6 (MCS: SVN3) WAS UNUSABLE ON DAY 41 BEGINNING 0749 UTC
UNTIL DAY 41 AT 0926 UTC. L-BAND WILL BE TURNED OFF BETWEEN 0745-
1000 UTC UNTIL FURTHER NOTICE.
2. RECOMMENDATION: PRN6 WILL BE UNUSABLE FOR NAVIGATION OR
POSITIONING DURING THESE OUTAGES. CONFIRM AVAILABILITY OF
SATELLITES PRIOR TO USE.
3. POINT OF CONTACT: MAJ WILLIAM FAUVER AT COMMERCIAL (719)550-
6379 OR AUTOVON 560-6379.