NOTICE ADVISORY TO NAVSTAR USERS (NANU) #037-91037
SUBJ: PRN6 UNUSABLE DAY 37 0757-0949 UTC
1. CONDITION ON DAY 37 (6 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
37  06 FEB 91 37/0538-37/0738 37/1743-37/2008
38  07 FEB 91 38/0534-38/0734 38/1739-38/2004
39  08 FEB 91 39/0530-39/0730 39/1735-39/2000
40  09 FEB 91 40/0526-40/0726 40/1731-40/1956
41  10 FEB 91 41/0522-41/0722 41/1727-41/1952
42  11 FEB 91 42/0518-42/0718 42/1723-42/1948
43  12 FEB 91 43/0516-43/0714 43/1731-43/1944
B. PRN6 (MCS: SVN3) WAS UNUSABLE ON DAY 37 BEGINNING 0757 UTC UNTIL
DAY 37 AT 0949 UTC. L-BAND WILL BE TURNED OFF BETWEEN 0800-1000 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.