NOTICE ADVISORY TO NAVSTAR USERS (NANU) #057-91057
SUBJ: PRN13 UNUSABLE 56/1500-1510 & PRN11 UNUSABLE 57/1118-1152
1. ADVISORLES/FORECASTS FOR DAY 57 (26 FEB 91):
A. PRN13 (MCS: SVN9) WAS UNUSABLE ON DAY 56 (25 FEB 91) BEGINNING
1500 UTC UNTIL DAY 56 AT 1510 UTC.
B. PRN11 (MCS: SVN8) WAS UNUSABLE ON DAY 57 (26 FEB 91) BEGINNING
1118 UTC UNTIL DAY 57 AT 1152 UTC.
C. 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
57  26 FEB 91 57/0420-57/0620 57/1633-57/1848
58  27 FEB 91 58/0416-58/0616 58/1629-58/1844
59  28 FEB 91 59/0412-59/0612 59/1625-59/1840
60  01 MAR 91 60/0408-60/0608 60/1621-60/1836
61  02 MAR 91 61/0404-61/0604 61/1617-61/1832
62  03 MAR 91 62/0400-62/0600 62/1614-62/1828
63  04 MAR 91 63/0356-63/0556 63/1610-63/1824
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.