NOTICE ADVISORY TO NAVSTAR USERS (NANU) #030-91030
SUBJ: PRN6 UNUSABLE 30/0827-30/1027 UTC
1. CONDITION DAY 30 (30 JAN 91):
A. PRN9 (MCS: SVN6) CONTINUES TO BE SET USABLE IN ALMANAC HEALTH
AND UNUSABLE IN EPHEMERIS HEALTH. PRN9 WAS USABLE FOR NAVIGATION
ON DAY 30 FROM 0010 UTC UNTIL DAY 30 AT 0813 UTC.
B. PRN6 (MCS: SVN3) WAS UNUSABLE ON DAY 30 BEGINNING 0827 UTC UNTIL
DAY 30 AT 1027 UTC. THE L-BAND OF PRN6 WILL BE DISABLED AS BELOW:
DAY DATE      UNUSABLE (UTC)  ACTUAL (UTC)
20  20 JAN 91 20/0900-20/1045 20/0907-20/1112
21  21 JAN 91 21/0900-21/1045 21/0901-21/1043
22  22 JAN 91 22/0900-22/1045 22/0901-22/1043
23  23 JAN 91 23/0900-23/1045 23/0855-23/1040
24  24 JAN 91 24/0900-24/1045 24/0847-24/1045
25  25 JAN 91 25/0900-25/1045 25/0849-25/1031
26  26 JAN 91 26/0845-26/1030 26/0900-26/1030
27  27 JAN 91 27/0845-27/1030 27/0845/27/1032
28  28 JAN 91 28/0845-28/1030 28/0840-28/1019
29  29 JAN 91 29/0845-29/1030 29/0839-29/1027
30  30 JAN 91 30/0830-30/1015 30/0827-30/1027
31  31 JAN 91 31/0830-31/1015
32  01 FEB 91 32/0830-32/1015
33  02 FEB 91 33/0815-33/1000
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.