NOTICE ADVISORY TO NAVSTAR USERS (NANU) #026-91026
SUBJ: PRN6 UNUSABLE 26/0900-26/1030 UTC
1. CONDITION:
A. PRN9 (MCS: SVN6) CONTINUES TO BE SET USABLE IN ALMANAC HEALTH
AND UNUSABLE IN EPHEMERIS HEALTH.
B. PRN6 (MCS: SVN3) WAS UNUSABLE ON DAY 26 (26 JAN 91) BEGINNING
0900 UTC UNTIL DAY 26 AT 1030 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
28  28 JAN 91 28/0845-28/1030
29  29 JAN 91 29/0845-29/1030
30  30 JAN 91 30/0830-30/10L5
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.