NOTICE ADVISORY TO NAVSTAR USERS (NANU) #008-92033
SUBJ: FORECAST: PRN6 ECLIPSE OUTAGE SCHEDULE
1. CONDITION: PRN6 (SVN 3) IS EXPECTED TO BE UNAVAILABLE (L1/L2 OFF)
BEGINNING DAY 364 (30 DEC 91) UNTIL DAY 033 (2 FEB 92) FOR TWO DAILY
PERIODS OF UP TO SEVEN HOURS EACH.
A. PRN6 WILL BE SET UNAVAILABLE 30 MINUTES PRIOR TO THE ECLIPSE
TIMES LISTED BELOW AND SHOULD RETURN TO SERVICE WITHIN FOR TO SIX
HOURS AFTER EXITING ECLIPSE DEPENDING ON THE CONDITION OF THE
VEHICLE. THE FOLLOWING IS A LIST OF PRN6 ECLIPSE TIMES:
24 JAN 92 DAY 024 0532-0622 AND 1731-1820 UTC
25 JAN 92 DAY 025 0530-0619 AND 1729-1817 UTC
26 JAN 92 DAY 026 0528-0615 AND 1727-1813 UTC
27 JAN 92 DAY 027 0526-0611 AND 1726-1809 UTC
28 JAN 92 DAY 028 0525-0606 AND 1724-1804 UTC
29 JAN 92 DAY 029 0524-0602 AND 1723-1800 UTC
30 JAN 92 DAY 030 0523-0559 AND 1723-1755 UTC
31 JAN 92 DAY 031 0522-0552 AND 1722-1750 UTC
 1 FEB 92 DAY 032 0523-0547 AND 1723-1743 UTC
 2 FEB 92 DAY 033 0524-0539 AND 1727-1735 UTC
B. ON DAY 033 PRN6 WILL HAVE COMPLETED THE ECLIPSE SEASON. THIS IS
THE LAST NANU CONTAINING L1/L2 CYCLING TIMES FOR PRN6.
2. USERS OF GPS ARE CAUTIONED THAT THE SYSTEM IS NOT YET FULLY
OPERATIONAL. SIGNAL AVAILABILITY AND ACCURACY ARE SUBJECT TO CHANGE
DUE TO AN INCOMPLETE CONSTELLATION AND OPERATIONAL TEST ACTIVITIES.
3. POC: 1LT INGEGNERI AT COMMERCIAL (719) 550-6379 OR DSN 560-6379.