NOTICE ADVISORY TO NAVSTAR USERS (NANU) #003-92015
SUBJ: FORECAST OUTAGE PRN19 DAY 015/2230 UTC FOR UP TO 8 HOURS
1. CONDITION: THE MAINTENANCE ACTIVITY ON PRN19 (SVN19) SCHEDULED
FOR DAY 008 (08 JAN 93) AT 1705 UTC FOR UP TO 8 HOURS HAS BEEN
CANCELLED (SEE NANU 331-93009 DTG 231601ZDEC92). THE NEW EVENT TIME
IS AS FOLLOWS. PRN19 (SVN19) IS EXPECTED TO BE UNUSABLE ON DAY 015
(15 JAN 92) BEGINNING 2230 UTC FOR UP TO 8 HOURS DUE TO SCHEDULED
MAINTENANCE. THE HISTORICAL MINIMUM FOR THIS TYPE OF MAINTENANCE IS
5 HOURS.
2. THIS SCHEDULED MAINTENANCE WILL REPOSITION PRN19, USERS ARE
REMINDED TO UPDATE ALMANACS IF NECESSARY.
3. AFFECTED AREAS: GLOBAL EXCEPT FOR EASTERN AFRICA, SOUTHERN ASIA,
TO WESTERN AUSTRALIA.
4. 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.
5. POC: LT. SKINNER AT (719) 550-6378 OR DSN 560-6378.