NOTICE ADVISORY TO NAVSTAR USERS (NANU) #044-93076
SUBJ: FORECAST OUTAGE PRN18 DAY 076/1515 UTC FOR UP TO 8 HOURS
1. CONDITION: PRN18 (SVN18) IS EXPECTED TO BE UNUSABLE ON DAY
076 (17 MAR 93) BEGINNING 1515 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 PRN18. USERS ARE
REMINDED TO UPDATE ALMANACS IF NECESSARY.
3. AFFECTED AREAS: GLOBAL OVER THE 8 HOUR OUTAGE EXCEPT FOR SOUTHERN
EUROPE, SOUTHWEST ASIA, AND AFRICA.
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.