NOTICE ADVISORY TO NAVSTAR USERS (NANU) #098-93109
SUBJ: PRN13 USABLE 109/0633
1. CONDITION: PRN13 (SVN13) WAS UNUSABLE ON DAY 109 (19 APR 93)
BEGINNING 0434 UTC UNTIL DAY 109 AT 0633 UTC.
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: CAPT HUTSELL AT COMMERCIAL (719) 550-6378 OR DSN 560-6378.