NOTICE ADVISORY TO NAVSTAR USERS (NANU) #015-92034
SUBJ: PRN20 UNUSABLE 034/1506 UNTIL FURTHER NOTICE
1. CONDITION: PRN20 (SVN20) WAS UNUSABLE ON DAY 034 (3 FEB 92)
BEGINNING 1506 AND CONTINUES TO BE UNUSABLE UNTIL FURTHER NOTICE.
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  (719) 550-6379 OR DSN 560-6379.