NOTICE ADVISORY TO NAVSTAR USERS (NANU) #055-92092
SUBJ: PRN20 USABLE 092/1152
1. CONDITION: PRN20 (SVN20) WAS UNUSABLE ON DAY 092 (1 APR 92)
BEGINNING 0615 UTC UNTIL DAY 092 AT 1152 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: 1LT INGEGNERI AT COMMERCIAL (719) 550-6379 OR DSN 560-6379.