NOTICE ADVISORY TO NAVSTAR USERS (NANU) #018-91019
SUBJ: PRN 3 UNUSABLE 18/2327-18/2339 UTC
1. CONDITION: PRN3 (MCS: SVN11) WAS UNUSABLE ON DAY 18 (18 JAN 91) BEGINNING
2327 UTC UNTIL DAY 18 AT 2339 UTC. MINIMIZE HAS BEEN IMPLEMENTED ON MESSAGE
TRAFFIC. NOTICE ADVISORIES WHICH CONFIRM GPS ALL SINGLE SATELLITE OUTAGES OF
LESS THAN THIRTY MINUTES WILL BE SENT IN A SINGLE MESSAGE ONCE PER DAY.
FORECASTS AND OUTAGES EXPECTED TO EXCEED THIRTY MINUTES WILL CONTINUE TO BE
DISPATCHED AS SOON AS POSSIBLE.
2. RECOMMENDATION: CONFIRM AVAILABILITY OF SATELLITES PRIOR TO USE. THE GPS
RECEIVER IS THE PRIMARY SOURCE OF HEALTH AFND STATUS INFORMATION.
3. POINT OF CONTACT: MAJ WILLIAM FAUVER AT COMMERCIAL
(719)550-6379 OR AUTOVON 560-6379.