NOTICE ADVISORY TO NAVSTAR USERS (NANU) #099-91144
SUBJ: OUTAGES: PRN6 143/2359 - 144/0237 AND 144/0730 - 144/0903 UTC
1. CONDITION: THE PRN6 (MCS:SVN3) NAVIGATION SIGNAL (L-BAND) WAS
TURNED OFF ON DAY 143 (23 MAY 91) BEGINNING 2359 UTC UNTIL DAY
144 AT 0237 UTC. A SECOND OUTAGE OCCURED ON DAY 144 BETWEEN 0730
UTC AND 0903 UTC. WHILE THE L-BAND WAS TURNED OFF, PRN6 WAS
UNAVAILABLE TO ALL USERS. ALTHOUGH THIS SERIES OF OUTAGES HAS BEEN
TERMINATED, L-BAND CYCLING ON PRN6 MAY RESUME WITHOUT NOTICE.
2. RECOMMENDATION: CONFIRM AVAILABILITY OF SATELLITES PRIOR TO USE.
3. POINT OF CONTACT: MAJOR FAUVER AT COMMERCIAL (719)550-6379
OR DSN: 560-6379.