NOTICE ADVISORY TO NAVSTAR USERS (NANU) #079-91111
SUBJ: PRN15 SCHEDULED OUTAGE DAY 111/2300 FOR UP TO 18 HOURS
1. CONDITION: PRN15 (MCS: SVN 15) IS SCHEDULED TO BE UNAVAILABLE
FOR NAVIGATION/POSITIONING/TIME TRANSFER ON DAY 111 (21 APR91)
BEGINNING APPROXIMATELY 2300 UTC FOR UP TO 18 HOURS. SHOULD THE
OUTAGE EXTEND MORE THAN 30 MINUTES BEYOND THE SCHEDULED WINDOW,
A SUPPLEMENTARY ADVISORY WILL BE ISSUED.
2. RECOMMENDATION: CONFIRM AVAILABILITY OF SATELLITES PRIOR TO USE.
3. POINT OF CONTACT: MAJOR FAUVER AT COMMERCIAL (719)550-6379
OR DSN: 560-6379.