NOTICE ADVISORY TO NAVSTAR USERS (NANU) #012-91011
SUBJ: PRN 23 USABLE 11/1850 FOLLOWING REPOSITIONING WITH HIGH URAS
1. CONDITION: REF NANU #007-91007 PRN23 (MCS: SVN 23) WAS USABLE
ON DAY 11 (11 JAN 91) AT 1850 UTC FOLLOWING A STATION-KEEPING
MANEUVER. NAVIGATION/POSITIONING SOLUTIONS ARE VALID ALTHOUGH
USER RANGE ACCURACY ESTIMATES BROADCAST BY PRN23 ARE HIGH.
2. RECOMMENDATION: ALMANAC DATA FOR PRN23 SHOULD BE UPDATED. USE
PRN23 WITH CAUTION.