NOTICE ADVISORY TO GALILEO USERS (NAGU) YYYYNNN
DATE GENERATED (UTC): YYYY-MM-DD hh:mm

NAGU TYPE: EOM_START
NAGU NUMBER: YYYYNNN
NAGU SUBJECT: EXTENDED OPERATION MODE STARTED FROM YYYY-MM-DD 
NAGU REFERENCED TO: N/A
START DATE EVENT (UTC): YYYY-MM-DD hh:mm
END DATE EVENT (UTC): UNTIL FURTHER NOTICE
SATELLITE AFFECTED: ALL

EVENT DESCRIPTION: THE GALILEO SYSTEM HAS ENTERED EXTENDED OPERATION MODE FROM YYYY-MM-DD BEGINNING hh:mm UTC. USERS WILL OBSERVE GRADUAL PERFORMANCE DEGRADATIONS.