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

NAGU TYPE: USABINIT
NAGU NUMBER: YYYYNNN
NAGU SUBJECT: [PARTIALLY or empty_space] USABLE AS FROM YYYY-MM-DD
NAGU REFERENCED TO: YYYYRRR
START DATE EVENT (UTC): YYYY-MM-DD hh:mm
END DATE EVENT (UTC): N/A
SATELLITE AFFECTED: GSATXXXX
SPACE VEHICLE ID: SVID
SIGNAL(S) AFFECTED: [E1, E5a, E5b, E6-B, E6-C or ALL]

EVENT DESCRIPTION: GALILEO SATELLITE GSATXXXX ([E1, E5a, E5b, E6-B, E6-C or ALL] [SIGNAL or SIGNALS]) IS USABLE SINCE/AS OF YYYY-MM-DD BEGINNING hh:mm UTC. GSATXXXX IS POSITIONED IN SLOT SLOT_X OF THE CONSTELLATION. PAYLOAD ON [PHM or RAFS] CLOCK.