METHOD FOR TRANSMITTING STATUS MESSAGES TO USER TERMINALS OF A SATELLITE DATA LINK SYSTEM, ESPECIALLY IN A SATELLITE NAVIGATION SYSTEM

摘要

The invention relates to a method for transmitting status messages (INTEGRITY) to user terminals of a satellite data link system, especially a satellite navigation system. According to the invention, the status messages are split up into data blocks (1) that are smaller than the data blocks (NAV1, NAV2) of useful data to be transmitted. At least one data block (1) each of the status messages is inserted in subsequent data blocks (NAV1, NAV2) of useful data. When the status messages (INTEGRITY) are modified, a modification message (2) is inserted in subsequent data blocks (NAV1, NAV2) of useful data, replacing one or more data blocks (1) of the status messages.