Detection method of messages of type 'Automatic Identification System' for monitoring of vessels and buoys by satellite.

摘要

The method involves providing digital data representing signals i.e. radio navigation signals (24), received by a satellite i.e. global navigation satellite system (GNSS) satellite (20), on an automatic identification system (AIS) channel. A candidate message in the digital data is identified by correlating the data with a hypothetical fragmentary message, where the fragmentary message has an AIS message fragment, which is dependent on transmission time and/or transmitter position and is determined with assistance of a database of AIS transmitters. An independent claim is also included for a computer program product comprising a data medium comprising a set of instructions to cause a computer to execute a method for detecting AIS messages.