SYSTEMS AND METHODS FOR SPACE-BASED DIGITAL SELECTIVE CALLING

摘要

Systems (100) and methods (400) for providing Digital Selective Calling (“DSC”) based services. The methods involve: using Space-Born Maritime (“SBM”) receivers of satellites (104) deployed in space as a satellite constellation to collect and process DSC emergency messages transmitted from DSC transmitters of terrestrial radios; using the satellites to position validate the DSC emergency messages; determining first positions of the DSC transmitters in transit based on geolocation data and time location data respectively assigned by the satellites to the DSC emergency messages; and validating the first positions to more precise second positions based on results of cross-correlations of the geolocation data and time location data with Automatic Identification Systems (“AIS”) data obtained for the DSC transmitters.

主权项

1. A method for providing Digital Selective Calling (“DSC”) based services, comprising:
using Space-Born Maritime (“SBM”) receivers of satellites deployed in space as a satellite constellation to collect and process DSC emergency messages transmitted from DSC transmitters of terrestrial radios; and using the plurality of satellites to position validate the DSC emergency messages at least by
determining first positions of the DSC transmitters in transit based on geolocation data and time location data respectively assigned by the plurality of satellites to the DSC emergency messages, andvalidating the first positions to more precise second positions based on results of cross-correlations of the geolocation data and time location data with Automatic Identification Systems (“AIS”) data obtained for the DSC transmitters.