US 12,352,869 B2
Satellite automatic identification system (AIS) for determining actual spoofing maritime vessels and associated geographic spoof sizes and related methods
Edward R. Beadle, Melbourne, FL (US); and Steven R. Heuser, Palm Bay, FL (US)
Assigned to EAGLE TECHNOLOGY, LLC, Melbourne, FL (US)
Filed by Eagle Technology, LLC, Melbourne, FL (US)
Filed on Mar. 17, 2022, as Appl. No. 17/655,195.
Prior Publication US 2023/0296784 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 19/21 (2010.01); H04B 7/19 (2006.01)
CPC G01S 19/215 (2013.01) [H04B 7/19 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A satellite Automatic Identification System (AIS) for tracking a plurality of maritime vessels, the AIS comprising:
a ground AIS server; and
a constellation of Low-Earth Orbit (LEO) satellites in communication with the ground AIS server, each LEO satellite comprising an AIS payload configured to
receive AIS messages from the plurality of maritime vessels and determine therefrom reported vessel position data,
determine actual signal arrival measurements for the AIS messages, and
determine a potential spoofing maritime vessel based upon the reported vessel position data and actual signal arrival measurements;
the ground AIS server configured to determine an actual spoofing maritime vessel and associated geographic spoof size based upon the reported vessel position data and actual signal arrival measurements for the potential spoofing maritime vessel.