Dead reckoning-based analysis of fabricated maritime data

A method comprising:

• obtaining location-reporting signals of a maritime vessel, wherein the location-reporting signals comprise respective sets of geographical coordinates, each of which having a timestamp;
• determining an initial location of the maritime vessel;
• determining speed and heading information using the location-reporting signals;
• computing estimated location of the maritime vessel at a time, wherein said computing is performed based on the initial location and based on the speed and heading information;
• comparing the estimated location with a reported location at the time according to the one or more location-reporting signals;
• determining that the location-reporting signals are at least partially fabricated, wherein said determining that the one or more location-reporting signals are at least partially fabricated is based on said comparing;
• wherein said determining the initial location, said determining the speed and heading information, said computing the estimated location and said comparing are performed with respect to a first and second location-reporting signals and with respect to a set of location-reporting signals that comprise the first and second location-reporting signals, whereby at least three different dead reckoning estimations are performed, two of which are performed with respect to a single location-reporting signal, and one of which is performed with respect to the set of location-reporting signals;
• and
• in response to said determining that the location-reporting signals are at least partially fabricated, instructing a sensor to obtain a new reading at a location associated with the at least partially fabricated location-reporting signals to validate or refute the determination that the location-reporting signals are at least partially fabricated.

A method comprising:

• obtaining location-reporting signals of a maritime vessel, wherein the location-reporting signals comprise respective sets of geographical coordinates, each of which having a timestamp;
• determining an initial location of the maritime vessel;
• determining speed and heading information using the location-reporting signals;
• computing estimated location of the maritime vessel at a time, wherein said computing is performed based on the initial location and based on the speed and heading information;
• comparing the estimated location with a reported location at the time according to the one or more location-reporting signals;
• determining that the location-reporting signals are at least partially fabricated, wherein said determining that the one or more location-reporting signals are at least partially fabricated is based on said comparing, wherein said determining that the one or more location-reporting signals are at least partially fabricated is further based on a computed distance between a predicted true path and a reported path in accordance with the location-reporting signals, wherein the predicted true path is determined based on one or more reception polygons of reception stations that received the location-reporting signals of the maritime vessel;
• and
• in response to said determining that the location-reporting signals are at least partially fabricated, instructing a sensor to obtain a new reading at a location associated with the at least partially fabricated location-reporting signals to validate or refute the determination that the location-reporting signals are at least partially fabricated.

A non-transitory computer readable medium retaining instructions, which instructions, when read by a processor, cause the processor to perform:

• obtaining location-reporting signals of a maritime vessel, wherein the location-reporting signals comprise respective sets of geographical coordinates, each of which having a timestamp;
• determining an initial location of the maritime vessel;
• determining speed and heading information using the location-reporting signals;
• computing estimated location of the maritime vessel at a time, wherein said computing is performed based on the initial location and based on the speed and heading information;
• comparing the estimated location with a reported location at the time according to the one or more location-reporting signals;
• determining that the location-reporting signals are at least partially fabricated, wherein said determining that the one or more location-reporting signals are at least partially fabricated is based on said comparing, wherein said determining that the one or more location-reporting signals are at least partially fabricated is further based on a computed distance between a predicted true path and a reported path in accordance with the location-reporting signals, wherein the predicted true path is determined based on one or more reception polygons of reception stations that received the location-reporting signals of the maritime vessel;
• and
• in response to said determining that the location-reporting signals are at least partially fabricated, performing a responsive action, wherein the responsive action comprises instructing a sensor to obtain a new reading at a location associated with the at least partially fabricated location-reporting signals to validate or refute the determination that the location-reporting signals are at least partially fabricated.

A system comprising:

• a processor;
• and
• a memory coupled to said processor;
• wherein said processor is configured to perform:
• obtaining location-reporting signals of a maritime vessel to be retained in said memory, wherein the location-reporting signals comprise respective sets of geographical coordinates, each of which having a timestamp;
• determining an initial location of the maritime vessel;
• determining speed and heading information using the location-reporting signals;
• computing estimated location of the maritime vessel at a time, wherein said computing is performed based on the initial location and based on the speed and heading information;
• comparing the estimated location with a reported location at the time according to the one or more location-reporting signals;
• determining that the location-reporting signals are at least partially fabricated, wherein said determining that the one or more location-reporting signals are at least partially fabricated is based on said comparing;
• wherein said determining the initial location, said determining the speed and heading information, said computing the estimated location and said comparing are performed with respect to a first and second location-reporting signals and with respect to a set of location-reporting signals that comprise the first and second location-reporting signals, whereby at least three different dead reckoning estimations are performed, two of which are performed with respect to a single location-reporting signal, and one of which is performed with respect to the set of location-reporting signals;
• and
• in response to said determining that the location-reporting signals are at least partially fabricated, performing a responsive action, wherein the responsive action comprises instructing a sensor to obtain a new reading at a location associated with the at least partially fabricated location-reporting signals to validate or refute the determination that the location-reporting signals are at least partially fabricated.