Henry Adler Deceased155 68Th St, New York, NY 10023

7315280, Jan 1, 2008

May 25, 2004

10/853693

Richard Schiffmiller - Teaneck NJ, US
Henry Adler - New York NY, US
Melvin Carroll - Flushing NY, US

BAE Systems Information and Electronics Systems Integration Inc. - Nashua NH

G01S 1/24

342387, 342442

A coherent TOA system is provided for rapidly ascertaining the position of a pulse train emitter such as a radar. Techniques are provided to estimate the underlying repetition interval of the emitter and to do the TOA processing knowing which of the particular pulses is being detected at a collector, thus surmounting the effect of gaps in the received pulse stream. The subject system is preferable to conventional time-difference-of-arrival geolocation systems which require that each of the collecting platforms measure the same pulse from the emitter, and also to non-coherent TOA systems whose accuracy is less than that achievable with the subject coherent system for the same amount of data.

6933888, Aug 23, 2005

Jun 14, 2004

10/867056

Richard Schiffmiller - Teaneck NJ, US
Henry Adler - New York NY, US
Melvin Carroll - Flushing NY, US

Bae Systems Information and Electronic Systems Integration Inc. - Nashua NH

G01S001/24

342387, 342442

A system is provided for rapidly ascertaining the position of a pulse train emitter such as a radar using multiple collectors without requiring more than one platform to measure the same pulse. Thus time-of-arrival measurements at a number of collecting platforms are performed, with the positions of the platforms being accurately ascertainable using GPS data, and with time synchronization between the spaced-apart collectors performed by utilizing atomic clocks. In the multi-ship case, geolocation can be performed on ten milliseconds of data as opposed to 30 seconds of data for measurements involving a single platform. The subject system is preferable to conventional time-difference-of-arrival geolocation systems because those systems require that each of the collecting platforms measure the same pulse from the emitter, which severely constrains the flight paths of the collectors, limits the amount of usable data, and increases the system's sensitivity requirements.