Communications: directive radio wave systems and devices (e.g. – Determining distance
Reexamination Certificate
2007-11-06
2007-11-06
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
C342S145000, C342S146000, C342S126000, C342S133000, C342S139000, C342S140000, C342S141000, C342S156000, C342S149000, C342S153000, C342S052000, C342S054000, C342S053000, C342S056000, C356S003080, C356S004060, C356S139040
Reexamination Certificate
active
11103380
ABSTRACT:
A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two points on the platform in a common time sample; detecting the received radiation and generating a signal representative thereof; and processing the signal. The signal is processed to determine a respective angle to target from two points on the platform by using a correlation between received signal amplitude and respective angle; and determine the range from the platform to the target from the respective angles and the separation distance between said two points in a single signal-to-noise sufficient sample. The apparatus includes a plurality of optical channels through which the apparatus can receive radiation emanating from the target, the optical channels and a plurality of electronics. The optical channels include a windowing system through which the radiation is received; a sensor capable of detecting the received radiation and generating a signal representative thereof; and a light tube between the windowing system and the detector. The electronics are capable of processing the signal in accordance with the method set forth above.
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“Passive Ranging with AN Incoherent Optical System. ” by Dowski, 1993, University of Colorado.
“A Modified Method of Passive Ranging Using Optical Flow of Target Infrared Images. ” by Huang, et al, 2005, The International Society for Optical Engineering.
“Passive Range Measurement Through Wavefront Coding. ” by Lis, 2006, International Society for Optical Engineering.
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Schroeder Wayne K.
Williams Brett A.
Lockheed Martin Corporation
Sotomayor John B.
William, Morgan & Amerson, P.C.
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