Accession Number : ADA258568


Title :   TREND Field Test Report.


Descriptive Note : Technical rept.


Corporate Author : RIVERSIDE RESEARCH INST NEW YORK


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258568.pdf


Report Date : 23 Nov 1992


Pagination or Media Count : 55


Abstract : This report describes work carried out, leading up to and including the final ground based field test of the Testbed for Realistic Evaluation of Novel Discriminants (TREND) electro-optical system. The ultimate goal of this system is to provide a means of passive discrimination between moving objects and a stationary cluttered background by virtue of signal source angular velocity separation. Angular velocity may be inferred by signal frequency on a single periodically masked detector as the source moves across its field of view. The signal amplitude must vary sufficiently over an angular subtense equal to half the mask period to register above the local noise. Such signals may arise from point objects (with respect to half the mask period) or hard edges perpendicular to the mask period. An additional twist to this method, utilized in the TREND sensor, optically filters selected spatial frequencies by dividing the wavefront at the aperture, transmitting radiation through a double slit.


Descriptors :   *ELECTROOPTICS , *FIELD TESTS , *OPTICAL FILTERS , STATIONARY , GROUND BASED , DISCRIMINATION


Subject Categories : Electrooptical and Optoelectronic Devices


Distribution Statement : APPROVED FOR PUBLIC RELEASE