Moving target indication system
First Claim
1. In a moving target indication system wherein a field of view is repeatedly scanned with detection means, the combination of,means for developing and storing information of said field of view from a first scan,means for developing later information of said field of view from a succeeding scan,means for comparing said later information with said stored information from said first scan, and to indicate any difference therebetween,and means for effecting adjustment of said later information to compensate for any misalignment of said succeeding scan as compared to said first scan.
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Accused Products
Abstract
A system comprising a scanning detector for rapidly scanning a field of view through appropriate optical means, and with a linear infrared detector array, there being electronic apparatus for converting the detector signals to digital signals and for storing such information for comparison with like information from another or many additional scans. The system further includes electronic apparatus for processing such detector signals from a first scan as well as from second or succeeding scans to determine the amount of misalignment between the frames of such scans to develop a correction signal which is applied to adjustment apparatus to correct such misalignment to insure that the frames of succeeding scans are accurately aligned with frames from previous scans.
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Citations
16 Claims
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1. In a moving target indication system wherein a field of view is repeatedly scanned with detection means, the combination of,
means for developing and storing information of said field of view from a first scan, means for developing later information of said field of view from a succeeding scan, means for comparing said later information with said stored information from said first scan, and to indicate any difference therebetween, and means for effecting adjustment of said later information to compensate for any misalignment of said succeeding scan as compared to said first scan.
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12. The method of providing an indication of movement within a given field of view comprising the steps of,
causing field-of-view scanning apparatus to perform a first scan thereof and to determine information accordingly of said field, storing said information from said first scan, causing said scanning apparatus to perform a succeeding scan of said field and to determine information prevailing at the time of said succeeding scan, comparing a predetermined portion of the information from said succeeding scan with the information of the corresponding portion of said first scan and developing therefrom a signal indicating the misalignment of said predetermined portion of said succeeding scan with the corresponding portion of said first scan, and correcting the remaining portion of the information of said succeeding scan so that it can be accurately compared with the corresponding portion of the information from said first scan.
Specification