Computer Science
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977stin...7729481c&link_type=abstract
Unknown
Computer Science
Data Recording, Digital Systems, Infrared Detectors, Thermal Emission, Computer Techniques, Infrared Imagery, Minicomputers, Real Time Operation
Scientific paper
A direct, real time, video to digital data recording system has been developed to record 10 micrometers thermal imagery in conjunction with an AGA 680 LW camera. This device is now being used to study the thermal characteristics of various types of natural terrain for the purpose of developing tactical target acquisition techniques. This data recording system consists of an analog to digital interface, NOVA 2/10 minicomputer, and magnetic tape transport and is designed to record 16 frames per second at a 175 kHz instantaneous digitization rate with 8 bit precision. Computer controlled timing circuits group pairs of 8 bit data words into a single 16 bit NOVA compatible word in an intermediate buffer which is then transferred into core memory. The minicomputer stores complete frames of data during the active camera scan period while simultaneously maintaining a constant 88,000 word/second transfer rate to the 9 track magnetic tape unit. The final data format consists of a 74 X 74 picture element array with 0.2 C temperature resolution and 50 C dynamic range.
Cordova R. J.
Parenti Ronald R.
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