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Computer Simulation of a Space-Based Infrared Surveillance Sensor

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Simulation of a Naval Research Laboratory space-based infrared surveillance sensor must include such basic effects as the time-varying geometry of the satellite-to-earth line of sight LOS, atmospheric emission and attenuation, the optical blur of the sensors telescope, and the noise and nonuniform response characteristics of the solid-state detectors. A user- oriented, menu-driven software, package called the End-to-End Simulation Package EESP has been developed to perform the necessary calculations. In addition to generating accurately simulated imagery, it includes a set of signal processing algorithms for finding moving targets. The EESP computation begins with real IR data TIMS 1 and Hi-Camp 2 are the primary sources, accepts user inputs for many parameters e.g., orbital altitude and position of satellite, pixel size, ground and observation point, and ends with target declarations. In between, all effects must be taken into account with sufficient accuracy to give valid results. The simulated sensor is a satellite-borne, scanning, IR radiometer. The satellite is placed in a circular orbit, unrestricted in altitude. The linear focal plane array is mounted in a telescope which, at the users option can either be placed on a gimbal or use an external steering mirror to achieve LOS pointing control. The linear focal plane array consists of 512 detectors arranged vertically and scans horizontally across the scene through 512 pixels pixelresolution element by means of a scan mirror.

Subject Categories:

  • Meteorology
  • Computer Programming and Software
  • Infrared Detection and Detectors
  • Active and Passive Radar Detection and Equipment

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