n94-25499 - nasa...n94-25499 f simulation of a passive millimeter wave sensor i /_i __) william w....
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N94- 25499
Simulation of a Passive Millimeter Wave Sensor i /_i __)
William W. Kahlbaum /_. /,_
Lockheed Engineering and Science Corporation
ABSTRACT
The visual display expected to be generated by a Passive Millimeter Wave (PMMW)
camera and sensor system has been simulated on a Silicon Graphics IRIS workstation at
the NASA Langley Research Center (LaRC). The low resolution of the sensor has been
simulated by graphically manipulating the scene as it is being drawn by the IRIS in real
time. Camera field of view, sensor resolution, and sensor update rate are the con-
trollable parameters. Physical effects such as lens model, radome effects, and noise
have not been included at this time. An approximate dynamic model of the atmo-
spheric phenomenology has been included which generates the gray-scale intensity
values in real time for the simulated image. The gray-scale values are proportional to
temperature. A snapshot capability which captures individual image frames during
real-time operation has been included. These images were used to validate the approx-
imate phenomenology model against a more rigorous physical model.
163
https://ntrs.nasa.gov/search.jsp?R=19940021007 2020-05-06T13:07:56+00:00Z
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