horizon sensor


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horizon sensor

[hə′rīz·ən ‚sen·sər]
(engineering)
A passive infrared device that detects the thermal discontinuity between the earth and space; used in establishing a stable vertical reference for control of the attitude or orientation of a missile or satellite in space.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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On orbit, three-axis stabilization for horizontal flight, kept the camera axis pointed earthward for image motion compensation while minimizing blur from pitch, roll and yaw using the pitch and roll gyros updated continuously using infrared horizon sensors for determining the vertical to less than 0.1 degree accuracy.
The aircraft navigation algorithm is based on optimal error estimation of the subsystems, such as SINS, GPS receiver, an optical horizon sensor, and a magnetometer.
The optical horizon sensor and magnetometer integration decreases the SINS vertical line analytical modelling errors [DELTA][[phi].sub.x], [DELTA][[phi].sub.y] and the meridian direction estimation error [[DELTA][phi].sub.z] respectively.
To avoid this, Larry Stolarczyk developed the EDIT Horizon Sensor to revolutionize the mining industry with a sensing system that provides real-time analysis of the thickness of coal in the floors and roofs of mines and the locations of dangerous abandoned mines parallel to active ones.
Applications include non-contact temperature measurements such as tympanic thermometers, automobile climate control and occupancy sensing, process temperature monitoring, gas analysis in the medical, automotive, and petroleum industries, hazard control including flame and explosion detection, and horizon sensors for science and space.
These filters are ideal for remote sensing, chemical analysis, astrophysics/astronomy and horizon sensors. Deposition Sciences, Inc.