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Proceedings Paper

A high-precision earth sensor with three separated FOVs for aircraft application
Author(s): Hongjian Wang; Fei Xing; Peirong Fan; Chong Wang; Zheng You
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Paper Abstract

The earth sensors are currently used in spacecrafts. Most of them with a single field of view (FOV) for earth observation are not applied to aircrafts in the atmosphere. For the use of the aircraft at 70 ~ 100km in the atmosphere, this paper proposes a separate triple-FOV earth sensor based on infrared detectors. By sensing the earth-horizon, the triple-FOV earth sensor obtains the geocentric vector, and calculates the altitude of the aircraft at the same time. The earth sensor uses three pieces of infrared detectors at 14 ~ 16μm. To sense the infrared light could ensure that the earth sensor does the same operation at night and day regardless of the weather and the light impact of the sun and the moon. The optical axes of the three fields of view are positioned at 120° from each other in the horizontal plane, and the angle between the optical axes and the vertical direction is 82.86°. Considering the model of the surface of the earth’s atmosphere, the earth's radius and so on, the mathematical model of the triple-FOV earth sensor is established. From 70km to 100km, the result of simulation shows that the altitude measurement accuracy is better than 100m and the angle measurement error is 3.8". The earth sensor can provide high-precision position information, and make data fusion with additional sensors to achieve autonomous navigation of aircrafts.

Paper Details

Date Published: 21 August 2013
PDF: 9 pages
Proc. SPIE 8908, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications, 89081V (21 August 2013); doi: 10.1117/12.2034608
Show Author Affiliations
Hongjian Wang, Tsinghua Univ. (China)
Fei Xing, Tsinghua Univ. (China)
Peirong Fan, Tsinghua Univ. (China)
Chong Wang, Tsinghua Univ. (China)
Zheng You, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 8908:
International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications
Jun Ohta; Nanjian Wu; Binqiao Li, Editor(s)

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