18 August 1998 Analysis of sounding effect of scanning laser in airborne Earth positioning
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Abstract
In airborne earth positioning and terrain mapping, scanning laser ranging plays an important role. It uses pulse laser range finder and its scanning beam to measure the distance between the sampled ground site and the flying platform along each laser beam pointing. The laser sounding effect determines ranging reliability and operation height. But under the condition of dynamic scanning sounding, there would be no complete overlap between the receiving field of view and the radiating laser beam. This directly leads to lower power sounding effect and finally limits effective operation height. In this paper the rule of the dynamic sounding effect is analyzed in detail and the mathematics expression of the dynamic overlap factor of the laser beam and receiving field of view is obtained. The conclusion opens out the effect of every affecting factor on the dynamic overlap factor, which includes laser beam divergence, instantaneous receiving field of view, scanning speed, operation height and scanning beam obliquity. Some technical methods are discussed to obtain larger dynamic overlap factor.
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Yihua Hu, Yihua Hu, Hui Shao, Hui Shao, Yongqi Xue, Yongqi Xue, } "Analysis of sounding effect of scanning laser in airborne Earth positioning", Proc. SPIE 3505, Imaging System Technology for Remote Sensing, (18 August 1998); doi: 10.1117/12.317839; https://doi.org/10.1117/12.317839
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