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Proceedings Paper

Retrieval of terrestrial structural characteristics from satellite laser altimeter waveforms
Author(s): Hui Zhou; Song Li
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Paper Abstract

Satellite Laser Altimeter (SLA) mounts on a satellite, emitting a laser pulse that is reflected diffusely on the terrain, and partly return to the platform. The time of flight (TOF) of pulse and the emitter's position and orientation are used for determining terrain height. A new generation of laser altimeters additionally records the shape of the returning pulse. This recorded waveform carries information on the reflecting objects within the pulse diameter. Analysis of waveform is expected to retrieve terrestrial structural characteristics (e.g. slope, layer and reflectivity), besides terrain range. In this paper, a time dependent description of return pulse signal power is derived and terrestrial property is considered. By a nonlinear least square algorithm using suited initial parameter, the waveforms return pulse are modeled as a sum of Gaussian function. We show that terrestrial characteristics can be derived from parameters of Gaussian components - the centroid, width, area and number. The conclusion in this paper provides a theoretical foundation for retrieval of terrestrial structure.

Paper Details

Date Published: 22 February 2008
PDF: 7 pages
Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 662224 (22 February 2008); doi: 10.1117/12.790928
Show Author Affiliations
Hui Zhou, Wuhan Univ. (China)
Song Li, Wuhan Univ. (China)


Published in SPIE Proceedings Vol. 6622:
International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology

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