Photon-Counting Laser Altimetry Based on Microchannel Plate

MI Xiaoshi1,2 ZHAO Hui1 FAN Xuewu1 SHENG Lizhi1

(1.Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi, China 710119)
(2.University of Chinese Academy of Sciences, Beijing, China 100049)

【Abstract】Compared with the traditional laser altimetry technology, the photon-counting laser altimetry technology has the advantages of large data size, light weight, and high ranging precision, which is the development trend of laser altimetry technology. In this paper, we establish a mathematical model to study the characteristics of the photon-counting laser altimetry. The performance of the photon-counting laser altimeter is estimated by numerical calculation. The ground object model is established, and the simulation is carried out with Monte Carlo method. A filtering method for the altimetry data and an algorithm for optimizing the topography using the remote-sensing images are proposed. The results show that the root-mean-square error of the photon-counting laser altimeter is 6.1 cm under the condition of the noonday background with the most intense sun for the typical ground object model, and the error after optimization by the algorithm is 2.6 cm.

【Keywords】 measurement; laser altimetry; photon-counting detector; microchannel plate;

【DOI】

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This Article

ISSN:0253-2239

CN: 31-1252/O4

Vol 38, No. 12, Pages 350-360

December 2018

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Article Outline

Abstract

  • 1 Introduction
  • 2 Photon-counting laser altimetry
  • 3 Performance of laser ranging
  • 4 Simulation
  • 5 Conclusions
  • References