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Revealing of major factors in the directional thermal radiation of ground objects

A new way for improving the precision of directional radiant temperature measuring and data analysis
  • Renhua Zhang
  • Xiaomin Sun
  • Zhaoliang Li
  • M. P. Stoll
  • Hongbo Su
  • Xinzhai Tang
Article

Abstract

This paper is devoted to eliminating the noise from the measuring of directional thermal radiation for ground objects. Specifically, we think that the noise is mainly due to the variance of components in the field of view of the sensor with the view angle changing and to the heat balance change on the ground during the period of measurement. The authors present two new observation methods named as “constant area method by thermal camera” and “concurrent method by dual sensors” respectively. The experiments show that the data obtained by these methods abide by some regularly directional distribution, which is totally different from the data from the former methods. The analysis of the major factors in the directionality of thermal radiation is also made in the paper.

Keywords

radiant temperature directionality constant area method by thermal camera concurrent method by dual sensors 

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Copyright information

© Science in China Press 2000

Authors and Affiliations

  • Renhua Zhang
    • 1
  • Xiaomin Sun
    • 1
  • Zhaoliang Li
    • 2
  • M. P. Stoll
    • 2
  • Hongbo Su
    • 1
  • Xinzhai Tang
    • 1
  1. 1.Institute of GeographyChinese Academy of SciencesBeijingChina
  2. 2.Laboratoire des Sciences de I’Imagede I’Informatique et de la TeledetectionIllkrichFrance

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