Journal of Guangxi Normal University(Natural Science Edition) ›› 2011, Vol. 29 ›› Issue (2): 1-5.

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Comparison of Infrared Radiative Temperatures from Two Scales on Different Land Surfaces

WANG Xiu-xin1, HU Dao-sheng1, ZHU Qi-jiang2   

  1. 1.College of Computer Science and Information Technology,Guangxi Normal University,Guilin Guangxi 541004, China;
    2.State Key Laboratory of Remote Sensing Science,School of Geography,Beijing Normal University, Beijing 100875,China
  • Received:2011-01-16 Published:2018-11-19

Abstract: Infrared radiative temperatures (IRT) land surface ofcould be measured with infrared radiometer on point scale and infrared thermalcamera on area scale.However,it results in errors when average IRT on point scale is used to replace IRT on area scale.Therefore,IRTs on the lawn,bare soil,asphalt road and concrete plaza are measured from 10:00 to 16:30 using both radiometer and thermal camera in clear and sunny days,and are compared.Results show thatit's more suitable for both asphalt road and concrete plaza,suitable for bare soil,but not for lawn as average IRT measured with radiometer replaces IRT with thermal camera.The errors between IRTs on the two scales are minimum on asphalt road and concrete plaza,maximum on lawn,and are much greater with high IRT at noon than that at other moments.The errors are less than 0.5 °C on asphalt road and concrete plaza,not greater than 1.0 °C on bare soil and reach 3.6 °C on lawnat 12:30.

Key words: surface radiative temperature, infrared thermal camera, infrared radiometer, point and area scales, temperature comparison

CLC Number: 

  • O551.2
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