Research on image simulation technology of land observation satellite
XU Daqi1, DU Yongming2, LIN Jun1, YANG Guijun3, LIU Qiang2, LIU Qinhuo2, SHEN Zhanfeng2
1. China Centre for Resources Satellite Data and Application, Beijing 100094, China;
2. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China;
3. Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
Satellite image simulation technology aims at simulating the band features, space geometric features, radiation characteristics, ephemeris data and format of the satellite image by the method of computer simulation before the launching of satellites. To study the Landsat image simulation technology,this paper makes a review on the development of China's own satellite remote sensing image simulation system over the past six years,and describes the design of China's image simulation system as well as the key technology. At present, the simulated bands of the system include the bands from visible light, near infrared to thermal infrared band, with the simulated spatial resolution between 3 m to 300 m. In the process of simulation, the authors used the remote sensing radiative transfer model to simulate the spectrum characteristics, employed the PROSPECT+SAIL models to simulate the spectrum of the areas covered by vegetation, and adopted spectral library to simulate the spectrum of the non-vegetation area. Based on linear decomposition of the atmospheric radiative transfer process, the authors set up a look-up table (LUT)of the atmospheric radiative transfer process so as to improve the speed of simulation calculation on the premise of guaranteeing simulation precision significantly. In order to simulate the precise geometry information, the authors used high precision geometric positioning model on the basis of considering the topographic relief, calculated the intersection between the line of sight for satellite observation and the Earth's surface pixel by pixel. Finally, The authors used the observation data after the launching of the satellite and the field measured data in the experimental field to verify the simulation precision of the image simulation technology described in this paper.
徐大琦, 杜永明, 林军, 杨贵军, 刘强, 柳钦火, 沈占锋. 陆地观测卫星图像模拟技术研究[J]. 国土资源遥感, 2015, 27(2): 80-87.
XU Daqi, DU Yongming, LIN Jun, YANG Guijun, LIU Qiang, LIU Qinhuo, SHEN Zhanfeng. Research on image simulation technology of land observation satellite. REMOTE SENSING FOR LAND & RESOURCES, 2015, 27(2): 80-87.
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2015, Vol. 27 
