| 光谱学与光谱分析 |
|
|
|
|
|
| The Ground Reflectance Spectrum Retrieval from ETM Images |
| 东北师范大学城市与环境科学学院, 吉林 长春 130024 |
| College of Urban and Environmental Sciences, Northeast Normal University, Changchun 130024, China |
|
|
|
|
Abstract Retrieval of ground reflectance spectrum from satellite sensor digital count requires knowledge of the atmospheric conditions. Images of spectral radiance from ground-atmosphere system recorded by the multi-spectral imager ETM which boarded Landsat-7 sensor can retrieve the ground reflectivity spectrum. The uncertainty of reflectance spectrum retrieval is no more than 17% at the band 1 of ETM, and less than 10% at the band 2 and 3 of ETM. It is superior to those arithmetics widely used at present. Retrieval of ground radiance spectrum from ground-atmosphere system can be used to synthesize the sRGB true color image, but the definition is not excellent. And it was proved that the color of the images can not reflect the actual nature of earth objects before being adjusted. And the accuracy of interpretation based on true color synthesized images is superior to those based on the source images. So the precision of such reflectance spectrum retrieval is not as good as expected if applied to the true color photography on the ground.
|
|
Received: 2005-12-02
Accepted: 2006-03-18
|
|
|
|
Corresponding Authors:
CHEN Chun
E-mail: chenC@nenu.edu.cn
|
|
[1] Vermote E, Tanre D, Deuze J, et al. 6S User Guide Version 2, 1997. 14.
[2] TONG Qing-xi(童庆禧). Spectral and Analysis of Typical Earth Objects of China(中国典型地物波谱及其特征分析). Beijing: Science Press(北京：科学出版社), 1990. 274.
[3] WANG Xin-qiang, YANG Shi-zhi, ZHU Yong-hao(王新强，杨世植，朱永豪). Chinese Journal of Quantum Electronics(量子电子学报), 2003, 20(5): 629.
[4] Lgnatov Alexander, Stowe Larry. Journal of the Atmospheric Sciences, 2002, 59(3): 313.
[5] Remer L A, Kaufman Y J, Tanre D. Journal of the Atmospheric Sciences, 2005, 62(4): 947.
[6] LIU Fang, WANG Jun-de(刘 芳，王俊德). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2004, 24(8): 946. |
|
|
|
