DocumentCode :
3534952
Title :
Reflectance-based calibration of Beijing-1 micro-satellite
Author :
Chen, Zhengchao ; Zhang, Bing ; Zhang, Xiaoyong ; Zhang, Hao ; Li, Junseng
Author_Institution :
Center for Earth Obsercation & Digital Earth, Chinese Acad. of Sci., Beijing, China
Volume :
3
fYear :
2009
fDate :
12-17 July 2009
Abstract :
To fulfill the objectives of Beijing-1 micro-satellite on-orbit calibration experiment, two in-flight calibration experiments were carried out on September 3 and 13, 2008 at Dunhuang Calibration Site. Two simultaneous datasets including Beijing-1 data and the in-situ surface reflectance and atmospheric measurements, were acquired at the calibration area. During the period of the calibration experiments, some dark sea images were captured to calculate the dark current of Biejing-1. With the reflectance of calibration targets, the atmospheric optical depths, and the water vapor constraints, the 6S radiative transfer code was used to calculate the equivalent radiance of Beijing-1 to the top of the atmosphere (TOA). The reflectance calibration algorithm was taken to calculate the absolute radiometric calibration coefficients of Beijing-1 multi-spectral cameras. The calibration results of Sep. 3 and that of Sep. 13 are very similar. The biggest relative error between the two results is only 3.77%. This proves the calibration results are reasonable.
Keywords :
artificial satellites; calibration; geophysical equipment; geophysical techniques; remote sensing; AD 2008 09 03; AD 2008 09 13; Beijing-1 microsatellite; Dunhuang Calibration Site; absolute radiometric calibration coefficient; atmospheric measurement; atmospheric optical depth; dark current; dark sea images; in-situ surface reflectance measurement; multispectral camera; on-orbit calibration experiment; radiative transfer; reflectance-based calibration; top of the atmosphere radiance; water vapor constraint; Atmospheric measurements; Calibration; Cameras; Dark current; Geoscience; High-resolution imaging; Multispectral imaging; Optical imaging; Reflectivity; Sea surface; Beijing-1; calibration; reflectance-based;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-3394-0
Electronic_ISBN :
978-1-4244-3395-7
Type :
conf
DOI :
10.1109/IGARSS.2009.5417751
Filename :
5417751
Link To Document :
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