Sensitivity Analysis of Spectral Band Adjustment Factors For GF-1/WFV Sensor Cross-Calibration

被引:1
作者
Zhou Ke [1 ,2 ,3 ,4 ,6 ]
Liu Li [5 ]
Yu Tao [1 ,2 ,4 ]
Gu Xing-fa [1 ,2 ,4 ]
Zheng Feng-bin [6 ]
Zang Wen-qian [1 ,2 ,4 ]
机构
[1] Chinese Acad Sci, Jointly Sponsored Inst Remote Sensing & Digital E, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China
[2] Beijing Normal Univ, Beijing 100101, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Ctr Natl Spaceborne Demonstrat, Beijing 100101, Peoples R China
[5] China Ctr Resources Satellite Data & Applicat, Beijing 100094, Peoples R China
[6] Henan Univ, Coll Comp & Informat Engn, Kaifeng 475004, Peoples R China
关键词
GF-1; WFV; Cross calibration; Spectral band adjustment factors;
D O I
10.3964/j.issn.1000-0593(2017)12-3809-05
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Affected by the components aging and the space environment changing, the radiation performance of the first satellite GaoFen series (GF-1) changes since it has been launched. The orbit calibration can track the performance changing during the sensor's lifetime. Cross calibration using the high radiometric calibration precision can improve the calibration frequency and accuracy. Spectral band adjustment factors (SBAF) are important factors in cross calibration. Terra/MODIS is selected as reference sensor, GF-1/WFV as target sensor, and the SBAF can be calculated based on the in situ measurement spectral data at Dunhuang radiometric calibration site, considering the observation angle, spectral response, atmospheric conditions and surface properties. Time series cross calibration coefficients can be obtained according to the SBAF. GF-1/WFV apparent radiances are obtained by the cross calibration coefficients, while Terra/MODIS apparent radiances are obtained by the digital number and calibration coefficients. The relative deviations of apparent radiances between the two sensor's are compared by analysis. It shows that SBAF in different bands has same trends; The SBAF above 0. 9 are 53. 1%, 75%, 81. 2%, 93. 8% for blue, green, red, near-infrared bands, respectively; Time series calibration coefficients and SBAF are negatively correlated and the relative deviations of apparent radiances are smaller while the SBAF are closer to 1.
引用
收藏
页码:3809 / 3813
页数:5
相关论文
共 11 条
[11]  
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