摘要
利用Landsat8影像数据对天绘一号卫星多光谱传感器进行交叉定标,选取已有场地定标结果的均匀场,以及两个传感器在该场地的同步观测数据,利用回归分析得到定标公式的增益和偏置;并将结果与历史场地定标结果进行对比,增益的相对误差分别为5.5%、7.1%、7%和4.2%。结果表明,该方法获得的定标系数精度与天绘一号(TH-1)卫星在轨场地定标精度有很好的一致性,达到了业务化运行的定标精度要求。
In this paper,we put forward a radiometric cross-calibration method of TH-1 satellite sensor based on landsat8 data.Firstly,we chose the target place which had historical calibration results,and the synchronous images of two sensors passing through the target place.And then,we used the regression analysis to obtain the gain and bias of the calibration formula.Finally,we contrasted the data and historical calibration results.The gains relative errors of the 4 bands were 5.5%,7.1%,7%and 4.2%respectively.The results show that the calibration coefficients obtained from the method have good coherence with site calibration coefficient value of TH-1,and can satisfy calibration accuracy require of TH-1 professional work.
出处
《地理空间信息》
2018年第11期39-41,125,共4页
Geospatial Information
