| Title |
利用Hyperion数据进行环境星HSI红边参数真实性检验 |
| Year |
2010 |
| Authors |
蒙继华，吴炳方，钮立明，杜鑫，陈雪洋，张飞飞 |
| English Authors |
Meng Jihua, Wu Bingfang, Niu Liming, Du Xin, Chen Xueyang, Zhang Feifei |
| Keywords |
环境星HSI；红边参数；真实性检验；Hyperion |
| English Keywords |
HJ-1 HSI; Red edge indices; Validation; Hyperion |
| Journal Link |
www.gpxygpfx.com |
| PDF |
2014520151321891.pdf |
| Abstract |
针对我国新发射运行的HJ-1A星HSI数据，利用高光谱分辨率的Hyperion数据进行了HJ一1A星
HSI的光谱模拟，提取了红谷位置、红边位置、红边斜率和红边振幅等4个主要的红边参数，对真实与模拟环境星HSI数据的红边参数进行了对比分析，从而以Hyperion数据为参照检验了环境星HSI红边参数的真实性。研究结果显示，环境星HSI与模拟HSI的红边范围光谱反射率平均相关系数为0.946，标准差为0.011，为极显著相关，两种数据在红边范围内的光谱反射率变化高度一致；4个红边参数的相关系数分别为0.414，0.543，0.808和0.802，并且随植被覆盖度的变化旱现出明湿的规律性，模拟与真实红边参数差值标准差分别为5.75，1.86，5.7e-4和0.024，认为环境星HSI的红边参数可以较好反映该Ⅸ域植被变化所造成的红边光谱特征差异。 |
| English Abstract |
To validate the HJ-1A HSI red edge indices，spectral reflectance data from EO-1 Hyperion of close date were used to simulate the band reflectance of HJ-1A HSI．Four red edge indices(red vale position，red edge position，red edge slop and red edge swing)were extracted from both simulated and actual HJ-1A HSI band reflectance．Comparisons of the 4 red edge indices between simulated and actual HJ-1A HSl were made to validate the red edge indices product of HJ-1A HSL The average correlation coefficient of red edge reflectance between actual and simulated HJ-1A HSI is 0.946 and its standard deviation is 0.011，thus a high consistency could be found．The correlation coefficients of red edge indices between simulated and actual HJ-1A HSl were 0.414，0.543，0.808 and 0.802 for red edge position，red vale position，the red edge swing and red edge slop respectively． An obvious regular varying trend was found for these 4 red edge indices along different vegetation cover fraction．The standard deviations of differential images between real and simulated HJ-1A HSI red edge indices are 5.75，1.86，5.7 e-4and 0.024．The result showed that the red edge indices from HJ-1A HSI is consistent with that from simulated indices from Hyperion；the vegetation variation could be effectively reflected in HJ-1 A HSI red edge indices． |
