Achieving sub-pixel geolocation accuracy in support of MODIS land science
Achieving sub-pixel geolocation accuracy in support of MODIS land science
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DOI：
10.1016/s0034-4257(02)00085-8
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发表时间：
2002-11-01
影响因子：
13.5
通讯作者：
Patt, FS
中科院分区：
文献类型：
--
作者：
Wolfe, RE;Nishihama, M;Patt, FS
1999年12月在极轨道Terra航天器上发射了中分辨率成像分光仪，自2000年2月以来，每天都在36个光谱波段获取全球数据-29个波段为1公里，5个波段为500米，2个波段为250米最低点像素尺寸。Terra卫星具有机载外部定向（位置和姿态）测量系统，设计用于使中分辨率成像分光仪数据的地理定位达到最低点约150米（1 Q）。正在使用一个全球地面控制点网络来确定传感器方位的偏差和趋势。自发射以来，通过多次更新中分辨率成像分光仪地理定位软件中的航天器模型和仪器方向，消除了偏差，并将中分辨率成像分光仪地理定位提高到最低点约50米（1西格玛）。本文概述了地理定位方法，总结了第一年的地理定位分析，并概述了未来的工作。该方法允许操作的MODIS地理定位误差的特性，并使个人的MODIS观测地理定位到陆地全球变化应用所需的亚像素精度。(C)2002年爱思唯尔科技有限公司All rights reserved.
The Moderate Resolution Imaging Spectroradiometer (MODIS) was launched in December 1999 on the polar orbiting Terra spacecraft and since February 2000 has been acquiring daily global data in 36 spectral bands-29 with 1 km, five with 500 m, and two with 250 m nadir pixel dimensions. The Terra satellite has on-board exterior orientation (position and attitude) measurement systems designed to enable geolocation of MODIS data to approximately 150 m (1 Q) at nadir. A global network of ground control points is being used to determine biases and trends in the sensor orientation. Biases have been removed by updating models of the spacecraft and instrument orientation in the MODIS geolocation software several times since launch and have improved the MODIS geolocation to approximately 50 m (1sigma) at nadir. This paper overviews the geolocation approach, summarizes the first year of geolocation analysis, and overviews future work. The approach allows an operational characterization of the MODIS geolocation errors and enables individual MODIS observations to be geolocated to the sub-pixel accuracies required for terrestrial global change applications. (C) 2002 Elsevier Science Inc. All rights reserved.