ASTER geometric performance
ASTER geometric performance
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DOI：
10.1117/12.450692
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发表时间：
2001-12
影响因子：
8.2
通讯作者：
A. Iwasaki;H. Fujisada
中科院分区：
文献类型：
--
作者：
A. Iwasaki;H. Fujisada
高级星载热发射和反射辐射计系统获取从可见光到热红外区域的多光谱图像。ASTER系统由三个分系统组成：可见光和近红外辐射计、短波红外辐射计和热红外辐射计。VNIR子系统有一个后视望远镜和一个最低点望远镜。为了从地理定位和波段间配准性能的角度提供高质量的数据产品，已经为使用具有交叉跟踪指向功能的四台望远镜获得的图像开发了一个称为第一级数据处理的基本程序。在这项工作中，首先描述的几何验证的方法。其次，鉴于四年期间的几何性能，评估ASTER数据产品的图像质量。子系统内的带间配准精度优于0.1个像素，子系统间的配准精度优于0.2个像素。这意味着几何数据库的确定是准确的，并且基于互相关函数的图像匹配方法在操作使用中是有效的。
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) system acquires multispectral images ranging from the visible to thermal infrared region. The ASTER system consists of three subsystems: visible and near-infrared (VNIR), short-wave infrared (SWIR) and thermal infrared (TIR) radiometers. The VNIR subsystem has a backward-viewing telescope as well as a nadir one. To deliver data products of high quality from the viewpoint of geolocation and band-to-band registration performance, a fundamental program, called Level-1 data processing, has been developed for images obtained using four telescopes with a cross-track pointing function. In this work, the methodology of the geometric validation is first described. Next, the image quality of ASTER data products is evaluated in view of the geometric performance over a period of four years. The band-to-band registration accuracy in the subsystem is better than 0.1 pixels and that between subsystems is better than 0.2 pixels. This means that the geometric database is determined accurately and the image matching method based on a cross-correlation function is effective in the operational usage.