ASTER geometric performance
ASTER geometric performance
复制标题
DOI：
10.1109/tgrs.2005.849055
复制
发表时间：
2005-12-01
影响因子：
8.2
通讯作者：
Fujisada, H
中科院分区：
文献类型：
--
作者：
Iwasaki, A;Fujisada, H
先进的星载热发射和反射辐射计(ASTER)系统可以获取从可见光到热红外区域的多光谱图像。ASTER系统由三个子系统组成：可见光和近红外(VNIR)、短波红外(SWIR)和热红外(TIR)辐射计。VNIR子系统有一个后视望远镜和一个最低点望远镜。为了从地理定位和手工配准的角度提供高质量的数据产品，开发了一个称为Level-1数据处理的基本程序，用于使用具有交叉轨迹指向功能的四个望远镜获得的图像。在这项工作中，首先描述了几何验证的方法。接下来，从四年的几何性能角度对ASTER数据产品的图像质量进行了评估。子系统内的手写配准精度优于0.1像素，子系统间的配准精度优于0.2像素。这意味着几何数据库的确定是准确的，基于互相关函数的图像匹配方法在业务应用中是有效的。
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 hand-to-hand 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 hand-to-hand 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.