利用飞行方向像坐标误差修正的卫星影像立体定位  

Stereo Positioning of High-resolution Satellite Imagery by Correcting Image Coordinates in the Flight Direction

作　　者：龚辉[1] Gong Hui(Xi＇an Research Institute of Surveying and Mapping, Xi＇an China, 710054)

机构地区：[1]西安测绘研究所,陕西西安710054

出　　处：《测绘科学与工程》2018年第1期26-32,共7页Geomatics Science and Engineering

摘　　要：高精度定位是遥感影像几何处理和地理空间信息获取的基础，是利用高分辨率卫星遥感影像测制各种比例尺地形图的基本保障。本文通过对高分辨率卫星遥感影像的成像几何模型进行分析，建立了利用随影像附带的里历姿态数据进行直接立体定位的模型，初步探讨了星历姿态数据与成像时间可能存在的同步性误差，并提出了一种通过修正影像飞行方向像坐标来提高卫星遥感影像立体定位几何精度的方法。利用实际的卫星影像进行了实验验证，结果表明利用控制点修正飞行方向像坐标误差后，显著提高了高分辨率卫星遥感影像的直接对地立体定位精度。High-precision positioning is the basis for remote sensing image geometry processing and geospatial information obtaining, and provides support for making topographic maps at different scales with high-resolution satellite imagery. Based on the analysis of rigorous geometric model of high-resolution satellite imagery, a direct positioning model is established using ephemeris and attitude data attached to images. The synchronization error between the ephemeris/attitude data and imaging time is discussed, and a method is proposed to improve the stereo positioning precision of high-resolution satellite imagery by correcting image coordinates in the flight direction. Actual imagery is used to conduct experiments and results show that the precision can be improved significantly using the method with ground control points.

关 键 词：高分辨率卫星遥感影像 严格几何模型 飞行方向像坐标 直接定位 

分 类 号：P236[天文地球—摄影测量与遥感]