双基高比线面阵结合立体测绘几何模型的构建

Building of Geometric Processing Model Based on Double Baseline with Combination of Linear and Area Array Sensor Stereo Photogrammetric Mode

目前,中国1︰5 000大比例尺航天立体测绘及城市测绘能力存在不足,现有光学测绘卫星的性能指标和测绘体制难以满足大比例尺立体测图的需求,亟需开展甚高精度航天立体测绘新体制研究。文章提出双基高比线面阵结合测绘新体制,以解决在城市等复杂地物目标测绘中存在的遮挡、畸变和辐射差异等问题。以共线条件方程为基础,分析面阵相机和线阵相机的成像机制,给出顾及像点特性的各类系统误差模型,引入各类附加观测值,建立双基高比线面阵结合立体测绘的传感器严格几何成像模型,并基于仿真影像进行双基高比线面阵结合定位精度分析,验证了成像模型的正确性,可为实现1︰5 000比例尺甚高精度航天立体测绘提供一种新思路和解决途径。

Aiming at the lack of the system of 1︰5 000 scale space stereo mapping and the shortage of surveying capability of urban area, in view of the performance and the surveying systems of the existing domestic optical mapping satellites unable to meet the demand of the large scale stereo mapping, it is urgent to develop a very high accuracy space photogrammetric satellite system which has a 1︰5 000 scale（or larger）. A new surveying systems of double baseline stereo photogrammetric mode with combination of linear and area array sensor is proposed, which aims at solving the problems of barriers, distortions and radiation differences in complex ground object mapping for the existing space stereo mapping technology. Based on collinearity equation, the double baseline stereo photogrammetric method and the model of combined adjustment are presented, systematic error compensation for this model is analyzed, and position precision of double baseline stereo photogrammetry based on simulated image is studied. The results show that the mode of combination of one linear array sensor and one plane array sensor has higher positioning precision. The new system of 1︰5 000 scale very high accuracy space stereo mapping can provide new technologies and strategies for achieving very high accuracy space stereo mapping.