本文利用武汉测绘科技大学自行研制的摄影测量与非摄影测量观测值联合平差程序WuCAPS系统对天津蓟县某测区一组实际GPS 控制飞行的航摄像片进行了处理。针对GPS辅助空中三角测量中的若干问题，如构架航线的敷设、地面控制点的布设、无地面控制空中三角测量的精度等，进行了研究。通过对测区进行GPS辅助光束法区域网平差计算得到了与国外相同的研究结果。此外，文中还对如何实施GPS辅助空中三角测量提出了实用建议。

In conventional aerial photogrammetry, high precision photogrammetric point determination is always carried out by aerotriangulation using a great deal of ground control points around the perimeter and in the center of a block area because the exterior orientation parameters of aerial photographs are unknown. A technological revolution in photogrammetry has taken place since Navstar Global Positioning System (GPS) was applied to determine the 3D coordinates of exposure station positions during the photo flight missions. GPS-supported aerotriangulation is conducted by a combined bundle adjustment wth GPS navigation data, which replaces the essential ground control points with GPS-determined camera positions. The simulation experiments of GPS-supported aerotriangulation can date back at least to 1986. Recent investigations show this method is now practical. We have been engaged in theoretical studies, software development, and related to experiments and production on the field since 1990. So far, most-abundant research achievements are obtained in terms of the theory and application. In this paper, we first derive the mathematical model of combined bundle adjustment with GPS navigation data from the geometry between camera and airbrone GPS antenna, and then describes briefly a software package WuCAPS (Wuhan Combined Adjustment Program System) developed by the author, which serves the purpose of combined bundle adjustment for photogrammetric and non-photogrammetric observations. At the end of the present work,a set of actual aerial photographs, at an image scale of 1:34,000, with airborne GPS data taken fromTianjing site in China were processed by our WuCAPS. The empirical results have verified that theaccuracy of the combined bundle adjustment with 4 XYZ ground control points around the corners of block area is very closed to that of the conventional bundle adjustment with 3 additional parameters, which leads to an 88% reduction in field survey and 75% saving in production cost, and can meet the specification of topographic mapping at small or medium scale by GPS-supported aerotriangulation without ground control. This shows the ample applicability and the economic benefit of kinematic GPS relative positioning in high accurate photogrammetric point determination.