本文推导了星载测定外方位元素参与下，无地面控制点卫星摄影测量高程误差估算公式。
This paper deduces elevation error estimating formulae of the satellite photogrammetry, which is concerned with elements of exterior orientation that measured by spaceborne sensors.
由此总结出在云南高原地区进行红外仪三角高程代替三、四水准，所产生误差的规律性，并制定一套较实用的操作规程。
The regularity of error and practical instructions are summarized for using infrared range-measurement system instead of the third of fourth grade levelling on Yunnan Plateau.
在数字高程模型(DEM)允许误差的条件下，一定存在最优基线使得DEM精度最佳。
In the condition of acceptable Digital Elevation Model (DEM) error, there must be an optimal baseline which makes DEM precision highest.
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