SPOT像片外方位元素之间的相关性及克服方法的研讨

本文从数学公式出发分析了SPOT像片外方位元素之间强相关的性质;讨论了在解求外方位元素时为克服强相关的影响而采用的两种方法,即线元素与角元素迭代求解法和定向未知数引入“伪观测值”法;并根据相关分析提出了一种新的方法——合并相关项求解法。试验结果表明:这一方法不仅具有计算收敛快、法方程答解稳定等特点,而且具有较高的解算精度。

Study of the correlation characteristics of SPOT image exterior elements and overcoming solutions

This paper analyses the strong correlation oharacteristics of SPOT image exterior elements basing on mathematical formula, discusses two solutions for overcoming the affection of strong correlation, i. e. Linear and angular elements iteratire solving method and Adding quasi observable method, proposes a new method-Merging correlative item method, and yet presents the test result. The result demonstrates that the new method not only has characteristics of computation converging fast and the normal equation solving stably, but also has high precision.