摘要
提出一种基于重复计算可靠性矩阵ＱＶＶＰ的逐次递归快速算法的观测值自动定权方法。试验证明，在ＧＰＳ辅助光束法区域网平差中，只要在迭代过程中逐次对各类观测值进行验后权估计和修正，迭代收敛时，虚拟的自检校观测值和漂移误差改正参数的权可被惟一确定，而真实观测值如地面控制点坐标、ＧＰＳ摄站坐标和ＧＰＳ天线偏心分量的权却随先验权的不同而略有变化。尽管如此，区域网平差仍能得到一致收敛的解。
In this paper, the author raise a methodology determining automatically the observation weights in GPS supported bundle block adjustment. During iterative computation, the observation weights can be corrected automatically by using the posterior variance estimation based on a fast recursive algorithm for repeated computation of the reliability matrix Q VV P. In any case, the estimator of weights of additional parameters observations and drift error parameters observations are comparatively exact. However, the weights of ground control point observations, GPS camera positions observations and GPS offset observations can not be estimated exactly. The experiment has shown that a stable and reliable adjustment results are ensured even if the author selected wholly different initial weights of the observations, and the additional computation amount is acceptable.
出处
《武汉测绘科技大学学报》
CSCD
1999年第2期115-118,共4页
Geomatics and Information Science of Wuhan University
基金
国家测绘局跨世纪人才基金
国家"863计划"
关键词
GPS
辅助光束法
平差
观测值
自动定权
GPS supported bundle block adjustment
redundancy
weight
accuracy
