摘要
为了消除多代卫星测高数据之间的不协调性,利用两步处理法对Geosat/GM正常点海面高数据进行自交叉点平差及与T/P卫星测高数据联合平差,发现误差模型的系数计算出现异常,通过分析误差模型及正常点海面高数据的分布特征,找出了出现异常的原因,对计算方法进行改进后,大大提高了计算结果的稳定性和可靠性。
In order to eliminate the inconsistency of the existing data from multi-satellite missions, we use a new method for the crossover adjustment which is modified to a two steps processing based on the a posteriori compensation theory of error. The theory of two steps processing used in Geosat/GM crossover point adjustment. Statistics of crossover point SSH differences before and after crossover adjustment is anomaly, Based on an analysis of the orbit theory of Geosat/Gm altimeter satellite, the result show this is Rungel phenomenon. A modified compute model for crossover adjustment from altimeter data is proposed. The new solution procedure is used to both local and global crossover adjustment problem. The computation results are used to prove the efficiency and reliability of the modified method .
出处
《海洋测绘》
2008年第1期5-8,共4页
Hydrographic Surveying and Charting
基金
国家海洋专项资助项目
关键词
卫星测高
交叉点平差
龙格现象
satellite altimetry
crossover adjustment
Rungel phenomenon
