摘要
海洋测量中的交叉点误差反应了测量的误差信息,交叉点误差分析是海洋测量数据处理的重要环节。首先对可能引起交叉点误差的误差源进行了分析,然后讨论了从交叉点误差分析中可能提取的信息,最后对数据连续化过程中交叉点的定位与交叉点误差的确定进行详细分析。研究发现在进行数据连续化以定位交叉点的过程中,交叉点处测量值的误差特性将不同于原始测量值的误差特性,而且不同交叉点误差之间可能存在相关性。导出了交叉点误差方差以及不同交叉点误差间协方差的公式,从而能够求得交叉点误差向量的方差协方差矩阵,该矩阵在后续的平差处理中具有重要作用。
The measurement error information in marine surveys is embeded in the crossover errors.Crossover error analysis is an important part of the processing of survey data.First, the sources causing the crossover error are analyzed.Second, information which can be potentially extracted from the crossover error is discussed.Third, locating the crossover and determining the crossover error are studied in detail. It is revealed that the error character of the determined measurement at the crossover is different from that of the original one, furthermore, correlations between some crossover errors may arise.The variances of the crossover errors and the covariances between them, if not null, are theoretically calculated. The resulted variance-covariance matrix will play a significant role in the subsequent adjustment processing.
出处
《海洋测绘》
CSCD
2015年第4期1-6,共6页
Hydrographic Surveying and Charting
基金
国家自然科学基金(41404001
41374018)
关键词
海洋测量
交叉点误差
误差源
信息提取
相关性
marine survey
crossover error
error source
information extraction
correlation
