现代防御技术2011，Vol.39Issue(3)：63-66,147,5.DOI:10.3969/j.issn.1009-086x.2011.03.013
GPS动态定位中整周模糊度的快速解算
Rapid Resolution of GPS Integer Ambiguity in Dynamic Positioning
摘要
Abstract
The fast and precise GPS positioning in navigation needs solving the integer ambiguity from different observations. Currently, the epoch message will be lost in the integer ambiguity solving method. Moreover, the process of eliminating relation has to contain the covariance positive matrix, which is hard and low efficient to decompose and even results to improper decomposition, causing the failure of de-correlation. A rapid solution of GPS integer ambiguity is put forward. Firstly, the floating - point in integer ambiguity is calculated with Kalman filter method. Then, the search space is confirmed and covariance matrix is analyzed with Cholesky in order to weaken the correlation. Finally, the integer ambiguity is solved with and verified by ratio. The theoretical arithmetic and analysis based on the data in real condition indicate that the precision of floating point result with kalman is effectively improved. The problem that covariance matrix must be positive in process of eliminating relation is resolved , the improp er decomposition is avoided and the search space is ameliorated. Therefore, the method is useful in prac tice.关键词
载波相位/整周模糊度/卡尔曼滤波/对称三角分解Key words
carrier phase/ integer ambiguity/ Kalman filter/ Cholesky decompositioncarrier phase/ integer ambiguity/ Kalman filter/ Cholesky decomposition分类
天文与地球科学引用本文复制引用
刘少鹏,卢艳娥,周亚飞..GPS动态定位中整周模糊度的快速解算[J].现代防御技术,2011,39(3):63-66,147,5.基金项目
陕西省自然科学基金资助项目(No.SJ08F11) （No.SJ08F11）
