| 引用本文: | 秦红磊,陈万通,金天,丛丽.一种基于GPS单差模型的姿态解算算法[J].哈尔滨工业大学学报,2011,43(9):105.DOI:10.11918/j.issn.0367-6234.2011.09.021 |
| QIN Hong-lei,CHEN Wan-tong,JIN Tian,CONG Li.An attitude determination algorithm based on GPS single-differenced mode[J].Journal of Harbin Institute of Technology,2011,43(9):105.DOI:10.11918/j.issn.0367-6234.2011.09.021 |
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| 摘要: |
| 针对采用双差模型无法克服双差观测量的强相关性这一问题,以观测量不相关的单差模型为基础,提出一种可递归处理的定姿算法.该方法用码观测量辅助载波相位观测值,增加了信息量,通过递归估计模糊度浮点解及其方差协方差矩阵,从而可以利用LAMBDA算法估计整周模糊度.该算法计算量较小,且具有数值稳定性.实验结果表明,该算法的初始化时间仅占双差模型所用时间的1/50左右.该算法可以有效缩短初始化阶段,能够高效地用于动态姿态解算. |
| 关键词: 全球定位系统 姿态解算 整周模糊度 短基线 |
| DOI：10.11918/j.issn.0367-6234.2011.09.021 |
| 分类号:P228.4 |
| 基金项目:国家高技术研究发展计划资助项目(2009AA12Z313) |
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| An attitude determination algorithm based on GPS single-differenced mode |
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QIN Hong-lei, CHEN Wan-tong, JIN Tian, CONG Li
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School of Electronic and Information Engineering,Beihang University,100191 Beijing,China
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| Abstract: |
| It is difficult to overcome the high correlation of double differential observation using double-differenced model and the initialization procedure costs a long time with makes it difficult to apply in practice.To deal this problem,a recursive algorithm based on the single-differenced model is presented in which the observations are not correlated.The new method increases observation information with the aid of code for original carrier phase observation.At the same time the float ambiguity solutions and its variance-covariance matrix can be obtained recursively and it makes the LAMBDA method be used to estimate the integer ambiguities.The method is also less computation with numerical stability.The experiment results show that the time of initialization is reduced to about 1/50 of that using the double-differenced method,so this method can be effectively applied in practical attitude determination for shortening initialization procedure. |
| Key words: GPS attitude determination integer ambiguity short baseline |
