| 短基线约束条件下的整周模糊度二维搜索算法 |
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| 引用本文： | 庞春雷,赵修斌,卢艳娥,严玉国,余永林.短基线约束条件下的整周模糊度二维搜索算法[J].中国空间科学技术,2012,32(3):43-48,56. |
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| 作者姓名： | 庞春雷 赵修斌 卢艳娥 严玉国 余永林 |
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| 作者单位： | 空军工程大学电讯工程学院,西安,710077 |
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| 基金项目： | 国家自然科学基金，学院科学创新基金 |
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| 摘 要： | 通过对基线仰角和方位角的搜索,在二次残差最小的条件下确定整周模糊度。建立了搜索模型,论述了搜索原理及其应用的具体过程,推导了粗搜索和精搜索的步长。通过试验与最小二乘降相关平差(Least-squares Ambiguity Decorrelation Adjustment,LAMBDA)算法进行分析比较,验证了新方法的正确性及可靠性,得到了1cm的基线精度,0.6°的仰角和0.4°的方位角精度,且算法简单,搜索效率高,适用于载体的姿态测量。
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| 关 键 词： | 短基线约束 二维搜索 整周模糊度 姿态测量 航天器 |
Planar Search Algorithm for GPS Ambiguity Resolution with Short Baseline Length Constraint |
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| Pang Chunlei
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Zhao Xiubin
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Lu Yan'e
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Yan Yuguo
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Yu Yonglin.Planar Search Algorithm for GPS Ambiguity Resolution with Short Baseline Length Constraint[J].Chinese Space Science and Technology,2012,32(3):43-48,56. |
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| Authors: | Pang Chunlei Zhao Xiubin Lu Yan'e Yan Yuguo Yu Yonglin |
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| Institution: | Pang Chunlei Zhao Xiubin Lu Yan′e Yan Yuguo Yu Yonglin(College of Telecommunication Engineering,Air Force Engineering University,Xi′an 710077) |
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| Abstract: | A new planar search method for GPS ambiguity resolution with short baseline length constraints was proposed.The integer ambiguity was fixed in the condition of least square error by searching the baseline elevation and azimuth angle.The model was established,the search principle and application process of the new algorithm were discussed,and the step of extensive search and intensive search was induced.Through the experiments and comparing with LAMBDA algorithm,the new method with simple algorithm and high efficiency was proved.The error is no more than 1cm in baseline precision,no more than 0.6° in elevation precision and no more than 0.4° in azimuth precision.This method is also adaptive to attitude measurement. |
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| Keywords: | Short baseline confinement Two dimensional searching Integer ambiguity Attitude measurement Spacecraft |
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