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- 2018
利用L1范数和中位数选取拟准观测值
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Abstract:
粗差探测拟准检定法的核心是拟准观测的选取。提出了L1范数和中位数相结合的方法选取拟准观测值，并设计了相应的准则。首先利用L1范数方法得到稳健的残差，将其中残差接近于零时对应的观测值直接确定为拟准观测值，然后将余下残差形成新的残差向量，并计算其绝对值的中位数，拟准观测值即为那些余下残差绝对值小于中位数所对应的观测值。GPS网平差和GPS单点定位计算结果表明本文提出的选取拟准观测值的方法有效可行
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