全球定位系统
全毬定位繫統
전구정위계통
GPS WORLD OF CHINA
2011年
5期
1-5
,共5页
王振杰%王心众%范士杰%赵健
王振傑%王心衆%範士傑%趙健
왕진걸%왕심음%범사걸%조건
GPS%变形监测%单频单历元算法%随机模型精化
GPS%變形鑑測%單頻單歷元算法%隨機模型精化
GPS%변형감측%단빈단역원산법%수궤모형정화
GPS%deformation monitoring%single epoch algorithm using single frequency GPS receivers%a refined stochastic model
研究了一种适合变形监测的考虑随机模型精化的单频单历元算法。分析了单频单历元相位双差观测方程法矩阵的特性;基于吉洪诺夫正则化方法,将秩亏的法方程由秩亏变为满秩,得到模糊度的浮动解及其相应的均方误差矩阵,结合LAMBDA方法可准确地固定模糊度,得到基线向量的单历元解;给出了实时权的计算公式,用实时权代替固定权,提高了解算模糊度的成功率。通过一个3km长的基线算例说明算法的效果。
研究瞭一種適閤變形鑑測的攷慮隨機模型精化的單頻單歷元算法。分析瞭單頻單歷元相位雙差觀測方程法矩陣的特性;基于吉洪諾伕正則化方法,將秩虧的法方程由秩虧變為滿秩,得到模糊度的浮動解及其相應的均方誤差矩陣,結閤LAMBDA方法可準確地固定模糊度,得到基線嚮量的單歷元解;給齣瞭實時權的計算公式,用實時權代替固定權,提高瞭解算模糊度的成功率。通過一箇3km長的基線算例說明算法的效果。
연구료일충괄합변형감측적고필수궤모형정화적단빈단역원산법。분석료단빈단역원상위쌍차관측방정법구진적특성;기우길홍낙부정칙화방법,장질우적법방정유질우변위만질,득도모호도적부동해급기상응적균방오차구진,결합LAMBDA방법가준학지고정모호도,득도기선향량적단역원해;급출료실시권적계산공식,용실시권대체고정권,제고료해산모호도적성공솔。통과일개3km장적기선산례설명산법적효과。
A new single epoch algorithm for deformation monitoring with a refined stochastic model using single frequency GPS receivers is proposed in this paper.At first,the characteristic of the normal matrix for carrier phase measurements is analyzed.Then,based on Tikhonov regularization,a regularizer is chosen to transform the normal matrix from the rank-deficient to the full rank.The float ambiguity solutions and their Mean Squared Error Matrix（MSEM） are obtained.MSEM can be used to determine the search space for the integer ambiguities,combined with LAMBDA.The computation formula of real-time weight are deprived instead of the fixed one to improve the success of resolving the integer ambiguities.At last,the proposed single epoch algorithm is tested using carrier phase measurements of two single frequency GPS receivers with a baseline over 3 km.
