基于载噪比加权的GPS单频单历元定姿算法

doi:10.13485/j.cnki.11-2089.2014.0159

测绘学报 ›› 2014, Vol. 43 ›› Issue (10): 1032-1038.doi: 10.13485/j.cnki.11-2089.2014.0159

基于载噪比加权的GPS单频单历元定姿算法

金天¹,原青¹,郑光辉²,张立杨¹

1. 北京航空航天大学电子信息工程学院
2. 中央党校　数字图书馆

收稿日期:2013-12-23 修回日期:2014-07-22 出版日期:2014-10-20 发布日期:2014-10-24
通讯作者: 原青 E-mail:yqyammy0515@163.com

Carrier to Noise Ratio Weighted Algorithm in GPS Single Epoch Single Frequency Attitude Determination

JIN Tian¹,YUAN Qing¹,ZHENG Guanghui²,ZHANG Liyang¹

1. Electronic and Information Engineering , Beihang University
2. Digital Library of Party School of the Central Committee of C.P.C.

Received:2013-12-23 Revised:2014-07-22 Online:2014-10-20 Published:2014-10-24
Contact: YUAN Qing E-mail:yqyammy0515@163.com

摘要/Abstract

摘要：

针对GPS定姿系统中，传统的利用高度角的加权不能有效反映遮挡情况的问题，从接收机的卫星载噪比出发，对载波相位精度进行分析，提出新的权重矩阵?，对观测模型进行加权。

加权后模型根据最小二乘得到整周模糊度和基线矢量的浮点解。加权方法能够降低弱信号卫星的载波相位观测值对姿态测量成功率的影响。通过对比实验验证了加权算法的合理性和有效

性。部分试验结果表明，相比于未加权算法，载噪比加权算法可以使单历元定姿成功率提高5个百分点；相比于高度角加权算法，载噪比加权可以使成功率提高1~2个百分点。

关键词: 全球定位系统, 姿态测量, 单历元, 载噪比

Abstract:

In?GPS?attitude?determination?system,?carrier?phase?and?code?measurements?from?two?antennas?are?used?to?get?precise?attitudes?such?as?pitch?and?yaw.?In?single?epoch?single?frequency?

attitude?determination?algorithm,?because?of?the?coarse?precision?of?carrier?phase,?the?observables?have?lower?accuracy?so?that?the?success?rate?of?single?epoch?attitude?determination?algorithm?

is?always?low.?In?order?to?improve?the?success?rate,?the?weighted?values?can?be?proposed.?The?traditional?elevation?weighted?algorithm?can’t?reflect?the?situation?of?occlusion?effectively.?To?

deal?with?this?problem,?this?paper?analyzes?the?accuracy?of?carrier?phase?by?the?carrier?to?noise?ratio?received?from?dual?antenna?receiver,?and?proposes?a?new?algorithm?based?on?weighted

?matrix?W.?In?the?new?algorithm,?the?leastsquares?(ILS)?are?used?to?estimate?ambiguity?and?baseline?vector.?The?proposed?algorithm?can?improve?the?success?rate?under?situation?when

?satellite?signal?is?weak?and?precision?of?carrier?phase?is?low.?By?Comparative?experiments,?it?is?verified?the?rationality?and?effectiveness?of?the?proposed?algorithm.?Simulation?results?

show?that?the?proposed?CN0?weighted?algorithm?can?increase?the?success?rate?of?single?epoch?attitude?determination?by?5?percent?compared?to?the?traditional?algorithm,?

1-2?percent?compared?to?the?elevation?weighted?algorithm.

Key words: GPS, attitude determination, single epoch, carrier to noise ratio

金天原青郑光辉张立杨. 基于载噪比加权的GPS单频单历元定姿算法[J]. 测绘学报, 2014, 43(10): 1032-1038.

JIN Tian YUAN Qing ZHENG Guanghui ZHANG Liyang. Carrier to Noise Ratio Weighted Algorithm in GPS Single Epoch Single Frequency Attitude Determination[J]. Acta Geodaetica et Cartographica Sinica, 2014, 43(10): 1032-1038.

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基于载噪比加权的GPS单频单历元定姿算法

Carrier to Noise Ratio Weighted Algorithm in GPS Single Epoch Single Frequency Attitude Determination

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