附有约束的BDS单频单历元改进型Par Lambda算法

发布时间：2018-01-11 06:02

  本文关键词：附有约束的BDS单频单历元改进型Par Lambda算法　出处：《中国矿业大学学报》2017年01期 　论文类型：期刊论文

  更多相关文章： 变形监测 BDS 基线约束 单频单历元 改进型Par Lambda

【摘要】：根据建筑物变形监测的特点,在部分模糊度解算(Par Lambda)算法基础上提出了一种基于北斗卫星导航系统(BDS)的单频单历元附有基线约束的改进型Par Lambda算法,该方法采用BDS单历元测码伪距和单频载波相位观测值组成的双差观测方程与基线长度约束方程进行最小二乘解算,获得模糊度浮点解方差-协方差阵,根据模糊度浮点解精度对双差模糊度进行(2,1,1,…,1)分级处理,基于Lambda算法分批次固定双差模糊度.采用该方法对BDS系统的B1和B2频段的1,5和10s短基线数据进行单频单历元解算.结果表明:采用BDS单频单历元模糊度解算时采用该方法的成功率较传统方法高,其成功率达到98%以上.
[Abstract]:According to the characteristics of building deformation monitoring. Based on the partial ambiguity resolution (par Lambda) algorithm, a new algorithm based on Beidou Satellite Navigation system (BDS) is proposed. An improved Par Lambda algorithm with baseline constraints for single-frequency single epoch. In this method, the two-difference observation equation composed of the pseudo-range of BDS single epoch code and the observation value of single-frequency carrier phase and the baseline length constraint equation are used to solve the least square solution, and the variance-covariance matrix of ambiguity floating point solution is obtained. According to the precision of floating-point solution of ambiguity, the double difference ambiguity is classified into two grades. Based on the Lambda algorithm, the double difference ambiguity is fixed in batches. The method is applied to the B1 and B2 bands of BDS system. The short baseline data of 5 s and 10 s are used to calculate single frequency single epoch. The results show that the success rate of using BDS single frequency single epoch ambiguity resolution method is higher than that of the traditional method, and the success rate is more than 98%.
【作者单位】： 中国矿业大学环境与测绘学院;
【基金】：国家自然科学基金项目(41504032,41371423) 江苏省自然科学基金项目(BK20150175)
【分类号】：TU196.1;P228.4
【正文快照】： 由于全球卫星导航系统(GNSS)具有快速、全天候、全自动等优点,已广泛应用于各类构建筑物的实时动态监测.2012年12月27日北斗区域卫星导航系统正式开始运行,北斗载波相位差分定位精度达到或优于厘米级[1],可以应用于各种构建筑物的实时动态监测.在采用北斗卫星导航系统(BDS)进，

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