基于历元星间双差模型的GNSS测速方法  

GNSS speed measurement method based on double difference model between epochs and satellites

作　　者：靳少飞 杨震 顾和和[1,2] 徐永明 JIN Shaofei;YANG Zhen;GU Hehe;XU Yongming(School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;National Administration of Surveying Mapping and Geo-information Key Laboratory of Land Environment and Disaster Monitoring,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]中国矿业大学国土环境与灾害监测国家测绘地理信息局重点实验室,江苏徐州221116

出　　处：《河南理工大学学报（自然科学版）》2020年第1期53-59,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41674008)

摘　　要：速度信息是描述物体运动状态的重要参数之一,利用GNSS技术可以迅速可靠地进行速度测量。本文利用GNSS载波相位观测值,提出历元星间双差的测速方法。该方法仅需利用单个GNSS接收机的载波相位观测值先后在历元和星间求差,以双差值为观测值,先求解载体在历元间移动的距离,根据历元间的时间间隔求解其速度。试验结果表明:该方法在静态并且观测环境较好的条件下,E,N,U方向上的测速精度优于RTK位置差分和多普勒测速方法;在动态且观测环境较差的条件下,E,N,U方向上的测速精度优于RTK位置差分测速方法,但较多普勒测速方法差。Speed information is one of the important parameters to describe the motion state of an object.With GNSS technology,speed measurement can be performed quickly and reliably.In this paper,the carrier phase observation value was used to propose a method of measuring the speed by double difference between epochs and satellites.The method only needed to use the carrier phase observation value of a GNSS receiver to successively calculate the difference between the epoch and the satellite,and took the double difference as the observation value,first solved the distance that the carrier moved between the epochs,and then solved the velocity according to the time interval between the epochs.Through experiments,the accuracy of the speed measurement in the E,N,and U directions under static and observing conditions were better than that of RTK position difference and Doppler speed measurement method.The accuracy of the speed measurement in the E,N,and U directions under dynamic and observing conditions were better than the RTK position difference method,but were worse than the Doppler method.

关 键 词：GNSS测速 历元星间双差 位置差分测速 多普勒测速 

分 类 号：P228[天文地球—大地测量学与测量工程]