doi:10.16186/j.cnki.1673-9787.2020.1.7

Received:2019-05-12 00:00:00

Revised:2019-07-03 00:00:00

Published:2020/01/15

GNSS speed measurement method based on double difference modelbetween epochs and satellites

JIN Shaofei1,2, YANG Zhen1,2, GU Hehe1,2, XU Yongming1,2

1.School of Environment Science and Spatial Informatics， China University of Mining and Technology ，Xuzhou  221116 ， Jiangsu， China;2.National Administration of Surveying Mapping and Geo-information Key Laboratory ofLand Environment and Disaster Monitoring， China University of Mining and Technology ，Xuzhou  221116 ， Jiangsu， China

Abstract: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.

Key words:GNSS speed measurement;double difference between epochs and satellites;position difference speed

 基于历元星间双差模型的GNSS测速方法_靳少飞.pdf