全球定位系统2024，Vol.49Issue(6)：47-54,8.DOI:10.12265/j.gnss.2024108
基于RINEX4.0广播ERP参数的BDS星历误差实时补偿方法
Real-time compensation method for BDS ephemeris errors based on RINEX 4.0 broadcast earth rotation parameters
摘要
Abstract
Earth rotation parameters(ERP)are crucial for maintaining the Earth reference frame and have significant importance for precise satellite orbit determination.In December 2021,the International GNSS Service(IGS)released the Receiver Independent Exchange(RINEX)version 4.00 protocol,which for the first time included ERP in the broadcast ephemeris.This study utilizes the broadcast ERP from the RINEX4.00 format to compensate for ephemeris errors.We extract ERP data records from broadcast ephemeris files from 2022 to 2023 to assess the accuracy of GPS and BDS-3 broadcast ERP.An effective data editing method is proposed to address duplicate and anomalous ERP,and the accuracy of GPS and BDS-3 broadcast ERP is evaluated using the IERS C04 product as a reference.The root mean square(RMS)of differences between the GPS broadcast ERP parameters and the C04 product were 2.309 mAs for the polar motion parameters and 1.433 mAs～0.303 ms for the length of day parameter,while the RMS of differences for the BDS-3 broadcast ERP are 2.769 mAs,1.748 mAs,and 0.372 ms,respectively.Compared to GPS,the RMS differences for the three BDS-3 parameters increase by 19.9%,22.0%,and 22.8%,indicating lower accuracy.Based on this,the correlation between broadcast ERP errors and orbital rotation parameters is studied,and a real-time compensation scheme for BDS-3 ephemeris errors using GPS broadcast ERP is designed.Experiments show that this scheme can achieve 40%～60%of the compensation effect of the final IERS C04 product.关键词
地球自转参数(ERP)/广播星历/精密星历/星历误差/精密定轨Key words
earth rotation parameters(ERP)/broadcast ephemeris/precise ephemeris/ephemeris errors/precise orbit determination分类
天文与地球科学引用本文复制引用
张岩,周康,袁勇强..基于RINEX4.0广播ERP参数的BDS星历误差实时补偿方法[J].全球定位系统,2024,49(6):47-54,8.基金项目
国家重点研发计划(2021YFC3000504) （2021YFC3000504）
