摘要
随着卫星数量和地面监测站数量的不断增多,每天将会产生大量的GNSS观测数据,若利用所有观测数据确定精密钟差,必定会影响其解算效率。为分析利用不同的测站数量确定精密钟差和利用GNSS多系统联合确定精密钟差对钟差解算的精度和解算速度的影响,本研究将采用具有4系统接收能力的MGEX测站和i GMAS测站的观测数据解算卫星钟差,根据解算结果分析测站数目与解算效率的关系以及不同解算策略与解算效率的关系。结果表明当测站数目增加到50个时,耗时最高增加39%,而相应钟差精度最高仅提升了10.5%,两步法解算策略较一步法解算策略,精度最高提高了48.02%,而耗时则减少了41.82%。
With the number of satellites and ground monitoring stations increasing, a lot of GNSS observation data will be produced every day. Making the use of all data to determine the precision clock error will certainly affect the efficiency of its solution. In order to determine the precision clock error by the use of different stations, and clarify the effect of the precision clock error on the calculation accuracy and computation speed jointly by GNSS multi system,the observation data from MGEX station and iGMAS station with receiving ability of four systems are adopted to calculate the satellite clock error. According to the calculation results ,the relationship between the number of stations and the solution efficiency and the relationship between different solution strategy and the solution efficiency are analyzed. The results show that when the number of stations increases to 50, the time-consuming is maximumly increased by 39%, and the precision of corresponding clock error is only improved by 10.5%. The two-step solution strategy is improved by 48.02% compared with one-step method, while the time-consuming is reduced by 41.82%.
出处
《金属矿山》
CAS
北大核心
2017年第10期59-62,共4页
Metal Mine
关键词
卫星钟差
北斗三号试验卫星
测站数目
Satellite clock error,No. 3 Beidou satellites,Number of stations
