Abstract:
In order to meet the demand of GPS real/near real time (RT/NRT) application, it is proposed that a clock estimation algorithm with high reliability and adequate accuracy,...Show MoreMetadata
Abstract:
In order to meet the demand of GPS real/near real time (RT/NRT) application, it is proposed that a clock estimation algorithm with high reliability and adequate accuracy, which is based on arc-wise observation data gained by merging hourly files or 15-min files offered by IGS. It is analyzed emphatically that the critical influence factors of the algorithm, and account the efficacy of the algorithm. Test indicates that lengths of the observation arc, precision of the obit, ERP and station number are all the important influence factors of the novel algorithm. When the observation arc is set as 24h, 12h, 6h, 3h, 1h, 0.5h and the station number is 120, STD of the clock offset is 0.05ns, 0.11ns, 0.19ns, 0.22ns, 0.27ns, 0.29ns, while the STD of the clock offset decreases by 100%, 73%, 47%, 48%, 52%, 58% when the station number is reduced by half, what's more the STD of the clocks decreases by 120%, 27%, 5%, 4%, 4%, 7% as the precision of orbit decreases.
Published in: 2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)
Date of Conference: 09-13 July 2017
Date Added to IEEE Xplore: 30 October 2017
ISBN Information:
Electronic ISSN: 2327-1949