【摘要】 本文介绍了中国科学院上海天文台、北京无线电计量测试研究所和中国计量科学研究院利用4套不同类型的C/A码GPS接收机所进行的GPS共视时间比对实验以及搬运GPS接收机的校准测量。结果表明,不同GPS接收机系统的时延偏差可达近200ns,对于GPS时间传递来说这是一个必须予以改正的系统量。实验还给出了太阳活动高峰期GP5共视时间比对可能的精度:在持续一个月的比对中,对于上海本地基线,夜晚约为7ns,白天约为18ns;对于上海至北京大约1000km的基线,夜晚约为16ns,白天约为22ns。通过对实验数据的分析,本文提出了改善GPS共视时间比对精度的措施。更多还原

【Abstract】 -Using four types of differently designed C/A code Global Positioning System (GPS) receivers, the GPS common view time comparison experiment and portable GPS receiver calibration have been performed among SO. BIRM and NIM. The results show that the time delay offset between different receiver systems could be near 200 ns, and it must be corrected for GPS time transfer. The possible precision of GPS common view during the period of large solar activity has been obtained in this experiment. During time comparison of about one month, it is about 7 ns during night and 18 ns during daytime for Shanghai local baseline; about 16 ns during night and 22 ns during daytime for Shanghai-Beijing baseline of about 1000 km, respectively. Based on the analysis for the experimental data, some procedures concerning have been proposed in this paper to improve the time comparison precision of GPS common view.更多还原