Ionospheric corrections for GPS time transfer
Ionospheric corrections for GPS time transfer
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DOI：
10.1002/2013rs005212
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发表时间：
2014-03
期刊：
影响因子：
1.6
通讯作者：
J. Rose;R. Watson;Damien J. Allain;C. Mitchell
中科院分区：
文献类型：
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作者：
J. Rose;R. Watson;Damien J. Allain;C. Mitchell
测试了一个真实的时间电离层测绘系统，以研究其在欧洲单频全球定位系统（GPS）时间传递中补偿电离层延迟的能力。该技术与其他两种单频系统进行了比较：一种不包含任何电离层校正，另一种使用广播Klobuchar模型。双频技术也被显示为基准。在2003年3月的一个时期，在太阳活动最大期间，已被用来显示结果时，电离层延迟是大的和可变的。来自两个欧洲GPS监测中心的数据被用来测试时间传递方法。对于几分钟到几小时之间的平均时间，时间转移的不稳定性主要是电离层效应。在较长的平均时间的不稳定性被认为是由于时钟噪声和硬件的不稳定性。通过使用电离层层析成像系统，时间传递不稳定性得到了改善。
A real‐time ionospheric mapping system is tested to investigate its ability to compensate for the ionospheric delay in single‐frequency Global Positioning System (GPS) time transfer over Europe. This technique is compared with two other single‐frequency systems: one that does not incorporate any ionospheric correction and one that uses the broadcast Klobuchar model. A dual‐frequency technique is also shown as a benchmark. A period in March 2003, during a solar maximum, has been used to display results when the ionospheric delays are large and variable. Data from two European GPS monitoring centers were used to test the time‐transfer methods. For averaging times between several minutes and a few hours, the instabilities in the time transfers were dominated by ionospheric effects. The instabilities at longer averaging times were found to be due to clock noise and hardware instabilities. Improvements in time‐transfer instabilities are shown by using the ionospheric tomography system.