赤道异常区GPS-TEC与系统硬件偏差的反演
doi: 10.11728/cjss2008.06.541
Derivation of GPS-TEC and Instrumental Biases in the Equatorial Anomaly Region
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摘要: 提出了一种基于最小二乘的赤道异常区GPS-TEC与系统硬件偏差的反演方法.利用设置在福州、厦门、广州和南宁4个台站的观测数据,可以得到GPS卫星和接收机的硬件偏差以及(20°~28°N,105°~123°E)区域中48个3°×1°网格的TEC(时间分辨率为15 min).应用于2006年观测数据,得到了较稳定的系统硬件偏差,其中卫星硬件偏差值与欧洲定轨中心公布的结果接近,得到的TEC具有合理的日变化和季节变化特征.该反演方法可以应用于赤道异常区电离层的研究.Abstract: Based on least-square technique, this paper presents a method to derive GPS-TEC and instrumental biases of GPS observation in equatorial anomaly region. Applying the method to the data from 4 GPS receivers located at Fuzhou, Xiamen, Guangzhou and Nanning in 2006, the TEC is obtained for 48 meshes with size of 3°× 1° in longitude and latitude covering an area of 20~28°N, 105°~123 °E. The instrumental biases are stable in the whole year. The satellite biases are close to those published by Center for Orbit Determination in Europe. This method can be used to study the ionosphere in equatorial anomaly region.
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Key words:
- GPS /
- Ionosphere /
- TEC /
- Instrumental biases
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