Improved ionospheric model algorithm for LEO satellite single-frequency precise orbit determination

被引：0
|
作者：
Tian Y. [1 ,2 ]
Hao J. [1 ,2 ]
Yu H. [1 ,2 ]
Liu W. [1 ,2 ]
Xie J. [1 ,2 ]
Zhang K. [1 ,2 ]
机构：
[1] Institute of Navigation and Aerospace Engineering, Information Engineering University, Zhengzhou
[2] Beidou Navigation Technology Collaborative Innovation Center of Henan, Zhengzhou
来源：
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | 2016年 / 45卷 / 07期
关键词：
International reference ionosphere 2012; Single-frequency precise orbit determination; Swarm satellite; The height of electron density peak; The method of ionospheric scale factor;
D O I：
10.11947/j.AGCS.2016.20150628
中图分类号：
学科分类号：
摘要：
Ionospheric delay correction is the core issue of LEO satellite single-frequency precise orbit determination. At present, “the method of ionosphere scale factor” is mainly adopted in the LEO satellite ionospheric delay correction, but the method doesn't consider the electron density peak height along with the variation of factors, such as latitude and longitude, day and night, seasons, solar activity, etc. IRI2012 model while considering the influence of the above factors on the electron density peak height, but because of the height criteria inconsistent with ionosphere single layer model, there is usually a systematic deviation and can't be used directly. Therefore, this paper puts forward to an improved ionospheric delay correction method, the ionosphere thin layer height as the constraint condition of IRI2012 model of electron density peak height of the mean parameter estimation. Based on Swarm satellite single-frequency observation data, the effectiveness of the method was verified. The results showed that: with the improved model of the ionosphere, the precision of Swarm satellite obit radial, tangential and normal was improved in varying degrees, especially for the radial and normal most obviously, improved on average by 31.6% and 32.0%, respectively. At the same time, the systemic deviation of the orbit reduced significantly, especially for the radial and normal, reduced on average by 65.0% and 54.7%, respectively. © 2016, Surveying and Mapping Press. All right reserved.
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页码：803 / 809
页数：6
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