作者:Zhang, BB (Zhang, Bingbing)^{[ 1 ]} ; Wang, ZT (Wang, Zhengtao)^{[ 1 ]} ; Zhou, L (Zhou, Lv)^{[ 1,2 ]} ;Feng, JD (Feng, Jiandi)^{[ 1 ]} ; Qiu, YD (Qiu, Yaodong)^{[ 1 ]} ; Li, FP (Li, Fupeng)^{[ 1 ]}

SENSORS

卷: 17期: 3文献号: 635

DOI: 10.3390/s17030635

出版年: MAR 2017

摘要

Swarm is a European Space Agency (ESA) project that was launched on 22 November 2013, which consists of three Swarm satellites. Swarm precise orbits are essential to the success of the above project. This study investigates how well Swarm zero-differenced (ZD) reduced-dynamic orbit solutions can be determined using space-borne GPS data and optimized pseudo-stochastic pulses under high ionospheric activity. We choose Swarm space-borne GPS data from 1-25 October 2014, and Swarm reduced-dynamic orbits are obtained. Orbit quality is assessed by GPS phase observation residuals and compared with Precise Science Orbits (PSOs) released by ESA. Results show that pseudo-stochastic pulses with a time interval of 6 min and a priori standard deviation (STD) of 10(-2) mm/s in radial (R), along-track (T) and cross-track (N) directions are optimized to Swarm ZD reduced-dynamic precise orbit determination (POD). During high ionospheric activity, the mean Root Mean Square (RMS) of Swarm GPS phase residuals is at 9-11 mm, Swarm orbit solutions are also compared with Swarm PSOs released by ESA and the accuracy of Swarm orbits can reach 2-4 cm in R, T and N directions. Independent Satellite Laser Ranging (SLR) validation indicates that Swarm reduced-dynamic orbits have an accuracy of 2-4 cm. Swarm-B orbit quality is better than those of Swarm-A and Swarm-C. The Swarm orbits can be applied to the geomagnetic, geoelectric and gravity field recovery.

关键词

作者关键词:Swarm; precise orbit determination; reduced-dynamic method; space-borne dual-frequency GPS data; pseudo-stochastic pulses; orbit accuracy

KeyWords Plus:SATELLITE CONSTELLATION; GRACE; MISSION; CHAMP; LEO; CODE

作者信息

通讯作者地址: Wang, ZT (通讯作者)

地址:

电子邮件地址:bbzhang@whu.edu.cn; ztwang@whu.edu.cn; zhoulv@whu.edu.cn; jdfeng@whu.edu.cn;ydqiu@whu.edu.cn; fpli@whu.edu.cn

基金资助致谢

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出版商

MDPI AG, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND

类别/分类

研究方向:Chemistry; Electrochemistry; Instruments & Instrumentation

Web of Science类别:Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation

文献信息

文献类型:Article

语种:English

入藏号: WOS:000398818700208

ISSN: 1424-8220

期刊信息

· Impact Factor (影响因子): 2.033