Determination of ionospheric observables with precise point positioning

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	Determination of ionospheric observables with precise point positioning
	Zhang, Bao-Cheng ; Ou, Ji-Kun ; Li, Zi-Shen ; Yuan, Yun-Bin
刊名	Chinese Journal of Geophysics-Chinese Edition
	2011
期号	4 页码:950-957
中文摘要	In recent years, the Global Navigation Satellite System (GNSS) signals with extensive spatial coverage and temporal continuity have become an important source for ionosphere study. Determination of the ionospheric observables is the first step for GNSS-based ionosphere study, which is commonly done by combining the geometry-free linear combinations of carrier phase and code observations with leveling process to generate the so-called Leveled Ionospheric Observables (LIOs). However, the leveling process is vulnerable to the length of continuous satellite arc and receiver dependent model errors (e.g. multipath effects and measurement noise). In this paper, a strategy for determining the ionospheric observable with Precise Point Positioning (PPP) is proposed, and the resulted PPP Ionospheric Observables (PIOs) have coincidently identical forms with the LIOs. Different from the leveling process, the available IGS satellite orbits/clocks can be utilized by the PPP to effectively reduce the unknowns that have to be estimated, thus improving the accuracy of generation of ionospheric observables. Based on the short- and zero-baseline experiments, the improving reliability of PIOs with respect to LIOs is verified from comparing the spread of the between-receiver single difference of both ionospheric observables corresponding to different satellite arcs: in the cases of two representative days, the effect of receiver dependent model errors on the LIOs is respectively reduced to 44. 4% and 35. 7% of that on PIOs, which reveals that the PIOs would be more beneficial for ionosphere modeling and prediction.
原文出处	://WOS:000290065400009
公开日期	2012-04-11
内容类型	期刊论文
源URL	[http://ir.whigg.ac.cn/handle/342008/3519]
专题	测量与地球物理研究所_其他_期刊论文
推荐引用方式 GB/T 7714	Zhang, Bao-Cheng,Ou, Ji-Kun,Li, Zi-Shen,et al. Determination of ionospheric observables with precise point positioning[J]. Chinese Journal of Geophysics-Chinese Edition,2011(4):950-957.
APA	Zhang, Bao-Cheng,Ou, Ji-Kun,Li, Zi-Shen,&Yuan, Yun-Bin.(2011).Determination of ionospheric observables with precise point positioning.Chinese Journal of Geophysics-Chinese Edition(4),950-957.
MLA	Zhang, Bao-Cheng,et al."Determination of ionospheric observables with precise point positioning".Chinese Journal of Geophysics-Chinese Edition .4(2011):950-957.