Canonical transform method for GPS/LEO radio occultation

	Canonical transform method for GPS/LEO radio occultation
	Xu Xian-Sheng 1; Guo Peng2 ; Hong Zhen-Jie 3; Wu Jiang-Fei 4
刊名	ACTA PHYSICA SINICA
	2013-04-01
卷号	62 期号:7 页码:8
关键词	radio occultation atmospheric multipath MPS technique CT method
英文摘要	Under the atmospheric multipath conditions, both canonical transform (CT) and full spectrum inversion (FSI) method can solve the problem of calculating bending angle profiles within the multipath area. The atmospheric propagation of GPS signals under atmospheric multipath conditions is simulated using multiple phase screens (MPS) technique. Bending angle profiles computed by CT method are compared with corresponding solutions to Abel integral (taken as the true value). The results show that CT method is close to the true value in the multipath area. The retrieval accuracy of CT method is degraded to some extent when Gaussian noises are added to the phase of simulated signal. About 4500 COSMIC (Constellation Observing System for Meteorology, Ionosphere and Climate) atmPhs profiles from DOY (day of year) 71 to DOY 73 in 2007 are retrieved by CT method. Statistical comparisons of the retrieved refractivity profiles, together with atmPrf data (retrieved by FSI method), with those from corresponding ECMWF (European Centre for Medium-Range Weather Forecasts) analysis show that CT method contains greater systematic negative bias than atmPrf data below 5 km. A possible reason is that the signal aperture is decreased for back-propagating the signal from LEO position to the back-propagation plane in CT method. The small aperture means low accuracy in the refractivity. The influence of signal truncation on both retrieval accuracy and occultation number is also discussed.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	LOWER TROPOSPHERE ; INVERSION ; SIGNALS
收录类别	SCI
语种	英语
WOS记录号	WOS:000318151300077
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18019]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Zhejiang Univ, Ningbo Inst Technol, Ningbo 315100, Zhejiang, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Wenzhou Univ, Sch Math & Informat Sci, Wenzhou 325027, Zhejiang, Peoples R China 4.Informat Engn Univ, Inst Geospatial Informat, Zhengzhou 450052, Peoples R China
推荐引用方式 GB/T 7714	Xu Xian-Sheng,Guo Peng,Hong Zhen-Jie,et al. Canonical transform method for GPS/LEO radio occultation[J]. ACTA PHYSICA SINICA,2013,62(7):8.
APA	Xu Xian-Sheng,Guo Peng,Hong Zhen-Jie,&Wu Jiang-Fei.(2013).Canonical transform method for GPS/LEO radio occultation.ACTA PHYSICA SINICA,62(7),8.
MLA	Xu Xian-Sheng,et al."Canonical transform method for GPS/LEO radio occultation".ACTA PHYSICA SINICA 62.7(2013):8.