Ground based GNSS-R observations for soil moisture

CORC > 武汉物理与数学研究所 > 中国科学院武汉物理与数学研究所 > 2011年以前论文发表（包括2011年）

	Ground based GNSS-R observations for soil moisture
	Yan Song-Hua 1,2; Gong Jian-Ya 2; Zhang Xun-Xie 3; Li Dong-Xiu 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011-11-01
卷号	54 期号:11 页码:2735-2744
关键词	GNSS-R Soil moisture Ground based experiment Soil dielectric constant
产权排序	第三
英文摘要	The ground-based GNSS-R experiments are more favorable than the airborne experiments for research. Since the antennas are set low in ground-based experiments, the reflecting areas are much smaller than that in airborne experiments, so in these small areas the soil has nearly the same soil structure including soil texture, soil moisture and soil surface roughness, then the precision of the GNSS-R inversion can be improved. In this paper, the principle of soil moisture measuring by GNSS-R is described. First the influence on reflected signal power by ionosphere and neutrosphere is eliminated by normalized processing, then the soil moisture is calculated based on geometric optics approximation and dielectric models for the soil. In order to prove the accuracy of GNSS-R observation a field experiment was completed in Wuhan, in which a soil moisture tester (Time Delay Reflectometry-TDR) was used to observe together with the GNSS-R receiver. Comparison between TDR and GNSS-R observations at different sites and times shows that the average error is small. Therefore the ground based experiment is important for quantitative retrieval of soil moisture, and it also can provide good initial conditions for widespread soil moisture monitoring if using GNSS-R receiver network.
学科主题	原子分子物理学
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geochemistry & Geophysics
研究领域[WOS]	Geochemistry & Geophysics
关键词[WOS]	MICROWAVE DIELECTRIC BEHAVIOR ; REFLECTED SIGNALS ; WATER-CONTENT ; WET SOIL ; GPS ; MODELS ; PERMITTIVITY
收录类别	SCI
语种	英语
WOS记录号	WOS:000297535900003
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/1924]
专题	武汉物理与数学研究所_2011年以前论文发表（包括2011年）
作者单位	1.Wuhan Univ, Sch Elect Informat, Wuhan 430079, Peoples R China 2.State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Yan Song-Hua,Gong Jian-Ya,Zhang Xun-Xie,et al. Ground based GNSS-R observations for soil moisture[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(11):2735-2744.
APA	Yan Song-Hua,Gong Jian-Ya,Zhang Xun-Xie,&Li Dong-Xiu.(2011).Ground based GNSS-R observations for soil moisture.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(11),2735-2744.
MLA	Yan Song-Hua,et al."Ground based GNSS-R observations for soil moisture".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.11(2011):2735-2744.