Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL077905 |
Soil Moisture Sensing Using Spaceborne GNSS Reflections: Comparison of CYGNSS Reflectivity to SMAP Soil Moisture | |
Chew, C. C.1; Small, E. E.2 | |
2018-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:9页码:4049-4057 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This paper quantifies the relationship between forward scattered L-band Global Navigation Satellite System (GNSS) signals, recorded by the Cyclone Global Navigation Satellite System (CYGNSS) constellation and Soil Moisture Active Passive (SMAP) soil moisture (SM). Although designed for tropical ocean surface wind sensing, the CYGNSS receivers also record GNSS reflections over land. The CYGNSS observations of reflection power are compared to SMAP SM between March 2017 and February 2018. A strong, positive linear relationship exists between changes in CYGNSS reflectivity and changes in SMAP SM, but not between the absolute magnitudes of the two observations. The sensitivity of CYGNSS reflectivity to SM varies spatially and can be used to convert reflectivity to estimates of SM. The unbiased root-mean-square difference between daily averaged CYGNSS-derived SM and SMAP SM is 0.045cm(3)/cm(3) and is similarly low between CYGNSS and in situ SM. These results show that CYGNSS, and future GNSS reflection missions, could provide global SM observations. |
英文关键词 | soil moisture remote sensing GNSS bistatic radar |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434111700034 |
WOS关键词 | RETRIEVAL ; VALIDATION ; SENTINEL-1 ; SCATTERING ; SIGNALS ; SURFACE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29108 |
专题 | 气候变化 |
作者单位 | 1.Univ Corp Atmospher Res, Boulder, CO 80305 USA; 2.Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Chew, C. C.,Small, E. E.. Soil Moisture Sensing Using Spaceborne GNSS Reflections: Comparison of CYGNSS Reflectivity to SMAP Soil Moisture[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(9):4049-4057. |
APA | Chew, C. C.,&Small, E. E..(2018).Soil Moisture Sensing Using Spaceborne GNSS Reflections: Comparison of CYGNSS Reflectivity to SMAP Soil Moisture.GEOPHYSICAL RESEARCH LETTERS,45(9),4049-4057. |
MLA | Chew, C. C.,et al."Soil Moisture Sensing Using Spaceborne GNSS Reflections: Comparison of CYGNSS Reflectivity to SMAP Soil Moisture".GEOPHYSICAL RESEARCH LETTERS 45.9(2018):4049-4057. |
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