DOI: 10.1002/2015GL064204
论文题名: Spaceborne GNSS reflectometry for ocean winds: First results from the UK TechDemoSat-1 mission
作者: Foti G. ; Gommenginger C. ; Jales P. ; Unwin M. ; Shaw A. ; Robertson C. ; Rosellõ J.
刊名: Geophysical Research Letters
ISSN: 0094-9457
EISSN: 1944-9188
出版年: 2015
卷: 42, 期: 13 起始页码: 5435
结束页码: 5441
语种: 英语
英文关键词: GNSS reflectometry
; ocean wind speed
; TechDemoSat-1
Scopus关键词: Global positioning system
; Meteorological instruments
; NASA
; Orbits
; Radar
; Reflection
; Reflectometers
; Salinity measurement
; Storms
; Wind
; Bistatic radar equation
; Disaster monitoring
; Global Navigation Satellite Systems
; Low Earth Orbiting
; Ocean surface winds
; Ocean winds
; Reflectometry
; TechDemoSat-1
; Signal to noise ratio
; algorithm
; ASCAT
; data quality
; Doppler radar
; GNSS
; GPS
; NSCAT
; reflectometry
; signal-to-noise ratio
; SIR
; wind velocity
; United Kingdom
英文摘要: First results are presented for ocean surface wind speed retrieval from reflected GPS signals measured by the low Earth orbiting UK TechDemoSat-1 satellite (TDS-1). Launched in July 2014, TDS-1 provides the first new spaceborne Global Navigation Satellite System-Reflectometry (GNSS-R) data since the pioneering UK-Disaster Monitoring Mission (UK-DMC) experiment in 2003. Examples of onboard-processed delay-Doppler maps reveal excellent data quality for winds up to 27.9m/s. Collocated Advanced Scatterometer (ASCAT) winds are used to develop and evaluate a wind speed algorithm based on signal-to-noise ratio (SNR) and the bistatic radar equation. For SNRs greater than 3dB, wind speed is retrieved without bias and a precision around 2.2m/s between 3 and 18m/s even without calibration. Exploiting lower SNR signals, however, requires good knowledge of the antenna beam, platform attitude, and instrument gain setting. This study demonstrates the capabilities of low-cost, low-mass, and low-power GNSS-R receivers ahead of their launch on the NASA Cyclone GNSS (CYGNSS) constellation in 2016. Key Points New global spaceborne Global Navigation Satellite System-Reflectometry data set New GNSS-R wind speed inversion algorithm and validation against ASCAT wind data Unbiased winds with 2.2m/s precision for high SNR signals without calibration. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938212971&doi=10.1002%2f2015GL064204&partnerID=40&md5=7da975c448501ce1642276c7c21321e7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9072
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: National Oceanography Centre, Southampton, United Kingdom
Recommended Citation:
Foti G.,Gommenginger C.,Jales P.,et al. Spaceborne GNSS reflectometry for ocean winds: First results from the UK TechDemoSat-1 mission[J]. Geophysical Research Letters,2015-01-01,42(13).