气候变化领域集成服务门户(CCPortal): Airborne observations of arctic-boreal water surface elevations from AirSWOT Ka-Band InSAR and LVIS LiDAR

CCPortal

DOI	10.1088/1748-9326/abadcc
	Airborne observations of arctic-boreal water surface elevations from AirSWOT Ka-Band InSAR and LVIS LiDAR
	Fayne J.V.; Smith L.C.; Pitcher L.H.; Kyzivat E.D.; Cooley S.W.; Cooper M.G.; Denbina M.W.; Chen A.C.; Chen C.W.; Pavelsky T.M.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	AirSWOT is an experimental airborne Ka-band radar interferometer developed by NASA-JPL as a validation instrument for the forthcoming NASA Surface Water and Ocean Topography (SWOT) satellite mission. In 2017, AirSWOT was deployed as part of the NASA Arctic Boreal Vulnerability Experiment (ABoVE) to map surface water elevations across Alaska and western Canada. The result is the most extensive known collection of near-nadir airborne Ka-band interferometric synthetic aperture radar (InSAR) data and derivative high-resolution (3.6 m pixel) digital elevation models to produce water surface elevation (WSE) maps. This research provides a synoptic assessment of the 2017 AirSWOT ABoVE dataset to quantify regional WSE errors relative to coincident in situ field surveys and LiDAR data acquired from the NASA Land, Vegetation, and Ice Sensor (LVIS) airborne platform. Results show that AirSWOT WSE data can penetrate cloud cover and have nearly twice the swath-width of LVIS as flown for ABoVE (3.2 km vs. 1.8 km nominal swath-width). Despite noise and biases, spatially averaged AirSWOT WSEs can be used to estimate sub-seasonal hydrologic variability, as confirmed with field GPS surveys and in situ pressure transducers. This analysis informs AirSWOT ABoVE data users of known sources of measurement error in the WSEs as influenced by radar parameters including incidence angle, magnitude, coherence, and elevation uncertainty. The analysis also provides recommended best practices for extracting information from the dataset by using filters for these four parameters. Improvements to data handing would significantly increase the accuracy and spatial coverage of future AirSWOT WSE data collections, aiding scientific surface water studies, and improving the platform’s capability as an airborne validation instrument for SWOT. © 2020 The Author(s).
英文关键词	ABoVE; AirSWOT; Arctic lakes; InSAR; LiDAR; LVIS; Water surface elevation
语种	英语
scopus关键词	NASA; Optical radar; Radar measurement; Surveys; Synthetic aperture radar; Topography; Uncertainty analysis; Airborne observations; Airborne platforms; Airborne validation; Digital elevation model; Extracting information; Interferometric synthetic aperture radars; Satellite mission; Water surface elevations; Surface waters; cloud cover; data set; digital elevation model; elevation; GPS; interferometer; model validation; pixel; radar; surface water; synthetic aperture radar; Alaska; Canada; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153603
作者单位	Department of Geography, University of California, Los Angeles, CA 90095, United States; Department of Earth, Environmental and Planetary Sciences, Institute at Brown for Environment and Society, Brown University, Providence, RI 02912, United States; National Aeronautics and Space Administration-Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Department of Geological Sciences, University of North Carolina, Chapel Hill, Chapel Hill, NC 02912, United States
推荐引用方式 GB/T 7714	Fayne J.V.,Smith L.C.,Pitcher L.H.,et al. Airborne observations of arctic-boreal water surface elevations from AirSWOT Ka-Band InSAR and LVIS LiDAR[J],2020,15(10).
APA	Fayne J.V..,Smith L.C..,Pitcher L.H..,Kyzivat E.D..,Cooley S.W..,...&Pavelsky T.M..(2020).Airborne observations of arctic-boreal water surface elevations from AirSWOT Ka-Band InSAR and LVIS LiDAR.Environmental Research Letters,15(10).
MLA	Fayne J.V.,et al."Airborne observations of arctic-boreal water surface elevations from AirSWOT Ka-Band InSAR and LVIS LiDAR".Environmental Research Letters 15.10(2020).