Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal

Abstract The upcoming Surface Water and Ocean Topography (SWOT) mission provides a promising opportunity for retrieval of high spatiotemporal resolution water surface height (WSH) over inland water bodies. To investigate the accuracy of SWOT derived WSH, the observations over Lake Baikal are simulat...

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Autores principales:	B. Du, J. C. Li, T. Y. Jin, M. Zhou, X. W. Gao
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2021
Materias:	SWOT radar altimetry water surface height Lake Baikal local cross‐calibration Astronomy QB1-991 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/f005691864f244bd94f2991c4af1d5dc
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spelling	oai:doaj.org-article:f005691864f244bd94f2991c4af1d5dc2021-11-23T21:03:07ZSynthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal2333-508410.1029/2021EA001990https://doaj.org/article/f005691864f244bd94f2991c4af1d5dc2021-11-01T00:00:00Zhttps://doi.org/10.1029/2021EA001990https://doaj.org/toc/2333-5084Abstract The upcoming Surface Water and Ocean Topography (SWOT) mission provides a promising opportunity for retrieval of high spatiotemporal resolution water surface height (WSH) over inland water bodies. To investigate the accuracy of SWOT derived WSH, the observations over Lake Baikal are simulated and a comprehensive evaluation is conducted in this study. Firstly, compared with Jason‐class altimeter WSH and in situ WSHs, the accuracy of SWOT KaRIn‐derived monthly WSHs and their spatiotemporal characteristics are analyzed. Secondly, a local cross‐calibration method is used to reduce the short wavelength roll error over lakes. The results show that, though SWOT has more observations than Jason‐class altimeter, the accuracy of the SWOT KaRIn‐derived monthly WSHs is difficult to be equivalent with those from Jason‐class altimeter, and varies with the number of duplicated observations, the spatial location and the time interval due to the effect of systematic erros and random errors, but can be significantly improved by local cross‐calibration method, especially at higher spatial resolutions after cross‐calibration associate with external nadir altimeter.B. DuJ. C. LiT. Y. JinM. ZhouX. W. GaoAmerican Geophysical Union (AGU)articleSWOTradar altimetrywater surface heightLake Baikallocal cross‐calibrationAstronomyQB1-991GeologyQE1-996.5ENEarth and Space Science, Vol 8, Iss 11, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	SWOT radar altimetry water surface height Lake Baikal local cross‐calibration Astronomy QB1-991 Geology QE1-996.5
spellingShingle	SWOT radar altimetry water surface height Lake Baikal local cross‐calibration Astronomy QB1-991 Geology QE1-996.5 B. Du J. C. Li T. Y. Jin M. Zhou X. W. Gao Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal
description	Abstract The upcoming Surface Water and Ocean Topography (SWOT) mission provides a promising opportunity for retrieval of high spatiotemporal resolution water surface height (WSH) over inland water bodies. To investigate the accuracy of SWOT derived WSH, the observations over Lake Baikal are simulated and a comprehensive evaluation is conducted in this study. Firstly, compared with Jason‐class altimeter WSH and in situ WSHs, the accuracy of SWOT KaRIn‐derived monthly WSHs and their spatiotemporal characteristics are analyzed. Secondly, a local cross‐calibration method is used to reduce the short wavelength roll error over lakes. The results show that, though SWOT has more observations than Jason‐class altimeter, the accuracy of the SWOT KaRIn‐derived monthly WSHs is difficult to be equivalent with those from Jason‐class altimeter, and varies with the number of duplicated observations, the spatial location and the time interval due to the effect of systematic erros and random errors, but can be significantly improved by local cross‐calibration method, especially at higher spatial resolutions after cross‐calibration associate with external nadir altimeter.
format	article
author	B. Du J. C. Li T. Y. Jin M. Zhou X. W. Gao
author_facet	B. Du J. C. Li T. Y. Jin M. Zhou X. W. Gao
author_sort	B. Du
title	Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal
title_short	Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal
title_full	Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal
title_fullStr	Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal
title_full_unstemmed	Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal
title_sort	synthesis analysis of swot karin‐derived water surface heights and local cross‐calibration of the baseline roll knowledge error over lake baikal
publisher	American Geophysical Union (AGU)
publishDate	2021
url	https://doaj.org/article/f005691864f244bd94f2991c4af1d5dc
work_keys_str_mv	AT bdu synthesisanalysisofswotkarinderivedwatersurfaceheightsandlocalcrosscalibrationofthebaselinerollknowledgeerroroverlakebaikal AT jcli synthesisanalysisofswotkarinderivedwatersurfaceheightsandlocalcrosscalibrationofthebaselinerollknowledgeerroroverlakebaikal AT tyjin synthesisanalysisofswotkarinderivedwatersurfaceheightsandlocalcrosscalibrationofthebaselinerollknowledgeerroroverlakebaikal AT mzhou synthesisanalysisofswotkarinderivedwatersurfaceheightsandlocalcrosscalibrationofthebaselinerollknowledgeerroroverlakebaikal AT xwgao synthesisanalysisofswotkarinderivedwatersurfaceheightsandlocalcrosscalibrationofthebaselinerollknowledgeerroroverlakebaikal
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Synthesis Analysis of SWOT KaRIn‐Derived Water Surface Heights and Local Cross‐Calibration of the Baseline Roll Knowledge Error Over Lake Baikal

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