Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment

The altimetric quality and the along-track spatial resolution are the critical parameters to characterize the performance of interferometric global navigation satellite systems reflectometry (iGNSS-R) sea surface altimetry, which is closely related to each other through signal processing time. Among...

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Autores principales:	Zongqiang Liu, Wei Zheng, Fan Wu, Guohua Kang, Xuezhi Sun, Qiang Wang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	interferometric global navigation satellite systems reflectometry (iGNSS-R) altimetric quality along-track spatial resolution airborne experiment altimetric precision altimetric accuracy Science Q
Acceso en línea:	https://doaj.org/article/45a09af04d4242a4ad004a8e6a5b3b48
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spelling	oai:doaj.org-article:45a09af04d4242a4ad004a8e6a5b3b482021-11-30T21:57:19ZRelationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment2296-646310.3389/feart.2021.730513https://doaj.org/article/45a09af04d4242a4ad004a8e6a5b3b482021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.730513/fullhttps://doaj.org/toc/2296-6463The altimetric quality and the along-track spatial resolution are the critical parameters to characterize the performance of interferometric global navigation satellite systems reflectometry (iGNSS-R) sea surface altimetry, which is closely related to each other through signal processing time. Among them, the quality of sea surface height (SSH) measurement includes precision and accuracy. In order to obtain higher altimetric quality in the observation area, a longer signal processing time is needed, which will lead to the loss of spatial resolution along the track. In contrast, higher along-track spatial resolution requires more intensive sampling, leading to unsatisfactory altimetric quality. In this study, taking the airborne iGNSS-R observation data as an example, the relationship between the altimetric quality and the along-track spatial resolution is analyzed from the perspectives of precision and accuracy. The results indicate that the reduction in the along-track spatial resolution will improve the altimetric quality. The accuracy range is 0.28–0.73 m, and the precision range is 0.24–0.65 m. However, this change is not linear, and the degree of altimetric quality improvement will decrease as the along-track spatial resolution worsens. The research results in this paper can provide a scientific reference for the configuration of parameters for future spaceborne iGNSS-R altimetry missions.Zongqiang LiuZongqiang LiuWei ZhengWei ZhengWei ZhengFan WuGuohua KangXuezhi SunQiang WangFrontiers Media S.A.articleinterferometric global navigation satellite systems reflectometry (iGNSS-R)altimetric qualityalong-track spatial resolutionairborne experimentaltimetric precisionaltimetric accuracyScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	interferometric global navigation satellite systems reflectometry (iGNSS-R) altimetric quality along-track spatial resolution airborne experiment altimetric precision altimetric accuracy Science Q
spellingShingle	interferometric global navigation satellite systems reflectometry (iGNSS-R) altimetric quality along-track spatial resolution airborne experiment altimetric precision altimetric accuracy Science Q Zongqiang Liu Zongqiang Liu Wei Zheng Wei Zheng Wei Zheng Fan Wu Guohua Kang Xuezhi Sun Qiang Wang Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment
description	The altimetric quality and the along-track spatial resolution are the critical parameters to characterize the performance of interferometric global navigation satellite systems reflectometry (iGNSS-R) sea surface altimetry, which is closely related to each other through signal processing time. Among them, the quality of sea surface height (SSH) measurement includes precision and accuracy. In order to obtain higher altimetric quality in the observation area, a longer signal processing time is needed, which will lead to the loss of spatial resolution along the track. In contrast, higher along-track spatial resolution requires more intensive sampling, leading to unsatisfactory altimetric quality. In this study, taking the airborne iGNSS-R observation data as an example, the relationship between the altimetric quality and the along-track spatial resolution is analyzed from the perspectives of precision and accuracy. The results indicate that the reduction in the along-track spatial resolution will improve the altimetric quality. The accuracy range is 0.28–0.73 m, and the precision range is 0.24–0.65 m. However, this change is not linear, and the degree of altimetric quality improvement will decrease as the along-track spatial resolution worsens. The research results in this paper can provide a scientific reference for the configuration of parameters for future spaceborne iGNSS-R altimetry missions.
format	article
author	Zongqiang Liu Zongqiang Liu Wei Zheng Wei Zheng Wei Zheng Fan Wu Guohua Kang Xuezhi Sun Qiang Wang
author_facet	Zongqiang Liu Zongqiang Liu Wei Zheng Wei Zheng Wei Zheng Fan Wu Guohua Kang Xuezhi Sun Qiang Wang
author_sort	Zongqiang Liu
title	Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment
title_short	Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment
title_full	Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment
title_fullStr	Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment
title_full_unstemmed	Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment
title_sort	relationship between altimetric quality and along-track spatial resolution for ignss-r sea surface altimetry: example for the airborne experiment
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/45a09af04d4242a4ad004a8e6a5b3b48
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Relationship Between Altimetric Quality and Along-Track Spatial Resolution for iGNSS-R Sea Surface Altimetry: Example for the Airborne Experiment

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