气候变化领域集成服务门户(CCPortal): On the Performance of Sentinel-3 Altimetry Over New Reservoirs: Approaches to Determine Onboard A Priori Elevation

CCPortal

DOI	10.1029/2020GL088770
	On the Performance of Sentinel-3 Altimetry Over New Reservoirs: Approaches to Determine Onboard A Priori Elevation
	Zhang X.; Jiang L.; Kittel C.M.M.; Yao Z.; Nielsen K.; Liu Z.; Wang R.; Liu J.; Andersen O.B.; Bauer-Gottwein P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Satellite radar altimetry has become an important data source supplementing in situ water level. For practical reasons, a radar altimeter can only record reflected echoes within its range window. Therefore, water surface elevation must fall within the range window. To this end, the Sentinel-3 radar altimetry mission is configured with a new tracking function (i.e., open loop) to position its range window based on an onboard a priori elevation of ground targets. We found that Sentinel-3 is unable to observe recently built reservoirs due to the incorrect onboard elevations. To overcome this issue, four approaches are proposed to improve the a priori elevation for inland water bodies, particularly reservoirs. These approaches can significantly increase data availability of Sentinel-3 over reservoirs and can be used to prepare the onboard elevations of reservoirs and lakes for future missions such as Sentinel-6, Sentinel-3C/-3D, and the Surface Water and Ocean Topography (SWOT) mission. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Radar; Surface waters; Topography; Water levels; Data availability; Future mission; Inland waters; Ocean topography; Radar altimetry; Satellite radar altimetry; Tracking function; Water surface elevations; Reservoirs (water); performance assessment; radar altimetry; reservoir; satellite data; Sentinel; tracking; water level
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169781
作者单位	Key Lab for Resources Use and Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Department of Environmental Engineering, Technical University of Denmark, Kongens Lyngby, Denmark; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China; DTU Space, National Space Institute, Technical University of Denmark, Kongens Lyngby, Denmark
推荐引用方式 GB/T 7714	Zhang X.,Jiang L.,Kittel C.M.M.,et al. On the Performance of Sentinel-3 Altimetry Over New Reservoirs: Approaches to Determine Onboard A Priori Elevation[J],2020,47(17).
APA	Zhang X..,Jiang L..,Kittel C.M.M..,Yao Z..,Nielsen K..,...&Bauer-Gottwein P..(2020).On the Performance of Sentinel-3 Altimetry Over New Reservoirs: Approaches to Determine Onboard A Priori Elevation.Geophysical Research Letters,47(17).
MLA	Zhang X.,et al."On the Performance of Sentinel-3 Altimetry Over New Reservoirs: Approaches to Determine Onboard A Priori Elevation".Geophysical Research Letters 47.17(2020).