气候变化领域集成服务门户(CCPortal): Validation of Sentinel-3A SAR mode sea level anomalies around the Australian coastal region

CCPortal

DOI	10.1016/j.rse.2019.111548
	Validation of Sentinel-3A SAR mode sea level anomalies around the Australian coastal region
	Peng F.; Deng X.
发表日期	2020
ISSN	00344257
卷号	237
英文摘要	The Synthetic Aperture Radar (SAR) mode sea level anomalies (SLAs) of Sentinel-3A altimetry mission around the Australian coastal region were validated using eight in situ tide gauge sea level records and retracked Jason-3 datasets from a modified Brown-peaky (MBP) retracker. The MBP is a modified version of our existing Brown-peaky retracker aimed at enhancing BP's performance. We compared the noise of Sentinel-3A SLAs averaged across three posting rates (i.e. 1 Hz, 2 Hz and 4 Hz) with the 1 Hz noise of MBP-derived Jason-3 SLAs. At distances >10 km from the coast, the noise level of 1 Hz Sentinel-3A SLAs (~1.2 cm) is lower than that of the MBP-retracked Jason-3 SLAs (~1.7 cm). Moreover, the noise level of 2 Hz Sentinel-3A SLAs is comparable to that of the 1 Hz MBP-derived Jason-3 dataset, indicating that Sentinel-3A can provide precise SLAs at finer spatial scales. The Root Mean Square Error (RMSE) of differences between the tide gauge SLA time series and the equivalent SLA time series at each along-track altimeter point was used to assess pointwise data quality. For both Sentinel-3A and MBP-retracked Jason-3, the along-track RMSEs of 20 Hz SLAs vary between 0.05 m and 0.2 m. The mean and standard deviation (STD) of 1 Hz SLA differences at crossover points were computed for each individual altimetry mission to assess overall data quality. When compared with the crossover analysis results, the quality of Sentinel-3A SLAs is superior to that of the retracked Jason-3 dataset in terms of smaller STDs at crossover points (8.8 cm vs. 10.7 cm). © 2019
英文关键词	Australian coastal zone; Modified Brown-peaky retracker; Satellite altimetry; Sea level anomaly; Sentinel-3A; Validation
语种	英语
scopus关键词	Coastal zones; Mean square error; Synthetic aperture radar; Tide gages; Time series; Modified Brown-peaky retracker; Satellite altimetry; Sea level anomaly; Sentinel-3A; Validation; Sea level; coastal zone; data quality; data set; Jason; model validation; noise; satellite altimetry; sea level change; Sentinel; synthetic aperture radar; tide gauge; Australia
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179552
作者单位	School of Engineering, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
推荐引用方式 GB/T 7714	Peng F.,Deng X.. Validation of Sentinel-3A SAR mode sea level anomalies around the Australian coastal region[J],2020,237.
APA	Peng F.,&Deng X..(2020).Validation of Sentinel-3A SAR mode sea level anomalies around the Australian coastal region.Remote Sensing of Environment,237.
MLA	Peng F.,et al."Validation of Sentinel-3A SAR mode sea level anomalies around the Australian coastal region".Remote Sensing of Environment 237(2020).