Working Paper Dataset Version 2 This version is not peer-reviewed

A Global Sea State Dataset from Spaceborne Synthetic Aperture Radar Wave Mode Data

Version 1 : Received: 17 January 2020 / Approved: 18 January 2020 / Online: 18 January 2020 (09:45:38 CET)
Version 2 : Received: 15 May 2020 / Approved: 15 May 2020 / Online: 15 May 2020 (18:22:41 CEST)

A peer-reviewed article of this Preprint also exists.

Li, X., Huang, B. A global sea state dataset from spaceborne synthetic aperture radar wave mode data. Sci Data 7, 261 (2020). Li, X., Huang, B. A global sea state dataset from spaceborne synthetic aperture radar wave mode data. Sci Data 7, 261 (2020).


This dataset consists of integral sea state parameters of significant wave height (SWH) and mean wave period (zero-upcrossing mean wave period, MWP) data derived from the advanced synthetic aperture radar (ASAR) onboard the ENVISAT satellite over its full life cycle (2002-2012) covering the global ocean. Both parameters are calibrated and validated against buoy data. A cross-validation between the ASAR SWH and radar altimeter (RA) data is also performed to ensure that the SAR-derived wave height data are of the same quality as the RA data. These data are stored in the standard NetCDF format, which are produced for each ASAR wave mode Level1B data provided by the European Space Agency. This is the first time that a full sea state product in terms of both the SWH and MWP has been derived from spaceborne SAR data over the global ocean for a decadal temporal scale.


synthetic aperture radar (SAR); wave mode; ocean waves


Environmental and Earth Sciences, Oceanography

Comments (1)

Comment 1
Received: 15 May 2020
Commenter: Xiaoming Li
Commenter's Conflict of Interests: Author
Comment: A major change of the current dataset compared with previous version is:
 In the previous version of the data, the ASAR wave mode who have the factor below 1.05 are treated as good data for retrieval of sea state parameters. In the new version (version 1.1), the threshold was loosened to 1.50. However, for the data whose homogeneity factor are between 1.05 and 1.50 are flagged as "suspect", indicating these data remain further investigation on their retrievals of sea state parameters. 
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