Significant Wave Height

The Significant Wave Height (SWH) is the average wave height (from trough to crest) of the highest third (33.33%) of the waves in a given sample period.

The SENTINEL-3 mission is able to monitor wave heights from 0 to 20 m.

The SENTINEL-3 mission SWH goal accuracy is 4% (8 cm at 2 m SWH) for Near Real-Time (NRT) products and 1% (2 cm at 2 m SWH) for Slow Time Critical (STC products).

Figure 1
Gridded maps of Sentinel-3A SARM (top panel) SWH from April 2016 to December 2019. Gridded maps of Sentinel-3B SARM (bottom panel) SWH from November 2018 to December 2019.

The marine sea state (SWH or Hs) product is a critical product for all maritime safety and rescue operations.

Figure 1
S3-B SLSTR False color and S3-b SRAL SWH observed the Dorian hurricane over Bahamas on 2nd of September. Sentinel-3B altimeter measured waves about ten meters high.

Navigation Menu