Extended Data Fig. 1: The Sentinel-1 SAR imagery (IW GRD product) covers most coastal waters but does not sample most of the open ocean. | Nature

Extended Data Fig. 1: The Sentinel-1 SAR imagery (IW GRD product) covers most coastal waters but does not sample most of the open ocean.

From: Satellite mapping reveals extensive industrial activity at sea

Extended Data Fig. 1

a, The extent and frequency of SAR acquisitions is determined by the mission priorities. b, The area of the ocean imaged every day by the Sentinel-1 GRD product (using a 12-day rolling average) depended on whether one satellite was imaging the ocean (S1A, October 2014 to present) or two (S1A and S1B, September 2016 to December 2017). S1B stopped operating on 23 December 2021.

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