Supraglacial lakes derived from Sentinel-1 SAR imagery over the Watson basin on the Greenland Ice Sheet.

<p>An experimental dataset produced for the 4D-Greenland project, one of the Polar+ projects funded by the&nbsp;European Space Agency. The dataset provides a classification of&nbsp;supraglacial lake extent, derived using Sentinel-1 SAR imagery, over the Watson case study site.&nbsp;The dataset is produced using a dynamic thresholding approach (Miles et al 2018).&nbsp;</p> <p>The dataset is produced for the period May 2017- Sept 2019. The temporal resolution of the dataset is approximately fortnightly (subject to methodological limitations) and is delivered as rasters in GeoTIFF format (epsg:3413). Raster pixels are denoted as: 0 where no surface water was detected; 1 where either HH or HV polarisation detected a backscatter signature representative of surface water; 2 where both HH and HV polarisations detected a backscatter signature representative of surface water; or 999 where the signal has been saturated and the output cannot distinguish if the signal is due to melt or other surface characteristics with the same backscattered signature.&nbsp;</p> <p>The naming convention indicates the original SAR tile used in the analysis and is identified by the sequence of fields described here:</p> <p>&lt;product_type&gt;_&lt;mission&gt;_&lt;mode&gt;_&lt;product&gt;_&lt;polarisation&gt;_&lt;starttime&gt;_&lt;endtime&gt;_&lt;orbitnumber&gt;_&lt;dataID&gt;_&lt;image&gt;.fileextension</p> <p>For example:</p> <p>extent_S1B_EW_GRDH_1SDH_20180811T202931_20180811T203031_012220_016839_916F.tif</p>