add toolset explanation

mundialis · Jan 26, 2022 · 651987f · 651987f
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commit 651987f
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diff --git a/i.sentinel_1.html b/i.sentinel_1.html
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 <h2>NAME</h2>
 
-<em><b>i.sentinel_1</b></em> - Toolset for downloading and processing of Copernicus
-Sentinel-1 data.
+<em><b>i.sentinel_1</b></em> is a GRASS GIS addon toolset that searches, downloads, imports
+and preprocesses SAR data from the <a href="https://asf.alaska.edu/">Alaska Satellite Facility</a>
+using ESA's <a href="https://step.esa.int/main/download/snap-download/">SNAP</a>
+software. If a region is covered by multiple Sentinel-1 GRD tiles, a mosaic can be created.
 
 <h2>KEYWORDS</h2>
 <a href="https://grass.osgeo.org/grass-stable/manuals/raster.html">imagery</a>, <a href="https://grass.osgeo.org/grass-stable/manuals/topic_import.html">import</a>, <a href="keywords.html#satellite">satellite</a>, <a href="keywords.html#Sentinel">Sentinel</a>