20251008 13324200 1.0 TRUE 150000000 5000 ItemDescription Sentinel-1 Water Extent and Water Extent Difference for May 2024 Texas Floods <div style='text-align:Left;'><div><div><p><span style='font-weight:bold;'>Dates of Images:</span></p><p><span>4/30/2024, 5/7/2024, 5/12/2024</span></p><p><span /></p><p><span style='font-weight:bold;'>Date of Next Image:</span></p><p><span>Varies by region, typically 12 days since previous pass.</span></p><p><span /></p><p><span style='font-weight:bold;'>Summary:</span></p><p><span>The Alaska Satellite Facility has developed surface water extent products of the Sentinel-1A/B Synthetic Aperture Radar (SAR) instrument. These images can be used to see where water is located at the time of the satellite overpass. This product shows all water detected and does not differentiate between normal water and flood water. To determine where flooding may have occurred, combine this layer with a reference water layer.</span></p><p><span>The water extent difference maps shown here were created by subtracting the water extent of the first date from the water extent of the second date to show what changes, if any, occurred in the water extent.</span></p><p><p><span style='font-weight:bold;'>Suggested Use:</span></p><p><span>Water extent difference: </span></p><ul><li><p><span>Light Blue: Water Present in the Second Date Only</span></p></li><li><p><span>Dark Blue: Water Present in Both Dates</span></p></li><li><p><span>Orange: Water Present in the First Date Only</span></p></li></ul><p><span style='font-weight:bold;'>Satellite/Sensor:</span></p><p><span>Synthetic Aperture Radar on European Space Agency's (ESA) Copernicus Sentinel-1A satellite</span></p><p><span /></p><p><span style='font-weight:bold;'>Resolution:</span></p><p><span>30 meters</span></p><p><span /></p><p><span style='font-weight:bold;'>Service URL:</span></p><p><span /></p><p><span style='font-weight:bold;'>WMS Endpoint:</span></p></div></div></div></p> NASA/MSFC, USGS, ESA Copernicus. Sentinel data used in this derived product, contains modified Copernicus Sentinel data (2019-2022), processed by ESA, Alaska Satellite Facility. SENTINEL1_WATER NASA NASA Disasters Program Texas Flood Sentinel-1 Copernicus ESA Alaska Satellite Facility HydroSAR <div style='text-align:Left;'><div><p><span>NASA data and products are freely available to federal, state, public, non-profit and commercial users. This information can be experimental- or research-grade data products and may not be appropriate for operational use. These NASA data products, services, and the Disasters Mapping Portal are intended to aid decision makers and enhance situational awareness, but these data are not guaranteed to be consistently available or routinely updated. Please cite the information according to the direction provided in the metadata. Use of this product should include: "Contains modified Copernicus Sentinel data (2019-2024) processed by ESA"</span></p></div></div> 20251008