{
 "culture": "en-US",
 "name": "sentinel1",
 "guid": "7F73EE28-DB55-44B2-B6D9-F81AA0299943",
 "catalogPath": "",
 "snippet": "Water Extents and RGB Imagery (Copernicus Sentinel-1) for Tropical Storm Sara 2024",
 "description": "<div style='text-align:Left;'><div><div><p><span style='font-weight:bold;'>Dates of Images:<\/span><\/p><p><span>Pre-Event: 11/4/2024, 11/6/2024, 11/11/2024<\/span><\/p><p><span>Post-Event: 11/16/2024, 11/18/2024<\/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. Set time slider to most recent interval and click on area of interest to identify date of last pass.<\/span><\/p><p><span style='font-weight:bold;'>Summary:<\/span><\/p><p><span>The Alaska Satellite Facility has developed false color Red, Green, Blue (RGB) and Radiometrically Terrain-Correct (RTC) composites and surface water extent products of the Sentinel-1A/B Synthetic Aperture Radar (SAR) instrument which assigns the co- and cross-polarization information to a channel in the composite. When used to support a flooding event, areas in blue denotes water present at the time of the satellite overpass before or after the start of the flooding event.<\/span><\/p><p><span>Sentinel-1 RGB Decomposition of RTC VV and VH imagery over United States coastlines. Blue areas have low returns in VV and VH (smooth surfaces such as calm water, but also frozen/crusted soil or dry sand), Green areas have high returns in VH (volume scatterers such as vegetation or some types of snow/ice), and Red areas have relatively high VV returns and relatively low VH returns (such as urban or sparsely vegetated areas).<\/span><\/p><p><span style='font-weight:bold;'>Suggested Use:<\/span><\/p><p><span>In the RGB images, water appears in blue, vegetated areas in shades of green and urban areas in bright orange. It is recommended to use this product with ancillary information to derive flooded areas.<\/span><\/p><p><span>In the Water Extent images, data is classified from the above imagery shows water, including flooded areas, as blue.<\/span><\/p><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 style='font-weight:bold;'>Resolution:<\/span><\/p><p><span>20 meters<\/span><\/p><p><span style='font-weight:bold;'>Esri REST Endpoint:<\/span><\/p><p><span>See URL on the right.<\/span><\/p><p><span style='font-weight:bold;'>WMS Endpoint:<\/span><\/p><p><a href='https://maps.disasters.nasa.gov/ags04/services/tropical_storm_sara_202411/sentinel1/MapServer/WMSServer' rel='nofollow ugc' target='_blank'>https://maps.disasters.nasa.gov/ags04/services/tropical_storm_sara_202411/sentinel1/MapServer/WMSServer<\/a><span style='font-weight:bold;'><\/span><\/p><p><span><\/span><\/p><p><span style='font-weight:bold;'>Data Download:<\/span><\/p><p><a href='https://maps.disasters.nasa.gov/download/gis_products/event_specific/2024/tropical_storm_sara_202411/sentinel1/' rel='nofollow ugc' style='text-decoration:underline;'><span>https://maps.disasters.nasa.gov/download/gis_products/event_specific/2024/tropical_storm_sara_202411/sentinel1/<\/span><\/a><\/p><\/div><\/div><\/div>",
 "summary": "Water Extents and RGB Imagery (Copernicus Sentinel-1) for Tropical Storm Sara 2024",
 "title": "Water Extents and RGB Imagery (Copernicus Sentinel-1) for Tropical Storm Sara 2024",
 "tags": [
  "NASA",
  "NASA Disasters Program",
  "Tropical Storm",
  "Sara",
  "Costa Rica",
  "Nicaragua",
  "Copernicus",
  "Sentinel-1",
  "ESA",
  "Alaska Satellite Facitilty"
 ],
 "type": "Map Service",
 "typeKeywords": [
  "Data",
  "Service",
  "Map Service",
  "ArcGIS Server"
 ],
 "thumbnail": "thumbnail/thumbnail.png",
 "url": "",
 "extent": [
  [
   -87.0001836498023,
   7.01921966621398
  ],
  [
   -80.3966766577785,
   12.7605807600093
  ]
 ],
 "minScale": 0,
 "maxScale": 1.7976931348623157E308,
 "spatialReference": "WGS_1984_UTM_Zone_16N",
 "accessInformation": "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.",
 "licenseInfo": "<DIV STYLE=\"text-align:Left;\"><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 (2024) processed by ESA\"<\/SPAN><\/P><P><SPAN /><\/P><P><SPAN /><\/P><P><SPAN /><\/P><P><SPAN /><\/P><\/DIV>"
}