SAR Data for the United States Coastlines (Copernicus Sentinel-1, Alaska Satellite Facility) for Hurricane Ian

Dates of Images:

9/20/2022 - 10/31/2022

Date of Next Image: 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.

Summary: The Alaska Satellite Facility has developed false color Red, Green, Blue (RGB) and Radiometrically Terrain-Correct (RTC) composites 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.

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).
To identify the date of an image either set the time slider to a 1 day interval or zoom in to AOI, set time slider to desired range and click on the imagery. The name will contain a full date and time in a format like this example:
S1A_IW_20210705T231453_DVR_RTC30_G_gpufed_27F4 The date and time would be 07/05/2021 at 23:14:53 UTC.

Additional SAR Information
Suggested Use: In this image, 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. 
Satellite/Sensor:  Synthetic Aperture Radar on European Space Agency's (ESA) Copernicus Sentinel-1A/B satellite NOTE: Sentinel-1B is no longer acquiring data and is only available into December 2021
Resolution: 30 meters

Credits:  Sentinel data used in this derived product, contains modified Copernicus Sentinel data (2019-2022), processed by ESA, Alaska Satellite Facility.

Esri REST Endpoint: RGB Product:
https://asf.img.arcgis.com/arcgis/rest/services/ASF_RTC/ASF_S1_RGB/ImageServer
RTC Product:

https://asf.img.arcgis.com/arcgis/rest/services/ASF_RTC/ASF_S1_RTC/ImageServer
Data Download:  Data can be downloaded via the Pop-Ups in the Web Map or through each service's attribute table.

Data and Resources

Field Value
dcat_issued 2022-09-28T18:29:38.000Z
dcat_modified 2022-09-28T18:37:22.000Z
dcat_publisher_name NASA ArcGIS Online
guid https://www.arcgis.com/home/item.html?id=daf6ba9c097a4aeda7e799dc5cc1b634
Tags
  • ASF
  • Florida
  • Hurricane
  • Hurricane Ian
  • Ian
  • NASA
  • NASA Disasters Program
  • RGB Decomposition
  • RTC
  • Radiometric Terrain Correction
  • SAR
  • Sentinel-1
  • Synthetic Aperture Radar
isopen False
metadata_created 2025-09-18T18:21:30.967248
metadata_modified 2025-09-18T18:21:30.967254
notes <div><p style='margin-top:0px; margin-bottom:0.75rem; max-width:100%; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;'><span style='max-width:100%; display:inherit;'><b>Dates of Images:</b><br /></span></p></div><div>9/20/2022 - 10/31/2022<br /></div><div><br /></div><div><b>Date of Next Image:</b></div><div>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.<br /></div><div><br /></div><div><b>Summary:</b></div><div>The Alaska Satellite Facility has developed false color Red, Green, Blue (RGB) and Radiometrically Terrain-Correct (RTC) composites 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.<br /></div><div><br /></div><div>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).</div><div><br /></div><div>To identify the date of an image either set the time slider to a 1 day interval or zoom in to AOI, set time slider to desired range and click on the imagery. The name will contain a full date and time in a format like this example:<br />S1A_IW_<span style='font-weight:bold;'>20210705T231453</span>_DVR_RTC30_G_gpufed_27F4</div><div>The date and time would be 07/05/2021 at 23:14:53 UTC.<br /></div><div><br /></div><div><a href='https://earthdata.nasa.gov/learn/articles/getting-started-with-sar' target='_blank' rel='nofollow ugc noopener noreferrer'>Additional SAR Information</a></div><div><br /></div><div><b>Suggested Use:</b></div><div>In this image, 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. </div><div><br /></div><div><b>Satellite/Sensor: </b></div><div>Synthetic Aperture Radar on European Space Agency's (ESA) Copernicus Sentinel-1A/B satellite</div><div><i>NOTE</i>: Sentinel-1B is no longer acquiring data and is only available into December 2021</div><div><br /></div><div><span style='font-weight:bold;'>Resolution:</span></div><div>30 meters<br /></div><div><br /></div><div><b>Credits: </b></div><div>Sentinel data used in this derived product, contains modified Copernicus Sentinel data (2019-2022), processed by ESA, Alaska Satellite Facility.<br /></div><div><br /></div><div><b>Esri REST Endpoint:</b></div><div>RGB Product:<br /></div><div><a href='https://asf.img.arcgis.com/arcgis/rest/services/ASF_RTC/ASF_S1_RGB/ImageServer' target='_blank' rel='nofollow ugc noopener noreferrer'>https://asf.img.arcgis.com/arcgis/rest/services/ASF_RTC/ASF_S1_RGB/ImageServer</a></div><div><br /></div><div>RTC Product:</div><p style='margin-top:0px; margin-bottom:0.75rem; max-width:100%; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;'><span style='max-width:100%; display:inherit;'></span></p><div><a href='https://asf.img.arcgis.com/arcgis/rest/services/ASF_RTC/ASF_S1_RTC/ImageServer' target='_blank' rel='nofollow ugc noopener noreferrer'>https://asf.img.arcgis.com/arcgis/rest/services/ASF_RTC/ASF_S1_RTC/ImageServer</a></div><div><br /></div><div><b>Data Download: </b></div><div>Data can be downloaded via the Pop-Ups in the Web Map or through each service's attribute table.</div>
num_resources 1
num_tags 13
title SAR Data for the United States Coastlines (Copernicus Sentinel-1, Alaska Satellite Facility) for Hurricane Ian
url https://disasters.amerigeoss.org/maps/NASA::sar-data-for-the-united-states-coastlines-copernicus-sentinel-1-alaska-satellite-facility-for-hurricane-ian