May 2, 2024 9:21
type: Dataset
description: Dates of Images: 5/2/2024, 5/4/2024 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 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. 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 may 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. 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 Esri REST Endpoint: See direct subsetted information on the link the to the right with WMS options. RGB …
issued: 2024-05-09T15:34:07+00:00
modified: 2024-05-10T13:14:43+00:00
publisher: NASA ArcGIS Online
keyword: 2024
keyword: Copernicus
keyword: Flood
keyword: Flooding
keyword: Floods
keyword: Landslides
keyword: NASA
keyword: NASA Disasters Program
keyword: Sentinel-1
landing page: https://disasters.amerigeoss.org/maps/NASA::may-2-2024-921

CSV
type: Distribution
format: CSV
issued: 2025-09-18T18:10:31.463559
modified: 2025-09-18T18:10:31.451790
access URL: https://disasters.amerigeoss.org/api/download/v1/items/9fac15af35cf4753a4a6a1004814ff36/csv

GeoJSON
type: Distribution
format: GeoJSON
issued: 2025-09-18T18:10:31.463561
modified: 2025-09-18T18:10:31.451968
access URL: https://disasters.amerigeoss.org/api/download/v1/items/9fac15af35cf4753a4a6a1004814ff36/geojson

ArcGIS GeoService
type: Distribution
format: ArcGIS GeoServices REST API
issued: 2025-09-18T18:10:31.463556
modified: 2025-09-18T18:10:31.451622
access URL: https://maps.disasters.nasa.gov/ags03/rest/services/brasil_flood_202405/sentinel1/MapServer/27

Shapefile
type: Distribution
format: ZIP
issued: 2025-09-18T18:10:31.463560
modified: 2025-09-18T18:10:31.451880
access URL: https://disasters.amerigeoss.org/api/download/v1/items/9fac15af35cf4753a4a6a1004814ff36/shapefile

ArcGIS Hub Dataset
type: Distribution
format: HTML
issued: 2025-09-18T18:10:31.463553
modified: 2025-09-18T18:10:31.451493
access URL: https://disasters.amerigeoss.org/maps/NASA::may-2-2024-921

KML
type: Distribution
format: KML
issued: 2025-09-18T18:10:31.463562
modified: 2025-09-18T18:10:31.452046
access URL: https://disasters.amerigeoss.org/api/download/v1/items/9fac15af35cf4753a4a6a1004814ff36/kml

OGC WMS
type: Distribution
format: OGC WMS
issued: 2025-09-18T18:10:31.463558
modified: 2025-09-18T18:10:31.451708
access URL: https://maps.disasters.nasa.gov/ags03/services/brasil_flood_202405/sentinel1/MapServer/WMSServer