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Service Description: Date of Images:
8/10/2024, 8/22/2024
Date of Next Image:
None Expected
Summary:
The Alaska Satellite Facility has developed false color Red, Green, Blue (RGB) and Radiometrically Terrain-Correct (RTC) composites of the Sentinel-1A 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.
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).
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.
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). It is normal for the RGB to have holes in it in areas that were masked out due to shadow or certain terrain.
Satellite/Sensor:
Synthetic Aperture Radar on European Space Agency's (ESA) Copernicus Sentinel-1A satellite
Resolution:
30 meters
Credits:
Sentinel data used in this derived product, contains modified Copernicus Sentinel data (2023), processed by ESA, Alaska Satellite Facility, NASA MSFC
Esri REST Endpoint:
See URL section on right side of page
WMS Endpoint:
Data Download:
Sentinel 1A
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Description: Date of Images:8/10/2024, 8/22/2024Date of Next Image:None ExpectedSummary:The Alaska Satellite Facility has developed false color Red, Green, Blue (RGB) and Radiometrically Terrain-Correct (RTC) composites of the Sentinel-1A 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.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).Additional SAR InformationSuggested 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.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). It is normal for the RGB to have holes in it in areas that were masked out due to shadow or certain terrain.Satellite/Sensor:Synthetic Aperture Radar on European Space Agency's (ESA) Copernicus Sentinel-1A satelliteResolution:30 metersCredits:Sentinel data used in this derived product, contains modified Copernicus Sentinel data (2023), processed by ESA, Alaska Satellite Facility, NASA MSFCEsri REST Endpoint:See URL section on right side of pageWMS Endpoint:Data Download:
Service Item Id: 151a64c9359c47cd9448eb7f9bc10b9e
Copyright Text: NASA MSFC, Alaska Satellite Facility, ESA, Copernicus
Spatial Reference:
32645
(32645)
Single Fused Map Cache: false
Initial Extent:
XMin: 249169.26039119798
YMin: 2984245
XMax: 681470.739608802
YMax: 3221735
Spatial Reference: 32645
(32645)
Full Extent:
XMin: 318720
YMin: 2995040
XMax: 611980
YMax: 3210940
Spatial Reference: 32645
(32645)
Units: esriMeters
Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP
Document Info:
Title: RGB Composite, VH Backskatter, and VV Backskatter (Copernicus Sentinel-1) for the Nepal Flood, August 2024
Author:
Comments: Date of Images:8/10/2024, 8/22/2024Date of Next Image:None ExpectedSummary:The Alaska Satellite Facility has developed false color Red, Green, Blue (RGB) and Radiometrically Terrain-Correct (RTC) composites of the Sentinel-1A 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.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).Additional SAR InformationSuggested 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.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). It is normal for the RGB to have holes in it in areas that were masked out due to shadow or certain terrain.Satellite/Sensor:Synthetic Aperture Radar on European Space Agency's (ESA) Copernicus Sentinel-1A satelliteResolution:30 metersCredits:Sentinel data used in this derived product, contains modified Copernicus Sentinel data (2023), processed by ESA, Alaska Satellite Facility, NASA MSFCEsri REST Endpoint:See URL section on right side of pageWMS Endpoint:Data Download:
Subject: RGB Composite, VH Backskatter, and VV Backskatter (Copernicus Sentinel-1) for the Nepal Flood, August 2024
Category:
Keywords: NASA,NASA Disasters Program,NASA MSFC,ASF,Alaska Satellite Facility,Copernicus,Sentinel-1,ESA,SAR,Nepal,Flood,glacial lake outburst
AntialiasingMode: Fast
TextAntialiasingMode: Force
Supports Dynamic Layers: true
MaxRecordCount: 2000
MaxImageHeight: 4096
MaxImageWidth: 4096
Supported Query Formats: JSON, geoJSON, PBF
Supports Query Data Elements: true
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