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Date of Image:
1/15/2022
Date of Next Image:
None Expected
Summary:
The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory and California Institute of Technology, and University of California Los Angeles in Southern California created this preliminary amplitude-based Damage Proxy Map (DPMa) depicting areas that are likely damaged in the Vava'u and Ha'apai islands of Tonga due to the eruption and tsunami of Hunga Tonga-Hunga Ha'apai volcano on 15 Jan. 2022. This map was derived from synthetic aperture radar (SAR) images acquired by the Copernicus Sentinel-1 satellites operated by the European Space Agency (ESA) from 10 December 2021 to 15 January 2022.
Suggested Use:
The color variation from pale yellow to red indicates increasingly more significant surface change (drop in radar reflections). Blue tones are increased radar reflections.
This damage proxy map from the radar amplitudes (VH polarization) should be used as guidance to identify damaged or flooded areas, and is most reliable over vegetated areas where trees or buildings were replaced by water or smooth sand. For example, the scattered colored pixels over vegetated areas may be radar noise, and the lack of colored pixels does not necessarily mean no damage. This map is most sensitive to vegetation changes, but small-scale change or partial structural damage may not be detected by this map. Areas of low radar reflection were masked out so this map does not provide information on the Hunga Tonga-Hunga Ha'apai islands.
Satellite/Sensor:
Copernicus Sentinel-1 Synthetic Aperture Radar (SAR)
Resolution:
30 meters
Credits:
Sentinel-1 data were accessed through the Google Earth Engine. The product contains modified Copernicus Sentinel data (2021-2022), processed by ESA and Google Earth Engine, and analyzed by the NASA-JPL/Caltech ARIA team. Part of the funding was provided by NASA's Earth Applied Sciences Disasters Program.
For more information about ARIA, visit: http://aria.jpl.nasa.gov
Esri REST Endpoint:
See URL section on right side of page
WMS Endpoint
Data Download:
https://aria-share.jpl.nasa.gov/202201_Tonga_HungaTonga_Volcano/DPM/
Date of Image:
1/15/2022
Date of Next Image:
None Expected
Summary:
The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory and California Institute of Technology, and University of California Los Angeles in Southern California created this preliminary amplitude-based Damage Proxy Map (DPMa) depicting areas that are likely damaged in the Vava'u and Ha'apai islands of Tonga due to the eruption and tsunami of Hunga Tonga-Hunga Ha'apai volcano on 15 Jan. 2022. This map was derived from synthetic aperture radar (SAR) images acquired by the Copernicus Sentinel-1 satellites operated by the European Space Agency (ESA) from 10 December 2021 to 15 January 2022.
Suggested Use:
The color variation from pale yellow to red indicates increasingly more significant surface change (drop in radar reflections). Blue tones are increased radar reflections.
This damage proxy map from the radar amplitudes (VH polarization) should be used as guidance to identify damaged or flooded areas, and is most reliable over vegetated areas where trees or buildings were replaced by water or smooth sand. For example, the scattered colored pixels over vegetated areas may be radar noise, and the lack of colored pixels does not necessarily mean no damage. This map is most sensitive to vegetation changes, but small-scale change or partial structural damage may not be detected by this map. Areas of low radar reflection were masked out so this map does not provide information on the Hunga Tonga-Hunga Ha'apai islands.
Satellite/Sensor:
Copernicus Sentinel-1 Synthetic Aperture Radar (SAR)
Resolution:
30 meters
Credits:
Sentinel-1 data were accessed through the Google Earth Engine. The product contains modified Copernicus Sentinel data (2021-2022), processed by ESA and Google Earth Engine, and analyzed by the NASA-JPL/Caltech ARIA team. Part of the funding was provided by NASA's Earth Applied Sciences Disasters Program.
For more information about ARIA, visit: http://aria.jpl.nasa.gov
Esri REST Endpoint:
See URL section on right side of page
WMS Endpoint
Data Download:
https://aria-share.jpl.nasa.gov/202201_Tonga_HungaTonga_Volcano/DPM/