NASA produced a map of areas in Puerto Rico likely damaged by Hurricane Maria to help those responding to the disaster. The Category 4 hurricane caused widespread damage and numerous casualties on the island, an unincorporated U.S. territory with a Population of about 3.4 million.
To assist in disaster response efforts, scientists at NASA Jet Propulsion Laboratory and California Institute of technology – Caltech, both in Pasadena, California, obtained and used before-and-after interferometric synthetic aperture radar (InSAR) satellite imagery to identify areas that are likely damaged. The imagery – acquired before the storm on March 25 and again one day after landfall on Sept. 21 – is from the radar instruments on the Copernicus Sentinel-1 satellites operated by the ESA – European Space Agency.
The views indicate the extent of likely damage, based on changes to the ground surface detected by radar. The color variations from yellow to red indicate increasingly more significant ground and building surface change. The map covers the area within the large red polygon in the figure, which is 105 by 60 miles (169 by 96 kilometers) in extent. The inset, denoted by the orange rectangle, highlights damage in and around the capital city of San Juan. Each pixel in the map measures about 98 feet (30 meters) across. https://go.nasa.gov/2k5zJ6F
NASA produced a map of areas in Puerto Rico likely damaged by Hurricane Maria to help those responding to the disaster. The Category 4 hurricane caused widespread damage and numerous casualties on the island, an unincorporated U.S. territory with a population of about 3.4 million.
To assist in disaster response efforts, scientists at NASA Jet Propulsion Laboratory and California Institute of Technology – Caltech, both in Pasadena, California, obtained and used before-and-after interferometric synthetic aperture radar (InSAR) satellite imagery to identify areas that are likely damaged. The imagery – acquired before the storm on March 25 and again one day after landfall on Sept. 21 – is from the radar instruments on the Copernicus Sentinel-1 satellites operated by the ESA – European Space Agency.
The views indicate the extent of likely damage, based on changes to the ground surface detected by radar. The color variations from yellow to red indicate increasingly more significant ground and building surface change. The map covers the area within the large red polygon in the figure, which is 105 by 60 miles (169 by 96 kilometers) in extent. The inset, denoted by the orange rectangle, highlights damage in and around the capital city of San Juan. Each pixel in the map measures about 98 feet (30 meters) across. https://go.nasa.gov/2k5zJ6F
