Showing posts with label LANDSAT 8 SATELLITE. Show all posts
Showing posts with label LANDSAT 8 SATELLITE. Show all posts

Friday, September 26, 2014

AFTERMATH OF KING FIRE IN ELDORADO NATIONAL FOREST

FROM:  NASA  

On Sept. 19, 2014, the Operational Land Imager (OLI) on the Landsat 8 satellite captured these images of the King fire in Eldorado National Forest. In the false-color image, burned forest appears red; unaffected forests are green; cleared forest is beige; and smoke is blue. As of Sept. 23, the blaze had charred 36,320 hectares (89,571 acres).  Image Credit: NASA Earth Observatory image by Jesse Allen, using Landsat data from the U.S. Geological Survey Caption: Adam Voiland

Thursday, February 13, 2014

LANDSAT 8 CELEBRATES ONE YEAR IN SPACE

FROM:  NASA 

On Feb. 11, 2013, the Landsat 8 satellite rocketed into a sunny California morning aboard a powerful Atlas V and began its life in orbit. In the year since launch, scientists have been working to understand the information the satellite has been sending back. Some have been calibrating the data—checking it against ground observations and matching it to the rest of the 42-year-long Landsat record. At the same time, the broader science community has been learning to use the new data.

The map above—one of the first complete views of the United States from Landsat 8—is an example of how scientists are testing Landsat 8 data. David Roy, a co-leader of the USGS-NASA Landsat science team and researcher at South Dakota State University, made the map with observations taken during August 2013 by the satellite’s Operational Land Imager. The strips in the image above are a result of the way Landsat 8 operates. Like its predecessors, Landsat 8 collects data in 185-kilometer (115-mile) wide strips called swaths or paths. Each orbit follows a predetermined ground track so that the same path is imaged each time an orbit is repeated. It takes 233 paths and 16 days to cover all of the land on Earth. This means that every land surface has the potential to be imaged once every 16 days, giving Roy two or three opportunities to get a cloud-free view of each pixel in the United States in a month. Image Credit-NASA-David Roy.

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