Two decades – an insignificant term by the standards of the life of the planet, but how many hurricanes, floods and fires occurred during this time? How many realized man-made projects, the result of which is visible from space? The answer can be given by a new version of the Worldview tool from NASA, which reflects changes on the surface of the Earth since 1999.
The map was created on the basis of observations of the Terra satellite, which in 2002 was joined by a colleague Aqua. Advanced users could see daily data from Terra since 2012, but now the testimony for 20 years is collected – the largest, global diary of observations of the Earth's surface in the history of mankind. An interesting toy for the townsfolk and an extremely useful research tool for scientists.
Santiago Gasso, NASD Researcher, gives this comparison. If you wanted to look in the last century, for example, on the clouds off the coast of California, you had to first raise the weather directory to find out the best time for observations. Then leave an application so that during the flight of the satellite in this area you are allocated a “window” for shooting. Then you would get a physical carrier on your hands, the data from which you need to decrypt and print.
Now you can see the same clouds in a few mouse clicks. And immediately compare them with other images, compare with the data on air and water temperature, pressure and wind speed. To see weather and scale anthropogenic phenomena, superimpose different layers and review the whole situation. A priceless treasury of knowledge about the recent past of our planet is available here.js.src = “&version=v2.8”; 'script', 'facebook-jssdk'));