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Satellite imagery are images of Earth collected by imaging satellites operated by governments and businesses around the world. Learn about the history, types, and uses of satellite imagery in various fields such as weather, oceanography, agriculture, and biodiversity.
VIIRS is a radiometer that collects imagery and data of the land, atmosphere, cryosphere, and oceans in the visible and infrared bands. It is on board three weather satellites and provides global coverage every 14 hours for climate change research and monitoring.
Learn about the 11 regions of the U.S. that contain two or more adjacent urban metropolitan areas with blurred boundaries and common systems. Find out the definition, history, and characteristics of each megaregion, such as population, economy, and ecology.
Learn how the US tracks and catalogs artificial objects in space, including satellites and debris. Find out how the Sputnik launch triggered the development of the Space Tracking System and the Space Surveillance Network.
The NRO is a U.S. intelligence agency that designs, builds, launches, and operates reconnaissance satellites for national security. It provides satellite intelligence to several government agencies, such as SIGINT, IMINT, and MASINT, and has a history of classified programs since 1960.
A comprehensive list of Earth-orbiting spacecraft with sensors used to collect imagery and measurements of the surface of the Earth. The list covers both public domain and private domain satellites, with name, status, agency, launch date, and description.
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