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	+ NASA Home + JPL Home At least 10 JPL satellites and instruments orbit Earth, returning spectacular images while monitoring the Sun's energy, atmospheric activity and various aspects of the ocean, including surface winds, temperature and sea level. + More NASA Facts...		+ NASA Home > Centers > JPL > Earth Quick Scatterometer Launch: June 19, 1999 This ocean-observing satellite carries an instrument called a scatterometer, which sends radar pulses to the ocean surface and measures the "backscattered" or echoed radar pulses bounced back to the satellite. + Read More Advanced Spaceborne Thermal Emission and Reflection Radiometer Launch: December 18, 1999 This imaging instrument aboard NASA's Terra satellite is designed to obtain high-resolution global, regional and local views of Earth in 14 color bands. + Read More Multi-angle Imaging SpectroRadiometer Launch: December 18, 1999 Carried onboard NASA's Terra satellite, this imaging system collects images from nine widely spaced angles as it glides above Earth. + Read More Active Cavity Irradiance Monitor Satellite Launch: December 22, 1999 This satellite is designed to monitor the total amount of the Sun's energy reaching Earth. + Read More Jason 1 Launch: December 7, 2001 This oceanography mission is a follow-up to Topex/Poseidon and will monitor global ocean circulation and monitor events such as El Niño. + Read More Gravity Recovery and Climate Experiment Launch: Mar. 17, 2002 This joint U.S.-German mission consists of two spacecraft flying in tandem to measure Earth's gravitational field very precisely. + Read More Atmospheric Infrared Sounder Launch: May 4, 2002 This instrument onboard NASA's Aqua satellite makes highly accurate measurements of air temperature, humidity, clouds and surface temperatures. + Read More Microwave Limb Sounder Launch: July 15, 2004 This instrument, which flies aboard NASA's Aura spacecraft, is designed to improve our understanding of ozone. + Read More Tropospheric Emission Spectrometer Launch: July 15, 2004 This instrument onboard NASA's Aura spacecraft is an infrared sensor designed to study Earth's troposphere and look at ozone. + Read More Hurricane Watch From Space Learn how scientists study and monitor hurricanes from space. + View this Video Earth Wallpaper + View site El Nino / La Nina Watch + View site Where on Earth? + View site
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