Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
SPECIAL ANNOUNCEMENT
2016 Photonics Buyers' Guide Clearance! – Use Coupon Code FC16 to save 60%!
share
Email Facebook Twitter Google+ LinkedIn Comments

Mission to Earth

Photonics Spectra
Apr 2009
Anne L. Fischer, Senior Editor, anne.fischer@laurin.com

The environment is often studied from here on Earth. But why not a top-down rather than a bottom-up approach? NASA’s Earth Observing System (EOS) grew out of an idea proposed by astronaut Sally Ride, who, after observing Earth from outer space, envisioned “Mission to Planet Earth,” a coordinated global research effort to preserve the planet.

GRair_Fig1.jpg
The A-Train is a group of satellites orbiting some 400 miles above the Earth’s surface. Courtesy of NASA.

The EOS program subsequently launched a series of satellites to provide researchers and scientists around the globe with data that forms a snapshot of our planet. Dubbed the “A-Train” because they fly in formation as a flotilla, the satellites travel at low polar orbits about 438 miles above the Earth’s surface – timed to pass over the same point within a few minutes of each other. Onboard are sophisticated state-of-the-art photonic equipment, including lasers, spectrometers, radar, telescopes and optoelectronic imagers.


Comments
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!