File:The A-Train.jpg
The_A-Train.jpg (670 × 453 pixels, file size: 244 KB, MIME type: image/jpeg)
OCO-2 "game changing" earth science
The A-Train convoy of orbiting earth observing satellites ...
http://www.greenpolicy360.net/w/OCO-2
https://www.nasa.gov/mission_pages/a-train/a-train.html
NASA and its international partners operate several Earth-observing satellites that closely follow one after another along the same orbital “track.” This coordinated group of satellites, constituting a significant subset of NASA’s current operating major satellite missions, is called the Afternoon Constellation, or the A-Train, for short. The satellites are in a polar orbit, crossing the equator northbound at about 1:30 p.m. local time, within seconds to minutes of each other. This allows near-simultaneous observations of a wide variety of parameters to aid the scientific community in advancing our knowledge of Earth-system science and applying this knowledge for the benefit of society. Five satellites currently fly in the A-Train: GCOM-W1, Aqua, CALIPSO, CloudSat, and Aura. On November 16, 2011, PARASOL was lowered to 9.5 km under the A-Train and on December 18, 2013 PARASOL ceased operation, fully exiting the A-Train.
OCO-2 joined the configuration in July 2014.
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