A-train (satellite constellation)

As of 2014, the A-Train consists of six satellites and one no longer in the constellation.

The A-train (from Afternoon Train) is a satellite constellation of six Earth observation satellites of varied nationality in sun-synchronous orbit at an altitude of 705 km (438 mi) above the Earth.[1]

The orbit, at an inclination of 98.14°, crosses the equator each day at around 1:30 pm solar time, giving the constellation its name; the "A" stands for "afternoon;"[2] and crosses the equator again on the night side of the Earth, at around 1:30 am.

They are spaced a few minutes apart from each other so their collective observations may be used to build high-definition three-dimensional images of the Earth's atmosphere and surface.

Satellites

Active

The train, as of July 2014,[3] consists of six active satellites:

Past

Failed

References

  1. «A-train Symposium October 2007: Constellation keeps its promises», CNESMAG, January 2008
  2. NASA, Introducing the A-Train, 10.26.10 (accessed April 30 2012)
  3. "Individual A-Train Missions". June 5, 2012. Retrieved 2013-11-15.
  4. CNES News on Calipso
  5. OCO homepage
  6. Media Briefing Scheduled To Discuss Orbiting Carbon Observatory Mission
  7. Glory homepage

External links

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