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OCO-3 Ready to Extend NASA’s Study of Carbon

OCO-3 sits on the large vibration table (known as the “shaker”) in the Environmental Test Lab at the Jet Propulsion Laboratory. (Credits: NASA/JPL-Caltech)

Updated at 12:35 a.m. PDT (3:35 a.m. EDT) on May 10

NASA’s OCO-3 was removed from the Dragon spacecraft and robotically installed on the exterior of the space station’s Japanese Experiment Module-Exposed Facility as of approximately 9 p.m. PDT on May 9 (12 a.m. EDT on May 10). Over the next two days, a functional checkout will be performed and the OCO-3’s Pointing Mirror Assembly (PMA) will be deployed. The PMA and context cameras will then perform an initial survey of OCO-3’s surroundings to make sure nothing unexpected is interfering with its view of Earth.

Updated at 9:10 a.m./p.m. PDT (12:10 p.m. EDT) on May 4

SpaceX CRS-17 launched Friday, May 3, 11:48 p.m. PDT (Saturday, May 4, 2:48 a.m. EDT).

PASADENA, Calif. (NASA/JPL-Caltech PR) — When the Orbiting Carbon Observatory 3, OCO-3, heads to the International Space Station, it will bring a new view — literally — to studies of Earth’s carbon cycle.

From its perch on the space station, OCO-3 will observe near-global measurements of carbon dioxide on land and sea, from just after sunrise to just before sunset. That makes it far more versatile and powerful than its predecessor, OCO-2.


  • Parabolic Arc
  • May 15, 2019