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What is CLARREO?
The Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission, led and developed by NASA and partner organizations, will monitor the pulse of the Earth to better understand climate change.

CLARREO is a climate-focused mission that will become a key element of the climate observing system.

The foundation for CLARREO is the ability to produce highly accurate and trusted climate records. Measurements derived from CLARREO will be used to detect climate trends and to test, validate, and improve climate prediction models.

The CLARREO mission will provide accurate, credible, and tested climate records that lay the groundwork for informed decisions on mitigation and adaptation policies that address the effects of climate change on society.
CLARREO Spotlight
Recent News & Articles
CLARREO Science Team Summary Report
October, 2015
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Guidelines for
Radiometric Calibration
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Berkeley, CA
April 28 - 30, 2015
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VOI for Climate
Observing Systems
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Trans-Atlantic Cooperation Explored for TRUTHS & CLARREO Missions
the article is on page 16
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 2014 CLARREO Brief
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Executive Summary
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