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• This is the webpage for the closed out 2007 Decadal Survey-recommended CLARREO mission.
Please proceed to the CLARREO Pathfinder mission webpage to learn more about the CLARREO Pathfinder mission,
  which is scheduled to be hosted on the International Space Station in the 2023 time frame.

What is CLARREO?
The Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission will monitor the pulse of the Earth to better understand climate change. The foundation for CLARREO is the ability to produce highly accurate and trusted climate records. These tested climate records can be used to lay the groundwork for informed decisions on mitigation and adaptation policies that address the effects of climate change on society.
What is CLARREO Pathfinder?
In 2016, CLARREO received authorization to conduct a Pathfinder mission called CLARREO Pathfinder (CPF). Its goal is to reduce risk, demonstrate essential techniques and technologies, and advance the science for a full CLARREO mission.

The CPF instrument is a reflected solar spectrometer that measures energy from the sun reflected back from Earth. Benefits of CPF include demonstrating improved measurement accuracy by factors of 5-10 and demonstrating the ability to inter-calibrate with other Earth-observing sensors.

CPF is scheduled to launch to the ISS in the 2023 timeframe.
CLARREO Spotlight
Recent News
Laboratory for Atmospheric and Space Physics (LASP)
Boulder, CO
May 16-17, 2018
+ View the Agenda

CLARREO Pathfinder
Inter-calibration Workshop
National Institute of Aerospace
November 16, 2017
+ View the PDF Agenda

National Institute of Aerospace
Hampton, VA
November 14-15, 2017
+ View the Agenda
Fact Sheets
CLARREO Pathfinder Factsheet
+ View the PDF Document

Economic Value of an Improved Climate Observing System
+ View the PDF Document

CLARREO Pre-formulation Factsheet
+ View the PDF Document