Stratospheric Aerosol and Gas Experiment III

Project Description
The Stratospheric Aerosol and Gas Experiment III (SAGE III) role in
the NASA's Earth Observation (EOS) program is to provide global,
long-term measurements of key components of the Earth's
atmosphere. The most important of these are the vertical distribution
of aerosols and ozone from the upper troposphere through the

In addition, SAGE III also provides unique measurements of temperature
in the stratosphere and mesosphere and profiles of trace gases such as
water vapor and nitrogen dioxide that play significant roles in
atmospheric radiative and chemical processes.

The SAGE III Science Team functions in a dual role where they ensure
the data quality and interpret the SAGE III data in the broader
context of global change.

The SAGE III instrument is a grating spectrometer that measures
ultraviolet/visible energy. It relies upon the flight-proven designs
used in the Stratospheric Aerosol Measurement (SAM I) and SAGE I and
II instruments.

The SAGE III instrument was developed and managed by NASA Langley
Research Center and was built by Ball Aerospace in Boulder, CO. Three
copies were produced. One instrument is mounted on the Meteor-3M
spacecraft and a second will be place in orbit on the International
Space Station in 2005. SAGE III on the Meteor-3M is a joint mission
between NASA and the Russian Space Agency (RSA). The SAGE III on the
Russian Meteor-3M was launched December 10, 2001 from the Baikonur

For more information on SAGE III, see:

For more information on NASA's Earth Science Enterprise, see:

For more information on the Earth Observing System (EOS), see: