Welcome to the National Center for Atmospheric Research, High Altitude Observatory
web site supporting the NASA TIMED mission.
The Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics
satellite is a
mission to study the mesosphere and lower thermosphere from about 60 to 180 km altitude,
and understand how solar
variability and lower atmosphere processes combine to make this one of the most dynamic
and variable regions of the terrestrial atmosphere.
carries four instruments,
a Global Ultraviolet Imager
an infrared limb-sounder
a solar ultraviolet spectrometer
and a Fabry-Perot interferometer
Data are available through
the TIMED Mission Data Center
and the individual instrument web sites.