Overview
The TIMED Doppler Interferometer (TIDI) is investigating
the dynamics and energetics of the Earth's mesosphere and
lower-thermosphere.
TIDI measurements allow us to obtain a global description of the
vector wind fields, as well as important information
on gravity waves, species densities, airglow and auroral emission
rates and noctilucent clouds. TIDI provides basic
information about global winds. TIDI also
contributes to the study of energetics.
Science Objectives
The TIDI interferometer (or Profiler) primarily measures
horizontal vector winds from the Earth's limb,
with a vertical resolution 2.5 km and with an
accuracy that approaches ~3 m/sec under
optimum viewing conditions. The TIDI design allows for 100% duty
cycle instrument operation during daytime, nighttime, and in auroral
conditions. TIDI views emissions from OI 557.7 nm and O2(0-0) to determine Doppler wind.
Description
TIDI comprises three major subsystems: four identical
telescopes, a Fabry-Perot interferometer with a CCD detector, and an
electronics box. Light from the selected regions of the atmosphere is
collected by the telescopes and fiber-optically coupled to the
detection optics. The four fields of view are scrambled along with a
calibration field input and converted to an array of five concentric
circular wedges. This input then passes through a selected filter,
then through a Fabry-Perot etalon, and is finally imaged onto a CCD
via a circle to line imaging optic (CLIO) device.
Click here for the TIDI Fact Sheet.
Related sites:
Location: http://tidi.engin.umich.edu/
Page Source: Original Web Document
Creation Date: September 2, 1999
Last Modified: March 4, 2010 - mlc
Contact Person: 