TIMED Doppler Interferometer (TIDI)

Timothy L. Killeen, Wilbert R. Skinner, Roberta M. Johnson, Charles J. Edmonson, Qian Wu, Rick J. Niciejewski, Heinz J. Grassl, David A. Gell, Peter E. Hansen, Jon D. Harvey, Julie F. Kafkalidis

Research output: Contribution to journalConference articlepeer-review


The TIMED Doppler Interferometer (TIDI) is a Fabry-Perot interferometer designed to measure winds, temperatures, and constituents in the mesosphere and thermosphere (60-300 km) region of the atmosphere as part of the TIMED mission. TIDI is a limb viewer and observes emissions from OI 557.7 nm, OI 630.0 nm, OII 732.0 nm, O2(0-0), O2(0-1), Na D, OI 844.6 nm, and OH in the spectral region 550-900 nm. Wind measurement accuracies will approach 3 ms-1 in the mesosphere and 15 ms-1 in the thermosphere. The TIDI instrument has several novel features that allow high measurement accuracies in a modest-sized instrument. These include: an optical system that simultaneously feeds the views from four scanning telescopes which are pointed at ±45° and ±135° to the spacecraft velocity vector into a high-resolution interferometer, the first spaceflight application of the circle-to-line imaging optic (CLIO), and a high quantum efficiency, low noise CCD.

Original languageEnglish (US)
Pages (from-to)289-301
Number of pages13
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research III - Denver, CO, USA
Duration: Jul 19 1999Jul 21 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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