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Michelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI) On-Orbit Wind Observations: Data

Christoph R Englert1, John M Harlander2, Kenneth D Marr1

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Space Science Reviews
|April 11, 2023
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Summary
This summary is machine-generated.

The Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument on the ICON satellite successfully meets its mission requirements for thermospheric wind data. On-orbit performance updates include new calibration and data processing methods, ensuring high-quality wind measurements.

Keywords:
ICON Explorer missionLimb soundingSpatial Heterodyne SpectroscopyThermospheric wind

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Area of Science:

  • Space Physics
  • Atmospheric Science
  • Remote Sensing

Background:

  • The Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument was launched on NASA's Ionospheric Connection (ICON) satellite.
  • Previous documentation detailed MIGHTI's design and pre-launch operational principles.

Purpose of the Study:

  • To update and expand on the MIGHTI wind data analysis.
  • To discuss the on-orbit instrument performance and data processing.
  • To validate MIGHTI's thermospheric wind measurements against mission requirements and ground-based observations.

Main Methods:

  • Detailed description of key data processing steps, including correction for signal-intensity dependent phase shifts.
  • Introduction of a new, high-precision zero-wind calibration approach.
  • Comparison of MIGHTI wind data with ground-based Fabry-Perot interferometer and meteor radar observations.

Main Results:

  • MIGHTI's on-orbit performance meets ICON mission requirements for wind uncertainties.
  • A new zero-wind calibration method offers improved precision.
  • MIGHTI wind data shows good agreement with ground-based observations.
  • A relative airglow brightness profile product is now available.

Conclusions:

  • The MIGHTI instrument provides reliable thermospheric wind data meeting mission specifications.
  • Updated data analysis and calibration techniques enhance data quality.
  • MIGHTI data, processed as Version 5, is validated through comparisons with independent measurements.