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In-Flight Calibration of the Wind Imaging Interferometer (WINDII) on Board the Upper Atmosphere Research Satellite
Applied Optics
|February 13, 2008
Summary
The Wind Imaging Interferometer (WINDII) accurately measured upper-atmospheric winds using in-flight calibration data. This validated the instrument
Area of Science:
- Atmospheric Science
- Space Physics
- Optical Instrumentation
Background:
- The Upper Atmosphere Research Satellite carried the Wind Imaging Interferometer (WINDII) for remote sensing.
- WINDII measures upper-atmospheric wind and temperature using airglow emission lines.
Purpose of the Study:
- To assess the WINDII instrument's wind measurement capabilities.
- To validate the use of in-flight calibration data for WINDII.
Main Methods:
- Employed a field-compensated Michelson interferometer to detect Doppler shifts in airglow.
- Utilized a pre-launch calibration package with He-Ne laser, spectral lamps, and tungsten lamp.
- Monitored instrument performance over six years of orbital operation.
Main Results:
- Demonstrated that in-flight calibration data fully assesses WINDII's wind measurement principle.
- Established a precise relationship between preflight and in-flight phase calibrations (order of 1 ms(-1)).
Conclusions:
- In-flight calibration is crucial for validating WINDII's atmospheric wind measurements.
- The instrument maintained performance and calibration accuracy over its mission duration.
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