The Fabry-Perot Interferometer (FPI) on Dynamics Explorer is a remote sensing instrument designed to measure the temperature, meriodional wind and density of the metastable atoms O(**1S) and O(**1D) and the ion O** plus (**2P) in the thermosphere. The measurements are made with a stable, high resolution Fabry-Perot etalon, which performs a wavelength analysis on the light detected from the thermospheric emission features by spatially scanning the interference fringe plane with a multichannel array detector. The wavelength analysis characterizes the Doppler line profile of the emitting specie. A sequential altitude scan performed by a commandable horizon scan mirror provides a cross-sectional view of the thermodynamic and dynamic state of the thermosphere below the orbit of the Dynamics Explorer 'B' satellite.
|Original language||English (US)|
|Number of pages||22|
|Journal||Space science instrumentation|
|State||Published - 1981|
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