Abstract: The application of Fabry-Perot interferometers (FPI) to the study of upper atmosphere thermodynamics has largely been restricted by the very low light levels in the terrestrial airglow as well as the limited range in wavelength of photomultiplier tube technology. During the past decade, the development of the scientific grade charge coupled device (CCD) has progressed to the stage where this detector has become the logical replacement for the PMT. Small, fast microcomputers have made it possible to `upgrade' our remote field sites with bare CCDs and not only retain the previous capabilities of the exiting FPIs, but to expand the data coverage in both temporal and wavelength domains. The problems encountered and the solutions applied to the deployment of a bare CCD, and with data acquisition and image reduction techniques is discussed. Sample geophysical data determined from the FPI fringe profiles is shown for our stations at Peach Mountain, Michigan, (funded by the CEDAR program) and Watson Lake, Yukon Territory (funded by a sounding rocket experiment sponsor). !12
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