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Keo Scientific’s Arinae Fabry-Pérot Interferometers (FPIs) use narrow, pointable field-of-views to determine lower thermospheric temperatures and wind vectors. The FPI is available in several different sizes, specified by the diameter of the etalon’s aperture. Currently, we offer 70mm and 100mm versions although larger versions are possible if desired.
|Etalon Aperture Diameter [mm]||70||100|
|Wind Error [m/s]||< 3-5||< 2-4|
|Temperature Error [K]||15-20||9-12|
|Field of View [deg]||2.5||2.5|
Field-of-view pointing is achieved using a Keo SkyScan articulated mirror assembly [link to Skyscan page] which allows for pointing the FPI’s narrow field-of-view to any point in the sky.
Our custom apochromatic lens provides unparalleled flatness and sharpness to the fringe patterns.
All FPI systems include a stabilized 632.8nm HeNe laser source and diffusing panel which is used for collection of laser calibration images during routine observations.
The etalon is thermally stabilized above ambient temperature to +/-0.02 C over 1 hour.
Standard FPI systems are provided with a back-thinned, deep-cooled 13.3mm CCD but can be customized with EMCCDs or larger CCDs to increase SNR.
Ephemerides-driven A3O instrument control & data acquisition software package is pre-installed and thoroughly tested on the provided computer system.