An All-Sky Imaging Poly-Etalon Fabry-Pérot System to Observe 630nm Oxygen Emissions: Preliminary Observations and Calibrations from Millstone Hill.

Details An All-Sky Imaging Poly-Etalon Fabry-Pérot System to Observe 630nm Oxygen Emissions: Preliminary Observations and Calibrations from Millstone Hill. An All-Sky Imaging Poly-Etalon Fabry-Pérot System to Observe 630nm Oxygen Emissions: Preliminary Observations and Calibrations from Millstone Hill.

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh31b..06n&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH31B-06

Computer Science

Performance

9805 Instruments Useful In Three Or More Fields, 0310 Airglow And Aurora, 0394 Instruments And Techniques

Scientific paper

An all-sky triple Fabry-Pérot system with a theoretical spectral resolution of 1.7pm and a Free Spectral Range of 0.39nm, designed for measurements of oxygen emission, has been built and assembled at the Haystack observatory in Millstone Hill. The all-sky imaging poly-etalon Fabry-Perot system is used to monitor thermospheric dynamics and temperatures at the Millstone Hill Aeronomical Observatory. Oxygen 630.0nm emission is monitored to determine thermospheric vector wind velocities simultaneously in multiple wedges over a 120 degree field of view from measurement of the Doppler shift of the emission line. Line width is used to determine thermospheric temperatures at 300 Km. Maps of all-sky wind velocity and temperatures are presented. The challenge of making a similar measurement during the day lies in the ability to separate the weak 630.0nm dayglow emission (1.5 kiloRayleigh) from the very brighter scattered solar component (50000 kiloRayleigh/nm). A high spectral resolution Fabry-Perot system is required to reject a good fraction of the unwanted background. Presented here will be a comparison of modeled instrument performance to preliminary daytime calibrations of the instrument. This instrument is to be deployed in the Scientific Solutions airglow observatory at the Cerro Tololo observatory (30.17S 70.81W) in Chile. Post deployment observation will be made in conjunction with two other Clemson University Fabry-Perots in Peru creating a longitudinal chain of interferometers for thermospheric observations. These instruments will make autonomous day and nighttime observations of thermospheric dynamics. Instruments of this type can be constructed for a global chain of autonomous airglow observatories.

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