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We report the first observations of simultaneous high?]latitude interhemispheric F region … neutral wind fields by combining the 630 nm optical measurements from two scanning … Doppler imagers (SDIs) and three Fabry?]Perot interferometers (FPIs) for a period … exceeding 5 h.
We report the first observations of simultaneous high-latitude inter-hemispheric F-region neutral wind fields by combining the 630 nm optical measurements from two scanning Doppler imagers and three Fabry-Perot interferometers for a period exceeding 5 hours on 3 October 2008.
La Trobe University has recently installed a new all-sky imaging Fabry-Perot spectrometer at Mawson Station, Antarctica. It is capable of recording independent spectra from many tens of locations across the sky simultaneously…
All-sky imaging Fabry-Perot spectrometers can provide two dimensional maps of thermospheric wind and temperature fields over a circular region spanning around 1400 km in diameter at F-region heights, or about half this in the E-region.
A new Scanning Doppler Imager (SDI) has been constructed and recently located to Mawson, Antarctica. The SDI is a separation scanning Fabry-Perot Interferometer (FPI) coupled to an all-sky lens and imaging detector. This permits rapid scanning of the interference fringes over most of the sky.
Large-etalon Fabry-Perot Spectrometers (FPS) measure upper atmosphere winds and temperatures by observing spectral profiles of atmospheric emission lines with sufficient resolution to determine the Doppler broadening, from which temperature is deduced…
For Emperor penguins (Aptenodytes forsteri), huddling is the key to survival during the Antarctic winter. Penguins in a … huddle are packed so tightly that individual movements become impossible, reminiscent of a jamming transition in … compacted colloids. It is crucial, however…
We report the first observations of simultaneous high-latitude interhemispheric … F-region neutral wind fields by combining the 630 nm optical … measurements from two scanning Doppler imagers (SDI) and three … Fabry-Perot interferometers (FPI) for a period exceeding 5 hours.
A new all-sky imaging Fabry-Perot spectrometer … has been installed at Mawson station (67360 S, 62520 E), Antarctica. This instrument is capable of recording independent … spectra from many tens of locations across the sky simultaneously. Useful operation began in March 2007…
A new all-sky imaging Fabry-Perot spectrometer has been installed at … Mawson station (67°36' S, 62°52' E), Antarctica. This instrument is capable … of recording independent spectra from many tens of locations across the sky … simultaneously. Useful operation began in March 2007…
An 11 year climatology (1995-2005) of mesopause region temperatures over Davis station, Antarctica (68°S, 78°E) has been derived from hydroxyl rotational spectra measured using a … scanning spectrometer.
A numerical procedure is presented for analysis of backscatter spectra recorded by an atmospheric Doppler lidar experiment. The recorded spectra are modelled by an analytic function of five parameters.
High-resolution Fabry-Perot spectrometer observations of the OH(62) Q1(1) line, l834.46 nm, were made at Mawson, 67.6ºS 62.9ºE, and Davis, 68.6ºS 78.0ºE, Antarctica, in 1997. The observing program resulted in three sets of continuous OH observations suitable for tidal analysis: July 25…
Ground-based Fabry-Perot spectrometer observations from the Australian Antarctic stations of Davis and Mawson show an upward wind ~100 m s-1 in the thermosphere at ~240 km altitude on the night of Day of Year 159 in 1997.
The thermopheric oxygen l630 nm emission has been observed using high-resolution Fabry-Perot spectrometers at Mawson (67.6°S, 62.9°E) and Davis (68.6°S, 78.0°E), Antarctica. A new technique, combining the results from the two instruments, is used to derive vector wind fields.
Two simulation programmes have been written as aids to the design of Fabry-Perot interferometers. The use of the Modulation Transfer Function (MTF) vis-a-vis the Aperture Function is discussed and an example given. Other features of the simulations are described briefly.