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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 simplified three dimensional, time-dependant model of a local region of Earth's thermosphere is being developed to investigate dynamical processes occurring over spatial scales of less than 100 km. Because hydrostatic equilibrium is not enforced in the model…
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…
We report the first observations of E-region neutral wind fields and their … interaction with auroral arcs at meso-scale spatial resolution during … geomagnetically quiet conditions at Mawson, Antarctica. This was achieved by … using a scanning Doppler imager…
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.
We report the first observations of E region neutral wind fields and their interaction … with auroral arcs at mesoscale spatial resolution during geomagnetically quiet conditions at … Mawson, Antarctica. This was achieved by using a scanning Doppler imager…
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 local scale, time dependent three-dimensional … model of the neutral thermosphere was used to test the applicability … of two previously published empirical relations between … thermospheric vertical wind and velocity divergence, i.e., those due to Burnside et al. (1981) and Brekke (1997).
Superposed epoch analysis (SEA) was used to examine ionospheric drift velocities measured by a digital … ionosonde located at the mid-latitude station Bundoora (145.11E, 37.71S geographic), near Melbourne. The control times for the SEA were the times of cloud-to-ground (CG)…
Mid-latitude Digisonde Doppler velocities, auroral electrojet (AE) indices and cloud-to-ground (CG) lightning strokes during August 2003–2004 were used to study the perturbations in the F-region … vertical drift associated with terrestrial thunderstorms. A superposed epoch analysis (SEA)…
The Harang reversal is a prominent feature frequently observed in the electric and … magnetic field patterns in the high-latitude auroral zone and plays an important role … in substorm dynamics. A comprehensive set of instruments, including Super Dual Auroral … Radar Network (SuperDARN)…
SuperDARN radars are sensitive to the collective … Doppler characteristics of decametre-scale irregularities in … the high latitude ionosphere. The radars routinely observe … a distinct transition from large spectral width (>100ms−1) located at higher latitudes to low spectral width…
Bursty bulk flows are understood to be the predominant flux transport mechanism in the … magnetotail.
A magnetic cloud in the solar wind impinged the Earths magnetosphere on the 7th January … 2005. Episodic enhancements in the coupling of solar wind energy initiated a familiar sequence … of Geospace events including a succession of substorms of increasing intensity throughout the … day.
The correct identification of ionospheric echoes and 'ground' or 'sea' echoes is important to a … wide variety of studies using SuperDARN radar data. FITACF correctly distinguishes the … majority of ionospheric and ground echoes…