Explanipedia

BepiColombo MPO Science Planning Concept Open

Jayne Lefort, H. R. Middleton, Jonathan McAuliffe, Sara de la Fuente, J. Benkhoff , et al. · 2010

The proposed science operations concept for the BepiColombo Mercury Planetary Orbiter is presented. Building on lessons learnt from previous ESA planetary missions, the manner in which the mission constraints drive the planning concept and…

Modelling the tongue-of-ionisation using CTIP with SuperDARN electric potential input: verification by radiotomography Open

S. E. Pryse, E. L. Whittick, A. D. Aylward, H. R. Middleton, D. S. Brown , et al. · 2009

Electric potential patterns obtained by the SuperDARN radar network are used as input to the Coupled Thermosphere-Ionosphere-Plasmasphere model, in an attempt to improve the modelling of the spatial distribution of the ionospheric plasma a…

Multi-instrument observations of nightside plasma patches under conditions of IMF <I>B<sub>z</sub></I> positive Open

Alan Wood, S. E. Pryse, H. R. Middleton, V. S. C. Howells · 2008

Results are presented from two multi-instrument case studies showing patches of cold, long-lived plasma in the winter nightside ionosphere during times when the z-component of the Interplanetary Magnetic Field (IMF Bz) was positive. These …

The Solar Eruption of 2005 May 13 and Its Effects: Long-Baseline Interplanetary Scintillation Observations of the Earth-Directed Coronal Mass Ejection Open

A. R. Breen, R. A. Fallows, M. M. Bisi, Richard A. Jones, B. V. Jackson , et al. · 2008

Long-baseline observations of interplanetary scintillation (IPS) provide a unique source of information on solar wind speed and meridional direction across the inner regions of the solar system. We report the results of a series of coordin…

The role of the tongue‐of‐ionization in the formation of the poleward wall of the main trough in the European post‐midnight sector Open

H. R. Middleton, S. E. Pryse, Alan Wood, R. L. Balthazor · 2008

A series of radio tomography reconstructions from the University of Wales Aberystwyth receiver chains in Scandinavia and the UK, imaging the midnight‐dawn sector on 13 December 2001, reveal a persistent large‐scale electron density enhance…

Llif yr atmosffer drydanol dros begwn y gogledd Open

S. E. Pryse, H. R. Middleton, Alan Wood · 2007

EISCAT observations of plasma patches at sub-auroral cusp latitudes Open

J. Moen, H. C. Carlson, K. Oksavik, C. P. Nielsen, S. E. Pryse , et al. · 2006

A sequence of 3 patches of high-density (1012 m−3) cold plasma on a horizontal scale-size of 300–700 km was observed near magnetic noon by the EISCAT VHF radar above Svalbard on 17 December 2001. The patches followed a trajectory towards t…

Reconfiguration of polar-cap plasma in the magnetic midnight sector Open

S. E. Pryse, Alan Wood, H. R. Middleton, I. W. McCrea, M. Lester · 2006

Radio tomography and the EISCAT and SuperDARN radars have been used to identify long-lived, high-altitude, cold plasma in the antisunward convective flow across the polar cap. The projection of the feature to later times suggests that it w…

The dayside high-latitude trough under quiet geomagnetic conditions: Radio tomography and the CTIP model Open

S. E. Pryse, K. L. Dewis, R. L. Balthazor, H. R. Middleton, M. H. Denton · 2005

The dayside high-latitude trough is a persistent feature of the post-noon wintertime auroral ionosphere. Radio tomography observations have been used to map its location and latitudinal structure under quiet geomagnetic conditions (Kp≤2) n…

First direct evidence of meso-scale variability on ion-neutral dynamics using co-located tristatic FPIs and EISCAT radar in Northern Scandinavia Open

A. L. Aruliah, E. M. Griffin, A. D. Aylward, E. A. K. Ford, M. J. Kosch , et al. · 2005

This paper presents the first direct empirical evidence that mesoscale variations in ion velocities must be taken into consideration when calculating Joule heating and relating it to changes in ion temperatures and momentum transfer to the…

Mean winds of the mesosphere and lower thermosphere at 52° N in the period 1988–2000 Open

H. R. Middleton, N. J. Mitchell, Heinz Müller · 2002

A meteor radar in the UK (near 52° N) has been used to measure the mean winds of the mesosphere/lower-thermosphere (MLT) region over the period 1988–2000. The seasonal course and interannual variability is characterised and comparisons are…

Mean winds and tides in the Arctic mesosphere and lower thermosphere Open

N. J. Mitchell, D. Pancheva, H. R. Middleton, M. E. Hagan · 2002

A new meteor radar has been deployed at Esrange (68°N, 21°E) near Kiruna in Sweden. The radar has been used to measure winds and tides in the Arctic mesosphere/lower thermosphere region over the interval August 1999 to July 2000. Conspicuo…

The 16-day planetary wave in the mesosphere and lower thermosphere Open

N. J. Mitchell, H. R. Middleton, A.G. Beard, P. J. S. Williams, Heinz Müller · 1999

A meteor radar located at Sheffield in the UK has been used to measure wind oscillations with periods in the range 10–28 days in the mesosphere/lower-thermosphere region at 53.5°N, 3.9°W from January 1990 to August 1994. The data reveal a …

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