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Interview with Margie Mitchell
Margie Mitchell
Jan 01, 0001
Interview with Margie Mitchell, daughter of 2003 South Carolina Mother of the Year, Marjorie Rivers Mitchell, and member of the South Carolina Mother of the Year Selection Committee.
Published by: Winthrop University
Interview with William Franklin Mitchell - VHP 011
William Franklin Mitchell
Jan 01, 0001
In his February 24, 2004 interview with Georgia Williamson, William Franklin Mitchell describes life as a volunteer chaplain for the army during WWII. Specifically, Mitchell shares the reason why he joined the service and what...
Published by: Winthrop University
An Attempt at a Physico-Chemical Explanation of Certain Groups of Fluctuating Variation
Jacques Loeb and Mary Mitchell Chamberlain. An attempt at a Physico-chemical explanation of certain groups of fluctuating variation
Reprinted from Exp. Zool., 1915, 19(4): 559-568
Published by: Rockefeller University
Isolating the multipath component in GNSS signal-to-noise data and locating reflecting objects
A filter to separate the effect of multipath in Global Navigation Satellite System (GNSS) signal-to-noise ratio (SNR) data is presented. The filter removes multipath cleanly, and affects neither slowly varying trends (such as...
Imaging of 3-D plasmaspheric electron density using GPS to LEO satellite differential phase observations
This paper outlines a new mathematical approach to imaging the electron density distribution in the high regions of the topside ionosphere and the plasmasphere from 800 km up to 20,200 km altitude using GPS measurements from low...
Isolating the multipath component in GNSS signal-to-noise data and locating reflecting objects
A filter to separate the effect of multipath in Global Navigation Satellite System (GNSS) signal-to-noise ratio (SNR) data is presented. The filter removes multipath cleanly, and affects neither slowly varying trends (such as...
Reduction in the ionospheric error for a single-frequency GPS timing solution using tomography
Single-frequency Global Positioning System (GPS) receivers do not accurately compensate for the ionospheric delay imposed upon a GPS signal. They rely upon models to compensate for the ionosphere. This delay compensation can be...
Imaging of 3-D plasmaspheric electron density using GPS to LEO satellite differential phase observations
This paper outlines a new mathematical approach to imaging the electron density distribution in the high regions of the topside ionosphere and the plasmasphere from 800 km up to 20,200 km altitude using GPS measurements from low...
A study of L-band scintillations and total electron content at an equatorial station, Lagos, Nigeria
A O Adewale, E O Oyeyemi, A B Adeloye, Cathryn N Mitchell, Julian A R Rose, P J Cilliers
Apr 07, 2012
In this paper we present the first results from measurements of scintillation and total electron content (TEC) from an equatorial station, Lagos (Latitude 6.5 N, Longitude 3.4 E, magnetic latitude 3.03 S), Nigeria, using a...
Four-dimensional electrical capacitance tomography imaging using experimental data
Electrical capacitance tomography (ECT) is a relatively mature non-invasive imaging technique that attempts to map dielectric permittivity of materials. ECT has become a promising monitoring technique in industrial process...
A 12 year comparison of MIDAS and IRI 2007 ionospheric Total Electron Content
Data assimilation in conventional meteorological applications uses measurements in conjunction with a physical model. In the case of the ionised region of the upper atmosphere, the ionosphere, assimilation techniques are much...
A realistic simulation framework to evaluate ionospheric tomography
Observation of the 3-dimensional (3-D) electron density of the ionosphere is useful to study large-scale physical processes in space weather events. Ionospheric data assimilation and ionospheric tomography are methods that...
Incoherent scatter radar IONOSPHERE MIDAS Tomography /dk/atira/pure/subjectarea/asjc/2200/2202 name=Aerospace Engineering /dk/atira/pure/subjectarea/asjc/3100/3103 name=Astronomy and Astrophysics /dk/atira/pure/subjectarea/asjc/1900/1908 name=Geophysics /dk/atira/pure/subjectarea/asjc/1900/1902 name=Atmospheric Science /dk/atira/pure/subjectarea/asjc/1900/1912 name=Space and Planetary Science /dk/atira/pure/subjectarea/asjc/1900/1900 name=General Earth and Planetary Sciences
Reduction in the ionospheric error for a single-frequency GPS timing solution using tomography
Single-frequency Global Positioning System (GPS) receivers do not accurately compensate for the ionospheric delay imposed upon a GPS signal. They rely upon models to compensate for the ionosphere. This delay compensation can be...
The use of ionospheric tomography and elevation masks to reduce the overall error in single-frequency GPS timing applications
Signals from Global Positioning System (GPS) satellites at the horizon or at low elevations are often excluded from a GPS solution because they experience considerable ionospheric delays and multipath effects. Their exclusion...
Four-dimensional electrical capacitance tomography imaging using experimental data
Electrical capacitance tomography (ECT) is a relatively mature non-invasive imaging technique that attempts to map dielectric permittivity of materials. ECT has become a promising monitoring technique in industrial process...
The use of ionospheric tomography and elevation masks to reduce the overall error in single-frequency GPS timing applications
Signals from Global Positioning System (GPS) satellites at the horizon or at low elevations are often excluded from a GPS solution because they experience considerable ionospheric delays and multipath effects. Their exclusion...
A study of L-band scintillations and total electron content at an equatorial station, Lagos, Nigeria
A O Adewale, E O Oyeyemi, A B Adeloye, Cathryn N Mitchell, Julian A R Rose, P J Cilliers
Apr 07, 2012
In this paper we present the first results from measurements of scintillation and total electron content (TEC) from an equatorial station, Lagos (Latitude 6.5 N, Longitude 3.4 E, magnetic latitude 3.03 S), Nigeria, using a...
A realistic simulation framework to evaluate ionospheric tomography
Observation of the 3-dimensional (3-D) electron density of the ionosphere is useful to study large-scale physical processes in space weather events. Ionospheric data assimilation and ionospheric tomography are methods that...
Incoherent scatter radar IONOSPHERE MIDAS Tomography /dk/atira/pure/subjectarea/asjc/2200/2202 name=Aerospace Engineering /dk/atira/pure/subjectarea/asjc/3100/3103 name=Astronomy and Astrophysics /dk/atira/pure/subjectarea/asjc/1900/1908 name=Geophysics /dk/atira/pure/subjectarea/asjc/1900/1902 name=Atmospheric Science /dk/atira/pure/subjectarea/asjc/1900/1912 name=Space and Planetary Science /dk/atira/pure/subjectarea/asjc/1900/1900 name=General Earth and Planetary Sciences
A 12 year comparison of MIDAS and IRI 2007 ionospheric Total Electron Content
Data assimilation in conventional meteorological applications uses measurements in conjunction with a physical model. In the case of the ionised region of the upper atmosphere, the ionosphere, assimilation techniques are much...
New method for tracking the movement of ionospheric plasma
A method to track the flow of plasma in the Earth's ionosphere is presented. This takes maps of total electron content (TEC) at various times, and by comparing them derives a map of bulk velocities. The method is a modification...
A comparison of the relative effect of the Earth’s Quasi-D.C. and A.C. electric field on Gradient Drift Waves in large-scale plasma structures in the polar regions
Radio signals traversing polar-cap plasma patches and other large-scale plasma structures in polar regions are prone to scintillation. This implies that irregularities in electron concentration often form within such structures....
New method for tracking the movement of ionospheric plasma
A method to track the flow of plasma in the Earth's ionosphere is presented. This takes maps of total electron content (TEC) at various times, and by comparing them derives a map of bulk velocities. The method is a modification...
Tomographic Imaging of Traveling Ionospheric Disturbances Using GNSS and Geostationary Satellite Observations
Abstract Traveling ionospheric disturbances (TIDs) are the manifestations of atmospheric gravity waves in the ionosphere. These disturbances have practical importance because they affect satellite navigation technologies such as...
Polar-cap plasma patch primary linear instability growth-rates compared
Four primary plasma instability processes have been proposed in the literature to explain the generation of phase scintillation associated with polar-cap plasma patches. These are the Gradient Drift, Current Convective and...
Satellite-beacon Ionospheric-scintillation Global Model of the upper Atmosphere (SIGMA) II
K. D. Deshpande, G. S. Bust, C. R. Clauer, W. A. Scales, N. A. Frissell, J. M. Ruohoniemi, L. Spogli, Cathryn Mitchell, A. T. Weatherwax
Sep 28, 2016
Complex magnetosphere-ionosphere coupling mechanisms result in high-latitude irregularities that are difficult to characterize using only Global Navigation Satellite System (GNSS) scintillation measurements. However, GNSS...
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