scholarly journals Monitoring the three-dimensional ionospheric electron density distribution using GPS observations over China

2007 ◽  
Vol 116 (3) ◽  
pp. 235-244 ◽  
Author(s):  
Debao Wen ◽  
Yunbin Yuan ◽  
Jikun Ou
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Three Dimensional ◽  
Ionospheric Electron Density ◽  
Gps Observations

Improved three-dimensional mapping of the electron density distribution of the solar corona

Solar Physics ◽  
1973 ◽  
Vol 28 (2) ◽  
pp. 435-456 ◽  
Author(s):  
R. Michael Perry ◽  
Martin D. Altschuler
Keyword(s):  
Density Distribution ◽  
Solar Corona ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Three Dimensional ◽  
Three Dimensional Mapping ◽  
Dimensional Mapping

scholarly journals Building brain network in electron density map determined by micro-CT

2014 ◽  
Vol 70 (a1) ◽  
pp. C1752-C1752
Author(s):  
Rino Saiga ◽  
Susumu Takekoshi ◽  
Naoya Nakamura ◽  
Akihisa Takeuchi ◽  
Kentaro Uesugi ◽  
...  
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Model Building ◽  
Three Dimensional ◽  
Brain Network ◽  
X Ray ◽  
Density Maps ◽  
Density Map ◽  
Electron Density Map

In macromolecular crystallography, an electron density distribution is traced to build a model of the target molecule. We applied this method to model building for electron density maps of a brain network. Human cerebral tissue was stained with heavy atoms [1]. The sample was then analyzed at the BL20XU beamline of SPring-8 to obtain a three-dimensional map of X-ray attenuation coefficients representing the electron density distribution. Skeletonized wire models were built by placing and connecting nodes in the map [2], as shown in the figure below. The model-building procedures were similar to those reported for crystallographic analyses of macromolecular structures, while the neuronal network was automatically traced by using a Sobel filter. Neuronal circuits were then analytically resolved from the skeletonized models. We suggest that X-ray microtomography along with model building in the electron density map has potential as a method for understanding three-dimensional microstructures relevant to biological functions.

Three dimensional atomistic-scale electron density distribution analysis of ZnWO4: Sm phosphors

Optik ◽  
2021 ◽  
pp. 168169
Author(s):  
S. Saravanakumar ◽  
D. Sivaganesh ◽  
V. Sivakumar ◽  
Yang Li ◽  
Rajajeyaganthan Ramanthan ◽  
...  
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Three Dimensional ◽  
Distribution Analysis

scholarly journals A Method for Determining the Electron Density Distribution about the F2 Peak of the Ionosphere

1972 ◽  
Vol 25 (3) ◽  
pp. 293
Author(s):  
PL Dyson
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Ionospheric Electron Density ◽  
Density Profiles ◽  
Electron Density Profiles ◽  
Limited Accuracy ◽  
Ground Echoes

A method is given for extending the analysis of topside ionograms to yield ionospheric electron density profiles down to and below hmax, the peak of the F2 layer, by analysis of the ground echoes. Calculations using model ionospheres indicate that the accuracy of the method is not seriously affected by the assumptions made or by the limited accuracy with which ionograms can be scaled.

Quantitative Description of the pB and Electron Density Distributions around the Inferred Neutral Line

1994 ◽  
Vol 144 ◽  
pp. 427-430
Author(s):  
M. Guhathakurta
Keyword(s):  
Density Distribution ◽  
Current Sheet ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Neutral Line ◽  
Quantitative Description ◽  
Three Dimensional ◽  
Density Distributions ◽  
Dimensional Distribution

AbstractWe have investigated the three-dimensional distribution of the polarization brightness product (pB) and inferred the electron density distribution relative to the heliographic current sheet during the declining phase of cycle 20 (1973-1976). From the study we observe that the polar and current sheet densities do not vary during the last third of the cycle.

Analysis of ionospheric electron density distribution from GPS/MET occultations

1998 ◽  
Vol 36 (2) ◽  
pp. 383-394 ◽  
Author(s):  
A. Rius ◽  
G. Ruffini ◽  
A. Romeo
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Ionospheric Electron Density
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