Three-dimensional ray paths in cylindrical ducts: Upper branch cold plasma O and X modes

Radio Science ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 1201-1214 ◽  
Author(s):  
H. G. James
Keyword(s):  
Cold Plasma ◽  
Three Dimensional ◽  
Ray Paths

Three-Dimensional Full-Wave Propagation Code for Cold Plasma

2004 ◽  
Vol 46 (2) ◽  
pp. 342-347 ◽  
Author(s):  
Pavel Popovich ◽  
W. Anthony Cooper ◽  
Laurent Villard
Keyword(s):  
Wave Propagation ◽  
Cold Plasma ◽  
Three Dimensional ◽  
Full Wave

Methods for computing ray paths in complex geological structures

1971 ◽  
Vol 61 (1) ◽  
pp. 27-53 ◽  
Author(s):  
G. G. Sorrells ◽  
J. B. Crowley ◽  
K. F. Veith
Keyword(s):  
Travel Time ◽  
High Velocity ◽  
Constant Velocity ◽  
Three Dimensional ◽  
Geological Structures ◽  
Thick Slab ◽  
Aleutian Arc ◽  
Ray Paths

abstract The mathematics for computing three-dimensional ray paths are developed for the case where medium consists of a series of constant-velocity layers separated by planes or spherical interfaces. These relations are used to investigate the cause of the LONGSHOT travel-time anomaly. The results of the investigation suggest that the anomaly could be caused by the presence of a thick slab of high-velocity material which dips steeply beneath the Aleutian arc and terminates at a depth of 300 km.

scholarly journals Cold plasma dispersion surfaces

1979 ◽  
Vol 21 (2) ◽  
pp. 205-224 ◽  
Author(s):  
M. E. Oakes ◽  
R. B. Michie ◽  
K. H. Tsui ◽  
J. E. Copeland
Keyword(s):  
Group Velocity ◽  
Cold Plasma ◽  
Three Dimensional ◽  
Plasma Waves ◽  
Geometrical Interpretation ◽  
Anisotropic Plasma ◽  
Clear Picture ◽  
Plasma Dispersion

Three-dimensional plots of dispersion in a cold anisotropic plasma are presented. The ω(κ, θ) surfaces provide a clear picture of the behaviour of cold plasma waves as the direction of propagation is varied. The group velocity (dω/dκ) has a simple geometrical interpretation on the surfaces.

scholarly journals Assessment of global navigation satellite system (GNSS) radio occultation refractivity under heavy precipitation

2018 ◽  
Vol 18 (16) ◽  
pp. 11697-11708 ◽  
Author(s):  
Ramon Padullés ◽  
Estel Cardellach ◽  
Kuo-Nung Wang ◽  
Chi O. Ao ◽  
F. Joseph Turk ◽  
...  
Keyword(s):  
Radio Occultation ◽  
Three Dimensional ◽  
Heavy Precipitation ◽  
Satellite System ◽  
Specific Humidity ◽  
Positive Bias ◽  
Actual Measurement ◽  
Excess Phase ◽  
Global Navigation Satellite ◽  
Ray Paths

Abstract. A positive bias at heights between 3 and 8 km has been observed when comparing the radio-occultation (RO)-retrieved refractivity with that of meteorological analyses and reanalyses in cases where heavy precipitation is present. The effect of precipitation in RO retrievals has been investigated as a potential cause of the bias, using precipitation measurements interpolated into the actual three-dimensional RO ray paths to calculate the excess phase induced by precipitation. The study consisted of comparing the retrievals when such extra delay is removed from the actual measurement and when it is not. The results show how precipitation itself is not the cause of the positive bias. Instead, we show that the positive bias is linked to high specific-humidity conditions regardless of precipitation. This study also shows a regional dependence of the bias. Furthermore, different analyses and reanalyses show a disagreement under high specific-humidity conditions and, in consequence, heavy precipitation.

General solution of the clemmow equation in a three-dimensional cold plasma, with a zero-velocity stream

1983 ◽  
Vol 37 (1) ◽  
pp. 33-38
Author(s):  
J. Blandin ◽  
R. Poxs ◽  
J. Skinazi ◽  
G. Marcilhacy
Keyword(s):  
General Solution ◽  
Cold Plasma ◽  
Three Dimensional ◽  
Zero Velocity

General solution of the clemmow equation in a three-dimensional cold plasma, with a zero-velocity stream

1983 ◽  
Vol 37 (2) ◽  
pp. 33-38
Author(s):  
J. Blandin ◽  
K. Pons ◽  
J. Skinazi ◽  
G. Marcilhacy
Keyword(s):  
General Solution ◽  
Cold Plasma ◽  
Three Dimensional ◽  
Zero Velocity
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