The eccentric dipole

1967 ◽  
Vol 66 (1) ◽  
pp. 77-86 ◽  
Author(s):  
R. W. James ◽  
D. E. Winch
Keyword(s):  
Eccentric Dipole

LATITUDE EFFECT OF THE COSMIC RAY NUCLEON AND MESON COMPONENTS AT SEA LEVEL FROM THE ARCTIC TO THE ANTARCTIC

1956 ◽  
Vol 34 (9) ◽  
pp. 968-984 ◽  
Author(s):  
D. C. Rose ◽  
K. B. Fenton ◽  
J. Katzman ◽  
J. A. Simpson
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
The Arctic ◽  
High Latitudes ◽  
Geomagnetic Equator ◽  
Northern Latitudes ◽  
Latitude Effect ◽  
Nucleonic Component ◽  
The Antarctic ◽  
Eccentric Dipole

Results are presented of cosmic ray measurements taken at sea level during 1954–55 from the Arctic to the Antarctic. The equipment consisted of a neutron monitor and a meson telescope. Latitude effects of 1.77 for the nucleonic component and 1.15 for the meson component were measured. The longitude effect at the equator was much less than expected on the basis of the geomagnetic eccentric dipole and the longitude effect at intermediate northern latitudes shows that the longitude of the effective eccentric dipole is considerably west of that of the geomagnetic eccentric dipole. In a previous paper by the same authors, the positions of the equatorial minima were combined with other published cosmic ray measurements to calculate a new cosmic ray geomagnetic equator. In this paper new coordinates are derived on the assumption that these equatorial coordinates apply to a new eccentric dipole, and, therefore, that the equatorial coordinates may be extended to high latitudes. When the complete results are plotted on these coordinates, it is found that an eccentric dipole representation of the earth's magnetic field is inconsistent with the combined observations at all latitudes.

scholarly journals Distribution of Auroras in the Southern Hemisphere. II. Nightly Probability of Overhead Aurora

1962 ◽  
Vol 15 (2) ◽  
pp. 261 ◽  
Author(s):  
FR Bond ◽  
F Jacka
Keyword(s):  
Charged Particle ◽  
Southern Hemisphere ◽  
Equatorial Plane ◽  
Particle Motion ◽  
Geomagnetic Field ◽  
Integral Invariant ◽  
Probability Of Occurrence ◽  
The Earth ◽  
Charged Particle Motion ◽  
Eccentric Dipole

The probability P of overhead occurrence of aurora during a night is estimated for 22 southern hemisphere stations during the I.G.Y. The distribution of probability of occurrence is represented in terms of three measures of colatitude: 81 is defined in terms of the eccentric dipole representation of the geomagnetic field; 82 is defined in terms of projections from circles in the equatorial plane, along the geomagnetic lines of force, onto the Earth; 83 is defined in terms of the integral invariant f; (I-F IF m)!dl of charged particle motion in the geomagnetic field.

On the reaction field of an eccentric dipole

Physica ◽  
1946 ◽  
Vol 12 (4) ◽  
pp. 209-216 ◽  
Author(s):  
A.J. Dekker
Keyword(s):  
Reaction Field ◽  
Eccentric Dipole
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