The rigidity dependence of forbush decreases observed at the Earth

1991 ◽  
Vol 96 (A4) ◽  
pp. 5447 ◽  
Author(s):  
J. A. Lockwood ◽  
W. R. Webber ◽  
H. Debrunner
Keyword(s):  
Forbush Decreases ◽  
The Earth ◽  
Rigidity Dependence

Rigidity dependence for Forbush decreases in 1968 compared with that for the 11-year variation

1970 ◽  
Vol 75 (34) ◽  
pp. 6885-6891 ◽  
Author(s):  
J. A. Lockwood ◽  
J. Lezniak ◽  
P. Singh ◽  
W. R. Webber
Keyword(s):  
Forbush Decreases ◽  
Rigidity Dependence

Rigidity Dependence of Forbush Decreases

1992 ◽  
Vol 10 (1) ◽  
pp. 24-26 ◽  
Author(s):  
M. L. Duldig ◽  
J. E. Humble
Keyword(s):  
Energy Range ◽  
Neutron Monitor ◽  
Forbush Decrease ◽  
Forbush Decreases ◽  
Neutron Monitor Data ◽  
Monitor Data ◽  
Rigidity Dependence

AbstractIna recent paper, Lockwood et al. (1991) have used IMP spacecraft and Neutron Monitor data to consider the rigidity dependence of three large Forbush Decreases over the energy range 50 MeV to 30 GeV. Some of their conclusions are extrapolated to higher energies. In an earlier paper (Duldig, 1987a), one of us discussed the need to consider the presence of isotropic intensity waves when determining the Forbush Decrease spectrum at energies up to a few hundred GeV. Lockwood et al.’s conclusions are discussed in the light of these results.

Rigidity dependence of Forbush decreases in the energy region exceeding the sensitivity of neutron monitors

2019 ◽  
Vol 63 (4) ◽  
pp. 1483-1489 ◽  
Author(s):  
M. Savić ◽  
N. Veselinović ◽  
A. Dragić ◽  
D. Maletić ◽  
D. Joković ◽  
...  
Keyword(s):  
Energy Region ◽  
Neutron Monitors ◽  
Forbush Decreases ◽  
Rigidity Dependence

The motion of a lunar orbiter

1966 ◽  
Vol 25 ◽  
pp. 373
Author(s):  
Y. Kozai
Keyword(s):  
Degrees Of Freedom ◽  
Dimensional Space ◽  
Artificial Satellite ◽  
Equations Of Motion ◽  
Triaxial Ellipsoid ◽  
The Moon ◽  
Secular Motion ◽  
The Earth ◽  
Close Satellite ◽  
The Mean

The motion of an artificial satellite around the Moon is much more complicated than that around the Earth, since the shape of the Moon is a triaxial ellipsoid and the effect of the Earth on the motion is very important even for a very close satellite.The differential equations of motion of the satellite are written in canonical form of three degrees of freedom with time depending Hamiltonian. By eliminating short-periodic terms depending on the mean longitude of the satellite and by assuming that the Earth is moving on the lunar equator, however, the equations are reduced to those of two degrees of freedom with an energy integral.Since the mean motion of the Earth around the Moon is more rapid than the secular motion of the argument of pericentre of the satellite by a factor of one order, the terms depending on the longitude of the Earth can be eliminated, and the degree of freedom is reduced to one.Then the motion can be discussed by drawing equi-energy curves in two-dimensional space. According to these figures satellites with high inclination have large possibilities of falling down to the lunar surface even if the initial eccentricities are very small.The principal properties of the motion are not changed even if plausible values ofJ3andJ4of the Moon are included.This paper has been published in Publ. astr. Soc.Japan15, 301, 1963.

Formation of Lunar Craters and Bright Rays as a Result of Meteorite Impacts

1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten
Keyword(s):  
Explosive Charge ◽  
The Moon ◽  
Meteorite Impacts ◽  
The Earth ◽  
Lunar Craters ◽  
The Impact

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.

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