A determination of the density of the upper atmosphere from the secular variations of the orbital elements of the first two artificial earth satellites

1961 ◽  
Vol 5 (1) ◽  
pp. 79
Keyword(s):  
Upper Atmosphere ◽  
Orbital Elements ◽  
Artificial Earth Satellites ◽  
Secular Variations ◽  
Artificial Earth

scholarly journals Motion of the Core, and Its Influence on the Earth's Axis

1972 ◽  
Vol 48 ◽  
pp. 185-188
Author(s):  
Jose Mateo
Keyword(s):  
Gravitational Force ◽  
Slow Motion ◽  
The Core ◽  
Artificial Earth Satellites ◽  
The Earth ◽  
Accurate Knowledge ◽  
Secular Variations ◽  
Artificial Earth ◽  
Rotation Of The Earth ◽  
Centers Of Mass

After the advent of artificial Earth satellites, an accurate knowledge of the harmonic coefficients of the Earth's potential has enabled us to determine the size and shape of the Earth with extraordinary accuracy.The gravitational force between the core and the rest of the Earth, which makes both centers of mass tend to coincide, is so enormous that there is a strong possibility of a very slow motion of the core forcing its way into the mantle. It includes secular variations in both latitude and the time of rotation of the Earth.

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