Doubly averaged effect of the Moon and Sun on a high altitude Earth satellite orbit

1976 ◽  
Vol 14 (2) ◽  
pp. 209-238 ◽  
Author(s):  
Michael E. Ash
Keyword(s):  
High Altitude ◽  
Satellite Orbit ◽  
Earth Satellite ◽  
The Moon ◽  
Earth Satellite Orbit

scholarly journals Scientific Need for Space Astronomy

1980 ◽  
Vol 5 ◽  
pp. 63-68
Author(s):  
L. Goldberg
Keyword(s):  
High Altitude ◽  
Phase 1 ◽  
Satellite Orbit ◽  
Earth Satellite ◽  
Second Phase ◽  
National Academy Of Sciences ◽  
Space Astronomy ◽  
Small Satellites ◽  
Time Space ◽  
Two Phases

Many scientific justifications for space astronomy have been prepared by individuals and committees during the past three decades or more. The first such report that I am aware of, called “Astronomical Advantages of an Extraterrestrial Observatory”, was written by Lyman Spitzer in September 1946, and although its goals were extremely modest by today’s standards, the report did dwell with enthusiasm on the ultimate goal of a large reflecting telescope 4-6 meters in diameter with diffraction-limited optics put into earth-satellite orbit. The latest study, from which I shall quote liberally, has just been published by the Astronomy Committee of the U. S. National Academy of Sciences, and provides the scientific foundation for space astronomy in the 1980’s. Space Astronomy was initiated about one month after the date of publication of Spitzer’s report, when the first high-altitude rocket was launched to observe the sun’s ultraviolet radiation. Since that time, space astronomy has completed two phases and is about to embark on a third. In Phase 1, which lasted until the beginning of Sputnik, observations were made for a few minutes at a time from high-altitude rockets. In the second phase, which is just ending, observations were made with relatively small instruments in earth-orbiting satellites. The observing programs carried out with rockets and small satellites were called experiments because their capabilities and objectives were limited and their lifetimes were short -from a few minutes to about a year.

Dynamical Model Compensation for Near-Earth Satellite Orbit Determination

AIAA Journal ◽  
1975 ◽  
Vol 13 (3) ◽  
pp. 343-349 ◽  
Author(s):  
KENNETH A. MYERS ◽  
BYRON D. TAPLEY
Keyword(s):  
Orbit Determination ◽  
Satellite Orbit ◽  
Earth Satellite ◽  
Dynamical Model ◽  
Earth Satellite Orbit

Effect of an oblate rotating atmosphere on the orientation of a satellite orbit

1961 ◽  
Vol 261 (1305) ◽  
pp. 246-258 ◽  
Keyword(s):  
Orbital Plane ◽  
Satellite Orbit ◽  
Major Axis ◽  
Earth Satellite ◽  
Semi Major Axis ◽  
Orbital Inclination ◽  
Small Eccentricity ◽  
Earth Satellite Orbit ◽  
The Right ◽  
Right Ascension

For an earth satellite orbit of small eccentricity ( e < 0·2) formulae are derived for the changes per revolution produced by the atmosphere in the argument of perigee, in the right ascension of the ascending node, and in the orbital inclination. These changes are then expressed in terms of the change in length of the semi-major axis, and numerical values are obtained for satellite 1957 β . It is found that the rotation of the major axis in the orbital plane due to the atmosphere is significant, being most important for inclinations between 60 and 70°. The total rotation, due both to the gravitational potential and to the atmosphere, agrees reasonably well with the observed values. The oblateness of the atmosphere is found to have only a small effect on the changes in the orbital inclination and the right ascension of the ascending node.

On active and passive CETI from an earth satellite orbit

1979 ◽  
Vol 6 (1-2) ◽  
pp. 203-212 ◽  
Author(s):  
Mieczyslaw Subotowicz ◽  
Jerzy Usowicz ◽  
Zbigniew Paprotny
Keyword(s):  
Satellite Orbit ◽  
Earth Satellite ◽  
Earth Satellite Orbit
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