Effect of solar eclipses on the LAGEOS semimajor axis

Details Effect of solar eclipses on the LAGEOS semimajor axis Effect of solar eclipses on the LAGEOS semimajor axis

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gbrp.reptq....r&link_type=abstract

In its Geodyn. Branch Res. Program 3 p (SEE N85-31688 20-46)

Computer Science

Lageos (Satellite), Orbit Calculation, Orbit Perturbation, Radiation Pressure, Solar Eclipses, Computer Programs, Earth Albedo, Orbital Mechanics, Solar Radiation

Scientific paper

The effect of solar eclipses on the orbit of Lageos is studied. The orbit determination computer programs currently in use include this effect when they integrate the orbit. They also take into account the interruption of sunlight when Lageos moves into the Earth's shadow. These programs do not, in most cases, at present take into account the diminution of radiation pressure when Lageos moves into the Moon's shadow, i.e., suffers a solar eclipse by entering the Moon's umbra or penumbra. This diminution will affect Lageos' orbit by weakening for a time the radiation pressure acting on the satellite, thus perturbing the orbit differently from what it would if full sunlight were shining. The importance of this effect must be assessed for Lageos' orbit. An accurate orbit is necessary for Lageos to accomplish its mission of monitoring tectonic plate motion, polar motion, and Earth rotation.

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