Optical properties of the earth's surface and long-term perturbations of LAGEOS's semimajor axis

Details Optical properties of the earth's surface and long-term perturbations of LAGEOS's semimajor axis Optical properties of the earth's surface and long-term perturbations of LAGEOS's semimajor axis

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.7121l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. B5, May 10, 1992, p. 7121-7128. Research supported by ASI.

Statistics

Computation

11

Earth Surface, Lageos (Satellite), Optical Properties, Orbit Calculation, Radiation Pressure, Satellite Orbits, Long Term Effects, Mathematical Models, Orbit Perturbation, Solar Radiation, Wave Reflection

Scientific paper

The numerical model of Rubincam et al. (1987) for estimating the maxiumum along-track orbit-average perturbative acceleration (T) on LAGEOS's orbit due to radiation pressure from sunlight anisotropically reflected by the oceans is reproduced. It is shown that this model leads to a wide range of values when the current uncertainty about the optical behavior of the oceans is properly accounted for. Taking into account that a more realistic model of the earth's surface would lead to values of (T) smaller by a factor of 1.5 to 2 than the estimated upper bounds, it can be expected that the peak values of (T) range between about 0.7 and 3 x 10 exp -12 m/sq s. The present computations confirm the conclusion of Verlier et al. (1986) and Rubincam and Weiss (1986) that diffused sunlight (including not only Lambertian isotropic diffusion, but every time-independent diffusion pattern depending only on the local zenith angle) does not contribute to (T) for a satellite having a circular orbit around a spherical planet.

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