LAGEOS Satellites Germanium Cube-Corner-Retroreflectors and the Asymmetric Reflectivity Effect |
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| Authors: | David M Lucchesi |
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| Institution: | (1) Istituto di Fisica dello Spazio Interplanetario, IFSI/CNR, Via Fosso del Cavaliere n. 100, 00133 Rome, Italy;(2) Istituto di Scienza e Tecnologie della Informazione, ISTI/CNR, Via Moruzzi n. 1, 56100 Pisa, Italy |
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| Abstract: | We propose a new analytical theory to explain the physical cause of the asymmetric reflectivity effect observed for the LAGEOS satellites. To achieve this result we have modelled the reflection of the Sun visible light from the four germanium Cube-Corner-Retroreflectors of these satellites. The position of the Cube-Corner-Retroreflectors play a crucial role in defining the characteristics of the effect and its impact in the satellites orbit. With this new approach we have been able to reproduce the temporal variation of the asymmetric reflectivity effect acceleration for LAGEOS, and to determine the main characteristic of the effect in the case of LAGEOS II. When considering the orbital elements, we have been able to reproduce the time evolution of LAGEOS eccentricity vector excitations and perigee rate. In the case of LAGEOS II, the asymmetric reflectivity effect need to be modelled with an analytical expression different from that previously introduced for LAGEOS.This revised version was published online in October 2005 with corrections to the Cover Date. |
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| Keywords: | asymmetric reflectivity effect Cube-Corner-Retroreflectors LAGEOS satellites non-gravitational perturbations |
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