Earth Albedo perturbations on Low Earth Orbit Cubesats

Title & Authors
Earth Albedo perturbations on Low Earth Orbit Cubesats
Khalifa, N.S.; Sharaf-Eldin, T.E.;

Abstract
This work investigates the orbital perturbations of the cubesats that lie on LEO due to Earth albedo. The motivation for this paper originated in the investigation of the orbital perturbations for closed- Earth pico-satellites due to the sunlight reflected by the Earth (the albedo). Having assumed that the Sun lies on the equator, the albedo irradiance is calculated using a numerical model in which irradiance depends on the geographical latitude, longitude and altitude of the satellite. However, in the present work the longitude dependency is disregarded. Albedo force and acceleration components are formulated using a detailed model in a geocentric equatorial system in which the Earth is an oblate spheroid. Lagrange planetary equations in its Gaussian form are used to analyze the orbital changes when $\small{e{\neq}0}$ and $\small{i{\neq}0}$. Based on the Earth's reflectivity data measured by NASA Total Ozone Mapping Spectrometer (TOMS project), the orbital perturbations are calculated for some cubesats. The outcome of the numerical test shows that the albedo force has a significant contribution on the orbital perturbations of the pico-satellite which can affect the satellite life time.
Keywords
cubesat specifications;terrestrial albedo;NASA Total Ozone Mapping Spectrometer (TOMS Project);radiative force;geocentric equatorial coordinate systems;Lagrange planetary equations;
Language
English
Cited by
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