Magnitude of Solar Radiation Torque in the Transition Region from the Umbra to the Dark Shadow of the Earth

17th Brazilian Colloquium on Orbital Dynamics

Cabette, R.E.S.^1 ; Zanardi, M.C.^2 ; Kolesnikov, I.^1

São Paulo Salesian University, UNISAL, Dom Bosco Street 284, Lorena, SP, Brazil^1

Federal University of ABC, UFABC, Avenue of the States, 5001, Santo-André, SP, Brazil^2

关键词: Data collection;    Earth's shadow function;    Right ascensions;    Satellite attitude;    Satellite transitions;    Solar radiation pressure;    Solar radiation torque;    Transition regions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/641/1/012023/pdf
DOI  :  10.1088/1742-6596/641/1/012023

来源: IOP

【 摘 要 】

The analysis of solar radiation pressure force and its influence on the motion of artificial satellites has been developed by researchers. Accurate models to describe the influence of the Earth's shadow on the torque and force due to solar radiation pressure have been presented. In this work the solar radiation torque (SRT) and its influence on the attitude of an artificial satellite are taken into account by the introduction of the Earth's shadow function in the equations of motion. This function assumes a unitary value when the satellite is in the fully illuminated region of its orbit, and the value zero for the full shade region. The main objective of this study is to analyze the magnitude of SRT using the equations described by quaternions during a 35 day period and to compare the results with the satellite transition through the shadow region and the time interval in this region. The duration and transition through the shadow region were obtained using the software "Shadow Conditions of Earth Satellites". The formulation is applied to the Brazilian Data Collection Satellites SCD1 and SCD2, and the torque model is presented in terms of the satellite attitude quaternion, distance of the satellite to the Sun, orbital elements, right ascension and declination of the Sun.