An overview of shadow models implementations on LEO and MEO orbits.

Solar Radiation Pressure (SRP) plays a crucial role for Precise Orbit Determination of artificial satellites as it has been proven to be one of its major error sources. An essential parameter used for the calculation of SRP is the eclipse factor. To determine this factor along the orbit of the satellite, various shadow models have been implemented. The aim of this study is to investigate the differences the geometries of the models applied have, in different altitude orbits. To achieve this, we evaluate the results of shadow models used in the bibliography (ECSM, ESCM, Lunar shadow) along various Low Earth Orbits (LEO) and Medium Earth Orbits (MEO) satellites and demonstrate the effect of the geometries used in both cases. The study displays an overview of the results of each implementation and its computational complexity, as to provide an insight to researchers for which model to adopt when implementing an SRP model on LEO and MEO orbits.