Comparison of two model of aerodynamic drag used for ISS orbital motion prediction

The paper considers an approach to approximating the sensor data of an autonomous navigation system installed on the Russian segment of the International Space Station based on application of a mathematical model of the orbital motion of a spacecraft, where aerodynamic drag forces are calculated using the calculation of the mid-section section using a geometric model of the outer surface. This approach was used to analyze these intervals up to ten days of flight of the International Space Station in January and June 2018. The paper presents the results of mathematical modeling using the described mathematical model and a standard mathematical model using a ballistic coefficient. The proposed mathematical model shows significantly better approximation indices.