Research on the Arithmetic for Space Debris Long-Term Orbit Propagation in LEO

Space debris Long-Term orbit propagation is one of the main problems for the space debris environment engineering model. This paper provides arithmetic for the space debris Long-Term orbit propagation in LEO. The arithmetic regards the atmosphere drag as the main perturbation, provides an average method to calculate the effect for the atmosphere drag; then import variable step in order to reduce the amount of calculation; at last validate the correctness of the algorithm by comparing the results between this algorithm and STK software.