Modification of control algorithm of a spaceship with solar sail on low-latitude near-circular orbit

The problem of algorithm development of the flat solar sail orientation control is considered in the paper. It is set on the spaceship in order to see fulfilled its long-term movements on low-latitude near-circular orbit. The change of sun rays direction, caused by the Sun ecliptic movements, is taken into consideration in the algorithm. Algorithm application can decrease the probability of spaceship with solar sail damage by space debris.