Based on the Kepler's third law of planetary motion,this paper studies the orbit trajectory of Starlink satellite,analyzes its orbit characteristics,establishes an orbit simulation model,uses the high-order Runge-Kutta method to solve the equation,and uses STK(Satellite Tool Kit)to analyze the coverage situation of Starlink satellite in southeast China and low-latitude areas of China.The simulation results show that the overall coverage capacity is steadily improved with the increase in the number of Starlink satellite launches.The coverage of the first 1 000 satellites is between 54°N and 54°S,and the coverage degree of low-latitude areas in China is lower than that of the mid-latitude areas.The coverage of 2 000 satellites has reached 100%between this range,and the coverage level of 3 000 satellites has increased significantly,and it has extended to the poles,but it has not been able to cover the polar regions.
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