 This paper uses swarm C accelerometer data to invert the orbital atmospheric density. First, the data are corrected for errors before being compared to the ESA's published results. Additionally, the authors use a geometric model to simulate the satellite's physical shape and develop two models to analyze the effects of light radiation on the accelerometer. They also calculate the atmospheric drag coefficient and compare their results with existing research data. This article was authored by Li Rongyin, Lei Wang, Zhou Aitian, and others.