Variation Analysis of Atmospheric Density at 600km

Taking a LEO satellite on orbit for nearly 16 years as an example, based on the discussion of the long-term drift of satellite orbit elements, we focused on the change of satellite orbit height, and established the correlation model of atmospheric density and orbital attenuation rate according to the influence of space environment on the atmospheric damping of LEO satellite orbit. The correlation coefficient between F10.7 parameters and atmospheric density is analyzed by the model. Finally, the data are tested by real orbit data. Validated with orbit data, the results have shown that at the height of 600km, semi major axis decrease is obviously modulated by solar activities with degradation rate of -0.12m•d-1 in high solar activity and - 11.08m•d-1 in low solar activity and -2.29m•d-1 in average. Covering three orders of magnitude, atmospheric density is ranging from 1.32×10-15 kg•m-3 to 3.32×10-13 kg•m-3 with an average of 6.85×10-14kg•m-3. F10.7 parameter is strongly related to atmospheric density with a correlation coefficient that is less than -0.85.