Analysis of Time-Varying Spatial Characteristics for Atmospheric Density of Earth Edge

The time-varying and spatial characteristics of the atmospheric density of Earth edge are discussed in this paper.Based on physical reasons and results of relative atmospheric density calculated from NRLMSISE-00 and MET-99 atmospheric models,the influence caused by all spatial and temporal factors can be illustrated.The results show that the atmospheric density of Earth edge has obvious time-varying characteristics and the impact of latitude on the atmospheric density is significant,while the impact of longitude is not obvious.The influence of latitude is more obvious in summer and winter than spring and autumn.With the increase of latitude,season influences the atmospheric density of Earth edge stronger,while the local solar time weaker.In comparison,the diurnal fluctuations are more obvious than seasonal fluctuations in the area of lower latitude,while the influence caused by season is stronger in areas of higher latitude.