Neutral densities and winds are critical parameters for understanding the physics and dynamics of the mesosphere, the thermosphere and the ionosphere systems. The continuous measurements available for these parameters are largely obtained from the ground (geographically fixed locations) and usually with limited altitude coverage. As the altitude rises in relation to sea level, the atmospheric density decreases exponentially. The rate of variation of this parameter depends on the latitude, longitude and season of the year, as well as on the solar and magnetic activity. Obtaining information on atmospheric density at determined altitude levels enhances the understanding of mesosphere, thermosphere and ionosphere coupling systems. In order to estimate the atmosphere density in regions of interest, the analysis of the drag effect of the atmosphere on a spacecraft is investigated. With the aim of understanding the dissipative effect of the drag forces, a scenery is created. When the spacecraft is in operation the position, velocity and acceleration are well determined. So, it can be traced and its location determined in any interval of time. Based on information about the spacecraft states, one can infer about the behavior of the atmospheric density. The proposal of this paper is to develop a methodology using a priori knowledge of the spacecraft states in order to provide a wider horizontal sample of the atmospheric densities.