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In this study we will consider a method for evaluating meteoroid parameters from observational data, and some of its applications [Gritsevich, M.I. Determination of parameters of meteor bodies based on flight observational data // Advances in Space Research, 2009, 44(3), 323-334]. The study takes an approach that models the fireballs’ mass and properties based on the rate of body deceleration in the atmosphere as opposed to the luminosity. An analytical model of the atmospheric entry is calculated using published data of observations, by selecting parameters describing drag and ablation of meteors and bolides along the luminous segment of the trajectory. One of the specialties of the model is the possibility of considering a change of body shape during its motion in the atmosphere. The correct mathematical modeling of meteor events is necessary for further estimates of the key parameters of the meteoroids, including deceleration, the extra-atmospheric mass, the terminal mass, the ablation coefficient, the effective enthalpy of evaporation of entering bodies, the temperature, etc. With this information, one can use models for the dust influx onto Earth to estimate the number of meteors visible from a camera with a given sensitivity.