The generation power of an ensemble of point-like stationary sources of atmospheric pollution is determined based on pollutants concentration measured at a series of control points. The problem is stated, the corresponding differential equations are derived, and algorithms and difference schemes for their numerical solution are discussed. Test computations for a linear source have demonstrated a close agreement with the initial data for both homogeneous and inhomogeneous surfaces. The proposed approach was also applied to analysis of field experiments conducted with the help of an agricultural aircraft used as a linear source. The experiment imitated a combating against agricultural pests. The calculated coordinates and generation power of the source are compared with the actual values.