<p>We study the possibility of using double spatial field processing based on the double weighted Fourier transform (DWFT) method to increase the resolution of satellite diagnostics of an inhomogeneous ionospheric plasma. The case of synthesizing a line of sources of the probing signal by a low-orbiting satellite of the “Ionosphere-M” type is considered. As a model of the ionosphere, an approximation is used in the form of a background medium represented by a simple Chapman layer, with the addition of horizontally moving local plasma irregularities having dielectric permittivity variations in the form of Gaussian functions. Computer calculations of the phase of the field of a wave that has passed through an inhomogeneous medium showed that for the chosen parameters of the problem, the use of double spatial field processing based on the DWFT method makes it possible to overcome the Fresnel resolution limit for diagnosing small-scale ionospheric irregularities moving with horizontal drift velocities less than 200 and 380 m/s for probing-signal frequencies of 150 and 400 MHz, respectively.</p>