We propose an experiment, a data processing procedure, and a method to recover the electric fields and neutral winds, which are the driving forces for field-aligned irregularity (FAI) generation, from the range-time distribution of line-of-sight Doppler velocities during type 2 backscatter events in the ionospheric E¿region. In doing so we proceed from the fact that ionospheric parameters, specifically the collisional frequencies, change noticeably over the radar height resolution. The proposed technique is based on our knowledge of the mechanisms for FAI generation, the models of the ionospheric parameters and the morphology of the observed velocities. We illustrate our method with a case study for the MU radar on the night of 25 July 2002. The method proposed does not require any additional funding and may be used at sites where the coherent scatter radar has a height resolution which is one half of the minimum desired resolution of the energy sources: neutral winds and electric fields.