Improving the spatial resolution by effective subtraction technique at   Irkutsk incoherent scatter radar: the theory and experiment
  We describe a sounding technique that allows us to improve spatial resolution of Irkutsk Incoherent Scatter Radar without loosing spectral resolution. The technique is based on transmitting of rectangle pulses of different duration in various sounding runs and subtracting correlation matrixes. Theoretically and experimentally we have shown, that subtraction of the mean-square parameters of the scattered signal for different kinds of the sounding signal one from another allows us to solve the problem within the framework of quasi-static ionospheric parameters approximation. 
Oleg I.Berngardt, Dmitry S.Kushnarev
physics.space-ph physics.ao-ph physics.geo-ph physics.plasm-ph