Resta-López, J. Hunt, J.R. Veglia, B. Welsch, C.P. JACoW Geneva, Switzerland Precise emittance measurements are essential to guarantee optimum beam control and performance in all kind of accelerator machines. Amongst them, ultra-low energy antiproton and ion facilities, where beam cooling is essential, are not an exception. In these machines, the emittance reconstruction techniques have to face several challenges, e.g. asymmetric beams, long beam profile tails, diffusion and space charge effects. In addition, likely in a strongly cooled beam there will appear a high correlation between momentum offset and transverse emittance. In this contribution, we investigate effective reconstruction algorithms based in scraping techniques in presence of the above effects. Simulation results are presented for the case of the Extra Low ENergy Antiproton storage ring (ELENA), which is currently being commissioned at CERN.