In this work we present an analysis on the correction efficiency of atmospheric effects on cosmic ray São Martinho da Serra's muon telescope and Newark's neutron monitor data. We use a Multitaper spectral analysis of cosmic rays time series to show the main periodicities present in the corrected and uncorrected data for the atmospheric effects. This kind of correction is very important when intends to study cosmic rays variations of extra-terrestrial origin.
multitaper spectral analysis; cosmic rays; atmospheric effects; pressure and temperature correction
