摘要：We have developed algorithms for conducting a seasonal statistical study of the occurrence of plasma irregularities in the Peruvian sector as a function of height and local time, covering two years of data (2007 and 2008) close to the solar minimum.This study was performed based on radar measurements carried out at the Jicamarca Radio Observatory (JRO), which is located in Lima–Peru (11.57°S, 76.52°W, dip: 2°N), under the magnetic equator.The statistical analysis runs over daily Range Time Intensity (RTI) maps obtained with the radar operating in the Jicamarca Unattended Long-term Investigations of the Ionosphere and Atmosphere (JULIA) mode.Our results revealed relevant features of the diurnal variation of the plasma irregularities embedded in the equatorial electrojet, such as: a more often occurring presence of the 3-m irregularities during equinox, and a descent of the scattering profile in the morning hours, followed by its ascent in the afternoon. Key words Equatorial aeronomy equatorial electrojet plasma irregularities coherent radar observation.
