em Física e Astronomia Programa de Doutorado e Mestrado Inuence of tides and planetary Dr. Michael Pezzopane Istituto Nazionale di Geosica e Vulcanologia (INGV), Rome, Italy 3947-1121 www.univap.br Universidade do Vale do Paraíba Informações: AMKT waves on sporadic E layer ABSTRAC Tthis paper describes the inuence that tides and planetary waves have on sporadic E (Es) layer dynamics. The study is based on ionograms recorded during the summertime of 2013, by the Advanced Ionospheric Sounder by Istituto Nazionale di Geosica e Vulcanologia (AIS-INGV) ionosondes installed at Rome (41.8°N, 12.5°E) and Gibilmanna (37.9°N, 14.0°E), Italy. We applied the height-time-intensity (HTI) methodology proposed by Haldoupis et al. (2006) to deeply investigate how tides control the Es dynamics. An example of application of the HTI method by considering ionograms recorded at Sao Jose dos Campos will be also shown. Moreover, through the application of the wavelet analysis it was also found that the tidal oscillations imprinted in Es characteristics are affected by a strong amplitude modulation with periods of several days. This amplitude modulation is a proof that Es layers are indirectly affected by planetary waves through their nonlinear interaction with tides at lower altitudes; this nonlinear interaction produces the presence of secondary waves with frequencies that are the sum and difference of the primary waves frequencies involved in the interaction as proposed by Teitelbaum and Vial (1991). This work adds to those that were already done by Haldoupis et al. (2004, 2006), and conrms that ionosonde data, especially those registered in summertime, can be used as a powerful tool for studying tidal and planetary waves properties, as well as their climatology, in the mesosphere-low- termosphere region.