VLF ionospheric emission monitored on the Equator

Ionospheric electromagnetic phenomena were recorded by the VLF instrument built at the Quito Astronomical Observatory (latitude 0°,12',57 " S; longitude 78°,29',56" W). The observations were made with an electric antenna in the frequency range 0 Hz - 100 kHz. The signal processing is carries out using a computer audio card, so the instrument sensitivity depends on the audio card electronic features. The software Spectrum lab is used for data processing and visualization. Characteristics of the emissions are presented based on the study of the signal phase and amplitude variations corresponding to distinct types of electromagnetic disturbances.