An ionogram is a graph that shows the distance that a vertically transmitted wave, of a given frequency, travels before returning to the earth. The ionogram is shaped by making a trace of this distance, which is called virtual height, against the frequency of the transmitted wave. Along with the echoes ...

En el Radio Observatorio de Jicamarca (ROJ) se ha desarrollado un sistema receptor digital de señales de radiofrecuencia provenientes de satélites de baja órbita. Este receptor terrestre calcula la variación del Contenido Total de Electrones (rTEC, del inglés relative Total Electron Content) en la ...

This thesis is concerned with the theory of incoherent scattering by a plasma, i. e., with the statistical description of the electromagnetic waves scattered by the termal electron density fluctuations in a plasma which has been illuminated by anelectromagnetic wave of certain frequency. We have treated ...