Monteiro , A. de A. ., Muella , M. T. A. H. ., & Vargas , F. . (2020). Ionosondes: a study on the use of electromagnetic wave propagation as a technique to observe the ionized layer of the earth’s atmosphere . Physicae Proceedings, 1(1), 11–12. Recuperado de https://econtents.bc.unicamp.br/eventos/index.php/phyproceedings/article/view/3218