Design a radio receiver for solar activity observation in VLF band. Al-Khwarizmi Engineering Journal, [S. l.], v. 19, n. 1, p. 57–69, 2023. DOI: 10.22153/kej.2023.11.002. Disponível em: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/793.. Acesso em: 24 nov. 2024.