Manik, Timbul, Adi Purwono, Musthofa Lathif, Mario Batubara, and Mamoru Yamamoto. 2019. “Resolution Enhanced of GRBR Observation-Based Ionospheric Tomography in Indonesia”. Proceeding International Conference on Science and Engineering 2 (March):259-65. https://doi.org/10.14421/icse.v2.99.