Cahyadi, M. N. ., Rahadyan, A. N. . and Muslim, B. . (2019) “ANALISIS NILAI TOTAL ELECTRON CONTENT (TEC) NEAR REAL TIME MENGGUNAKAN DATA GPS DUA FREKUENSI (STUDI KASUS: SURABAYA)”, GEOID, 14(2), pp. 56–60. doi: 10.12962/geoid.v14i2.1604.