ANALISIS PERIODISITAS INTENSITAS RADIASI SINAR-X MATAHARI DAN PARAMETER LAPISAN E IONOSFER

The parameter condition of ionospheric E layer is influenced by radiation of solar X-ray. The parameter of ionospheric E layer is indicated by minimum frequency (fmin), critical frequency of ionospheric E layer (foE) and virtual height of ionospheric E layer (h E). This paper discusses correlation between intensity radiation of solar X-ray (Soft X-ray) with parameter of ionospheric E layer. By analyzing data of ionospheric parameter over Biak (1.11 degree LS; 136.07 degree BT) and Soft X-ray during January to June 1993, it is obtained the between Soft X-ray and minimum frequency of ionospheric layer.