FMF, Physical, Astronomical and Meteorological Library, Ljubljana (FMFFIZ)
13.
Monitor za spremljanje nenadnih ionosferskih motenj [Elektronski vir]
Vogrinčič, Rok, astronom
Nenadne ionosferske motnje (SID) so izjemno močne gostote ionizacije v D sloju Zemljine ionosfere, ki jih povzročajo izbruhi na Soncu. Ko se izbruh na Soncu zgodi, sunek močnega ultravijoličnega in ...rentgenskega sevanja zadane dnevno stran Zemlje. Visoko-energijsko sevanje absorbirajo delci v atmosferi, ki preko procesa foto ionizacije postanejo vzbujeni. Najnižjim slojem obsevane ionosfere (D in E sloj) se gostota elektronov nemudoma poveča. Ionosferske motnje ojačajo širjenje valov zelo nizkih frekvenc (VLF). S SID monitorjem, ki se nahaja na astronomskem geofizikalnem observatoriju Golovec v Ljubljani, lahko detektiramo izbruhe na Soncu tako, da spremljamo moč radijskega signala oddaljenega VLF oddajnika, v odvisnosti od časa. Izmerjena motnja (SID) pove, ali je zares prišlo do Sončevega izbruha.
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