Mgbasa na-enweghị isi
Incoherent scattering bụ ụdị ihe gbásárá na physics. A na-ejikarị okwu ahụ eme ihe mgbè ọ na-ezo aka na mgbasa nké ebili mmiri electromagnetic (na-abụkarị ìhè ma ọ bụ redio) site na mgbanwe mberede na gas nkè ụmụ irighiri ihe (ọtụtụ mgbè electrons).
A maara ngwa a na-eji eme ihe nkè ọma dị ka incoherent scatter radar theory, usoro dabeere n'ala màkà ịmụ ionosphere nke ụwa nke Prọfesọ William E. Gordon bu ụzọ chepụta n'afọ 1958.[1] Igwe radar na-agbasa electrons na plasma ionospheric na-emepụta nloghachi na-enweghị isi. Mgbè a na-ebufe ebili mmiri electromagnetic site na ikuku, nke ọ bụla n'ime electrons dị na plasma ionospheric na-arụ ọrụ dị ka antenna nke ebili mmiri na-abata kpaliri, a na-enwetaghachi ebili mmiri ahụ site na electron. Ébé ọ bụ na electrons niile na-agagharị na ọsọ dịgasị ichè ichè n'ihi ionospheric dynamics na random thermal motion, ngosipụta sitere na electron ọ bụla na-agbanwe Doppler. Ónyé na-anata n'ala na-anatakwa mgbaàmà nké mejupụtara ntinye nke ebili mmiri na-enwetaghachi site na electrons niile nọ n'ụzọ nke ebili ọkụ na-abata. Ebe ọ bụ na ion ndị nwere ụgwọ dị mma na ionosphere bụ usoro nke oke buru ibu, ha anaghị enwe obi ụtọ site na ebili mmiri electromagnetic na-abata n'ụzọ electrons dị, yabụ ha anaghị emegharị mgbaàmà ahụ. Otú ọ dị, electrons na-anọkarị nso na ion ndị nwere ụgwọ dị mmá. N'ihi ya, a na-agbanwe ọrụ nkesa nke electrons ionospheric site na ions dị nwayọ na nke buru ibu karịa nke electron density fluctuations metụtara okpomọkụ ion, nkesa oke, na mmegharị. Ihe mgbaàmà na-agbasa agbasa na-enye ohere ịlele njupụta nke electron, okpomọkụ ion na okpomọkụ electron, ihe mejupụtara ion na ọsọ plasma.
Ụdị ihe ndị a na-ahụ na radar na-agbasa agbasa agbasa
dezieMmetụta nke Electron
dezieỌ bụrụ na e nwèrè ọnụ ọgụgụ dị ukwuu nke electrons dị na ionosphere, mgbè ahụ, a ga-enwe ọtụtụ ebili mmiri electromagnetic nke na-egbukepụ egbukepụ nke na-eru ónyé nata, nke kwekọrọ na ike dị ukwuu nke ụda na ónyé nata. Ébé ọ bụ na a maara oke ike nke otu electron gosipụtara, ónyé nata nwèrè ike iji ike zuru oke a tụrụ iji chọpụta njupụta electron na mpaghara ahọrọ.[2]
Okpomọkụ nke Ion na Electron
dezieÉbé ọ bụ na nke ọ bụla n'ime electrons na ion na-egosipụta mmegharị okpomọkụ na-enweghị isi, ụda a natara agaghị adị na kpọmkwem ugboro ole a na-ebufe ya. Kama nke ahụ, a ga-agụnye mgbaàmà ahụ n'ọtụtụ ọnụọgụ dị nso na ọnụọgụ mbụ, ébé ọ bụ na ọ bụ ntinye nke ọtụtụ ntụgharị Doppler-shifted. Obosara nke ọnụọgụ ahụ kwekọrọ na okpomọkụ nke ionosphere. Okpomọkụ dị elu na-ebute ọsọ okpomọkụ dị ukwuu, nke na-ebubata mgbanwe Doppler buru ibu na nkesa ka ukwuu na ugboro ole a natara. Otú ọ dị, ọ dị mkpa iburu n'uche na omume okpomọkụ dị íchè n'etiti electrons na ion. Ions bụ usoro nke oke buru ibu karị, ha anaghị emekọrịta ihe na okpomọkụ radiated n'otu ụzọ ahụ electrons na-eme. N'ihi ya, okpomọkụ electron na okpomọkụ Ion dị íchè.
Ioni Na-agagharị
dezieỌ bụrụ na plasma Ionospheric na-agagharị n'ozuzu ya, mgbè ahụ, a ga-enwekwa mgbanwe Doppler n'ofe na data natara. Enwèrè ike ịhụ nké a dị ka mgbanwe na ọnụọgụ ọnụọgụ, nké na-ekpughe Ion Drift n'ozuzu ya na Ionosphere.
Ọdịdị Ionospheric
dezieHụkwa
dezie- EISCAT
- Ebe Nlegharị anya Millstone Hill
- Ebe Nledo Arecibo
- Jicamarca Radio Observatory
- Sondrestrom Upper Atmospheric Research Facility
- Poker Flat Research Range
Edensibia
dezie- ↑ Gordon (Nov 1958). "Incoherent Scattering of Radio Waves by Free Electrons with Applications to Space Exploration by Radar". Proceedings of the IRE 46: 1824–1829. DOI:10.1109/JRPROC.1958.286852.
- ↑ Geospace.
Njikọ mpụga
dezie- EISCAT Homepage- banyere EISCats, European Incoherent Scatter
- Millstone Hill Observatory Homepage - banyere Millstone Hill observatory
- Incoherent scatter tutorial E debere Wayback Machine - site na MIT Haystack Observatory website
- Ebe ndị na-agbasa agbasa agbasa - map nke radars na-agbasasị agbasa agbasasị agbasasị nke ụwa
- AMISR - Advanced Modular Incoherent Scatter Radar