Some relationships between solar X-ray bursts and SPA's produced on VLF propagation in the lower ionosphere

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dc.contributor.authorKaufmann P.
dc.contributor.authorPaes de Barros M.H.
dc.date.accessioned2024-03-13T01:48:30Z
dc.date.available2024-03-13T01:48:30Z
dc.date.issued1969
dc.description.abstractThis paper discusses SPA's measured at long VLF propagation paths in the lower ionosphere and their association with solar X-ray bursts observed by USNRL satellites in the 0-3 Å, 0-8 Å and 8-20 Å bands. Excellent correlations were found between the SPA importances (in degrees per Mm) and the logarithm of the X-ray burst peak intensities. A hardening of the X-ray burst spectra is evident for increasing importance of SPA's; the threshold energy required for the occurrence of such anomalies was estimated, it is 4.3×10-5 ergs cm-2 sec-1 in the main ionizing band of 0-3 Å. It was also possible to derive the effective recombination coefficient at the normal D-region height of 70 km, this being αr≈6×10-6 cm3 sec-1; furthermore ion production rates were estimated during SPA's at heights below the reference level. © 1969 D. Reidel Publishing Company.
dc.description.firstpage478
dc.description.issuenumber2
dc.description.lastpage486
dc.description.volume9
dc.identifier.doi10.1007/BF02391673
dc.identifier.issn0038-0938
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/38121
dc.relation.ispartofSolar Physics
dc.rightsAcesso Restrito
dc.titleSome relationships between solar X-ray bursts and SPA's produced on VLF propagation in the lower ionosphere
dc.typeArtigo
local.scopus.citations17
local.scopus.eid2-s2.0-33646507777
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33646507777&origin=inward
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