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of 48
pro vyhledávání: '"L. Altas"'
Autor:
L. Altas, T. Atac, A. Özgüc, Z. Zbyszynski, A. Rokicki, I. Stanislawska, Y. G. Yigit, S. A. Baykal, Y. Tulunay, O. Barlas
Publikováno v:
Annals of Geophysics, Vol 39, Iss 4 (1996)
During the COST 238: PRIME project there was a campaign of 15-min intervals of the f0F2 soundings at Kandilli, Rome, Sofia, Poitiers and Lannion. The campaign took place for one month in June 1993. The spectral analysis of the data using a Fast Fouri
Externí odkaz:
https://doaj.org/article/fbe9fecf95034ab28ec460ab2d262772
Akademický článek
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Akademický článek
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Akademický článek
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Autor:
L. Altas, P. Zlobec, Atila Özgüç, Roman Brajša, Henry Aurass, Bojan Vršnak, A. Schroll, V. Ruždjak
Publikováno v:
Solar Physics. 194:285-303
A sample of 47 importance ≥ 1 flares whose Hα emission occurred or protruded over umbrae of major sunspots (so called Z-flares) was studied to investigate characteristics of the associated dm – m radio, microwave and soft X-ray emission as the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdc410999de061af75763cb4bf2fbfde
https://doi.org/10.1023/a:1005297805803
https://doi.org/10.1023/a:1005297805803
Publikováno v:
Solar Physics. 178:267-270
Sunspot observations performed at Kandilli Observatory and the Earthquake Research Institute (KOERI) in cycle 21 (between January 1976 and December 1986) were investigated to obtain the reduction factors. The dependence of the reduction factors on th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::151a6fdbac587246ed1f8cd44696af40
https://doi.org/10.1023/a:1005099106918
https://doi.org/10.1023/a:1005099106918
Autor:
A. Duzgelen, L. Altas
Publikováno v:
Solar Physics. 171:145-153
The 1N/M6.1 limb-flare-associated surge-spike phenomenon of 24 September, 1991 is investigated using Hα filtergrams taken at Kandilli Observatory. The kinematics and the morphological features of the moving plasma are discussed. Radio and soft X-ray
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ff1d78b2391b45217a8315d08049735
https://doi.org/10.1023/a:1004967230985
https://doi.org/10.1023/a:1004967230985
Autor:
Atila Özgüç, L. Altas
Publikováno v:
Solar Physics. 163:327-333
For solar cycles 20 and 21, the longitudinal distribution of the D, G, and H-type solar flares which are related to the final phases of active region evolution, have been analysed for the northern and the southern hemispheres separately. One active z
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66f1c15dc07d76c9c32d0a32dc6dd597
https://doi.org/10.1007/bf00148005
https://doi.org/10.1007/bf00148005
Autor:
L. Altas
Publikováno v:
Solar Physics. 151:169-176
The distribution of spotless flares (SFs) covering the time interval between 1947 and 1990 was investigated. The (11 – 20°) latitude zone was found as the most prolific region for the occurrence of SFs. The longitudinal distribution of SFs occurre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3aa74074ca4d2ee3ae38538a0f50e145
https://doi.org/10.1007/bf00654089
https://doi.org/10.1007/bf00654089
Autor:
L. Altas, Oryal Barlas
Publikováno v:
Astrophysics and Space Science. 197:337-341
The mean durations of spotless Hα flares, SFs were calculated as a function of their importance. Totally 3569 SFs chosen from theQuarterly Bulletin (QB) andSolar Geophysical Data (SGD) were used in the present analysis for the period 1947–1990. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b76a5ebf2988751416a2f03898641396
https://doi.org/10.1007/bf00645745
https://doi.org/10.1007/bf00645745