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Pregled bibliografske jedinice broj: 525076

Differences in heliographic positions and rotation velocities of sunspot groups from various observatories

Poljančić, Ivana; Brajša, Roman; Hržina, Damir; Wöhl, Hubertus; Hanslmeier, Arnold; Pötzi, Werner; Baranyi, Tunde; Özgüç, Atila; Singh, Jagdev; Ruždjak, Vladimir
Differences in heliographic positions and rotation velocities of sunspot groups from various observatories // Xth Hvar Astrophysical Colloquium "The Active Sun" / Ruždjak, Vladimir ; Hanslmeier, Arnold ; Ruždjak, Domagoj (ur.).
Zagreb: Geodetski fakultet Sveučilišta u Zagrebu, 2011. str. 59-70 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)

CROSBI ID: 525076 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Differences in heliographic positions and rotation velocities of sunspot groups from various observatories

Autori
Poljančić, Ivana ; Brajša, Roman ; Hržina, Damir ; Wöhl, Hubertus ; Hanslmeier, Arnold ; Pötzi, Werner ; Baranyi, Tunde ; Özgüç, Atila ; Singh, Jagdev ; Ruždjak, Vladimir

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Xth Hvar Astrophysical Colloquium "The Active Sun" / Ruždjak, Vladimir ; Hanslmeier, Arnold ; Ruždjak, Domagoj - Zagreb : Geodetski fakultet Sveučilišta u Zagrebu, 2011, 59-70

Skup
Xth Hvar Astrophysical Colloquium "The Active Sun"

Mjesto i datum
Hvar, Hrvatska, 06.09.2010. - 10.09.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
heliographic coordinates; heliographic longitude; heliographic latitude; angular velocity; data set

Sažetak
Measured positions of sunspot groups that differ in format, precision and observing procedure are collected from various data sets: GPR (Greenwich Photoheliographic Results), SOON/USAF/NOAA (Solar Optical Observing Network/United States Air Force/National Oceanic and Atmospheric Administration), as well as from the Kodaikanal and Debrecen observatories. Kanzelhöhe and Kandilli Observatory currently provide the digitized sunspot drawings, from which the positions of selected sunspot groups are determined with a special software Sungrabber. The rotation velocities are calculated from the position data. The aim of this work is to compare and to check the precision of the mentioned data sets using the Kanzelhöhe Observatory data set as the reference basis of sunspot position measurements. The selected groups (about 40% consist of single sunspots Zürich types H and J) are from the years 1972 and 1993 belonging to similar declining phases of two solar activity cycles. The occurrence of some systematic differences of the sunspot group positions and rotation velocities suggests the need for a more detailed analysis of the data accumulation procedures.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA

Projekti:
009-0091361-2825
007-0000000-1364 - Fizikalni procesi u atmosferama Sunca i zvijezda

Ustanove:
Geodetski fakultet, Zagreb,
Sveučilište u Rijeci - Odjel za fiziku

Profili:

Avatar Url Roman Brajša (autor)

Avatar Url Vladimir Ruždjak (autor)

Avatar Url Ivana Poljančić Beljan (autor)

Citiraj ovu publikaciju:

Poljančić, Ivana; Brajša, Roman; Hržina, Damir; Wöhl, Hubertus; Hanslmeier, Arnold; Pötzi, Werner; Baranyi, Tunde; Özgüç, Atila; Singh, Jagdev; Ruždjak, Vladimir
Differences in heliographic positions and rotation velocities of sunspot groups from various observatories // Xth Hvar Astrophysical Colloquium "The Active Sun" / Ruždjak, Vladimir ; Hanslmeier, Arnold ; Ruždjak, Domagoj (ur.).
Zagreb: Geodetski fakultet Sveučilišta u Zagrebu, 2011. str. 59-70 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
Poljančić, I., Brajša, R., Hržina, D., Wöhl, H., Hanslmeier, A., Pötzi, W., Baranyi, T., Özgüç, A., Singh, J. & Ruždjak, V. (2011) Differences in heliographic positions and rotation velocities of sunspot groups from various observatories. U: Ruždjak, V., Hanslmeier, A. & Ruždjak, D. (ur.)Xth Hvar Astrophysical Colloquium "The Active Sun".
@article{article, author = {Poljan\v{c}i\'{c}, Ivana and Braj\v{s}a, Roman and Hr\v{z}ina, Damir and W\"{o}hl, Hubertus and Hanslmeier, Arnold and P\"{o}tzi, Werner and Baranyi, Tunde and \"{O}zg\"{u}\c{c}, Atila and Singh, Jagdev and Ru\v{z}djak, Vladimir}, year = {2011}, pages = {59-70}, keywords = {heliographic coordinates, heliographic longitude, heliographic latitude, angular velocity, data set}, title = {Differences in heliographic positions and rotation velocities of sunspot groups from various observatories}, keyword = {heliographic coordinates, heliographic longitude, heliographic latitude, angular velocity, data set}, publisher = {Geodetski fakultet Sveu\v{c}ili\v{s}ta u Zagrebu}, publisherplace = {Hvar, Hrvatska} }
@article{article, author = {Poljan\v{c}i\'{c}, Ivana and Braj\v{s}a, Roman and Hr\v{z}ina, Damir and W\"{o}hl, Hubertus and Hanslmeier, Arnold and P\"{o}tzi, Werner and Baranyi, Tunde and \"{O}zg\"{u}\c{c}, Atila and Singh, Jagdev and Ru\v{z}djak, Vladimir}, year = {2011}, pages = {59-70}, keywords = {heliographic coordinates, heliographic longitude, heliographic latitude, angular velocity, data set}, title = {Differences in heliographic positions and rotation velocities of sunspot groups from various observatories}, keyword = {heliographic coordinates, heliographic longitude, heliographic latitude, angular velocity, data set}, publisher = {Geodetski fakultet Sveu\v{c}ili\v{s}ta u Zagrebu}, publisherplace = {Hvar, Hrvatska} }

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