Estimation of the Apparent Source Size of Solar Radio Emissions Using SVD: An Application to Type III Radio Bursts at Long Wavelengths Observed by STEREO and Wind

0357590 - ÚFA 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Krupař, Vratislav - Santolík, Ondřej - Cecconi, B. - Maksimovic, M.
Estimation of the Apparent Source Size of Solar Radio Emissions Using SVD: An Application to Type III Radio Bursts at Long Wavelengths Observed by STEREO and Wind.
WDS’10 Proceedings of Contributed Papers: Part II – Physics of Plasmas and Ionized Media. Prague: MATFYZPRESS, 2010 - (Šafránková, J.; Pavlů, J.), s. 121-127. ISBN 978-80-7378-140-8.
[Week of Doctoral Students 2010. Annual Student Conference /19./. Prague (CZ), 01.06.2010-04.06.2010]
Grant CEP: GA MŠMT ME09107; GA AV ČR IAA301120601
Výzkumný záměr: CEZ:AV0Z30420517
Klíčová slova: Solar Radio * SVD * Wavelengths * STEREO
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech

Type III radio bursts are intense solar radio emissions. They are frequently observed by the S/Waves instruments on-board the STEREO spacecraft. We describe a wave propagation analysis using the Singular Value Decomposition (SVD) which can be directly applied to spectral matrices measured by the High Frequency Receiver (HFR; a part of the S/Waves experiment). We have found an empirical relation between the decomposed spectral matrices and apparent source sizes for waves with a low degree of polarization. We present a joint observation of a type III radio burst by the STEREO and Wind spacecraft during small separation distances. We obtain consistent results for the apparent source size and k-vector direction using different analysis method for the measurements of the STEREO and Wind spacecraft. We demonstrate that SVD can be an effective tool for the wave analysis of radio emissions with very extended sources.
Trvalý link: http://hdl.handle.net/11104/0195832