000003978 001__ 3978
000003978 005__ 20190129105231.0
000003978 037__ $$aSEMIN-2019-0009
000003978 100__ $$aWauters, Laurence
000003978 245__ $$aTracking the evolution of the predominant solar periodicities for PROBA2/LYRA data and other long-term solar time series
000003978 260__ $$c2018
000003978 269__ $$c2018-10-03
000003978 520__ $$aThe periodograms of the PROBA2/LYRA data show predominant periodicities comparable to the ones observed by other solar time series for the same time range. These periodicities have been found to slightly vary over time. Tracking their evolution on a long-term basis aims at identifying which periodicities are related to each other and at determining which physical processes are at their origin. A study has been made on sunspot area, for which several solar cycles of data exist and for which the periodicities are close to the ones found in LYRA (for the same time range). We used framed Lomb-Scargle periodograms to extract the periodicities and check their evolution. Several significant periodicities behave similarly and seem to be harmonically related. 
000003978 594__ $$aNO
000003978 773__ $$tROB
000003978 8560_ $$flaurence.wauters@observatoire.be
000003978 980__ $$aSEMIN