Unit:
Κατεύθυνση Αστροφυσική, Αστρονομία και Μηχανική (ΒΑΣΙΚΗ ΦΥΣΙΚΗ)Library of the School of Science
Author:
Dakanalis Ioannis
Supervisors info:
Κοσμάς Γαζέας, Λέκτορας, Τμήμα Φυσικής, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)
Γεωργία Τσιροπούλα, Διευθύντρια Ερευνών, Ινστιτούτο Αστρονομίας, Αστροφυσικής, Διαστημικών Εφαρμογών και Τηλεπισκόπησης (ΙΑΑΔΕΤ)
Παναγιώτα Πρέκα-Παπαδήμα, Επίκουρη Καθηγήτρια, Τμήμα Φυσικής, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)
Original Title:
Αναβάθμιση της λειτουργίας του ηλιακού τηλεσκοπίου του Εθνικού Αστεροσκοπείου Αθηνών, λήψη ηλιακών παρατηρήσεων και ενσωμάτωσή τους στον HELIOSERVER. Μελέτη της απόκρισης της Ιονόσφαιρας σε εκρηκτικά ηλιακά φαινόμενα
Translated title:
Operational upgrade of NOA's solar telescope, solar observations recording and their integration to the HELIOSERVER. Study of the ionοspheric response in solar eruptive phenomena
Summary:
This thesis presents the general upgrade and the observational products from the solar telescope of the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS) of the National Observatory of Athens (NOA), as well as, results from our research regarding the response of the Earth’ s ionosphere above Europe, due to the solar eruptive phenomena of September 2017. Following the need for ground-based synoptic observations of the Sun, we provide Halpha-line observations of the solar disk with emphasis on the chromospheric phenomena, presenting full-disk and close-up (in regions of interest) observations. The images are taken with a dedicated 10mm aperture solar telescope, equipped with an internal etalon of bandpass < 0.7 A, along with a CCD camera of 1600 x 1200 resolution and 4 x 4 μm pixel dimension. The resulted near real-time solar observations are available in a web-based server (HELIOSERVER) developed in the IAASARS, which also includes complementary information from space solar observatories such as SDO/NASA and SWPC/NOAA’ s, ACE and GOES satellites, and, also, provides real-time monitor of ionospheric conditions and solar energetic particle events (SEP) forecasting tools. The impact of solar eruptive phenomena in the ionosphere above Europe, is presented for a case study concerning the events of September 2017 through the behavior of several important ionospheric parameters such as foF2, MUFD, fmin and TEC. Data from the European Digital Upper Atmosphere Server (DIAS) were used for the analysis and study of that impact, as well as, time series of these critical parameters from other digisondes around the globe. Ground-based monitoring of the solar activity along with its effect in the ionospheric conditions serves the ever important need for synoptic observations, especially in the territory of Europe. This work is funded by the KRIPIS/PROTREAS project.
Main subject category:
Science
Keywords:
Solar telescope, synoptic observations, solar eruptive events, ionosphere
