On-line Tools for Solar Data Compiled at the Debrecen Observatory and Their Extensions with the Greenwich Sunspot Data

2016/06/30 by T. Baranyi, L. Győri, A. Ludmány · 126 citations
Earth and Planetary Sciences · Physics and Astronomy · #Earthquake Detection and Analysis #Greenwich #Homogeneous #Ionosphere and magnetosphere dynamics #Observatory #Solar and Space Plasma Dynamics #Solar observatory #Solar physics #Sunspot #astro-ph.SR

paper · pdf · doi:10.1007/s11207-016-0930-1

published in Solar Physics 291(9-10), 3081-3102 (Springer Science+Business Media) · 25 pages, 11 figures, accepted for publication in Solar Physics

openalex created_date 2016/06/24 · arxiv created 2016/08/05 · openalex publication_date 2016/08/18 · arxiv updated 2016/08/31 · openalex updated_date 2026/08/05

Abstract

The primary task of the Debrecen Heliophysical Observatory (DHO) has been the most detailed, reliable, and precise documentation of the solar photospheric activity since 1958. This long-term effort resulted in various solar catalogs based on ground-based and space-borne observations. A series of sunspot databases and on-line tools were compiled at DHO: the Debrecen Photoheliographic Data (DPD, 1974--), the dataset based on the Michelson Doppler Imager (MDI) of the Solar and Heliospheric Observatory (SOHO) called SOHO/MDI--Debrecen Data (SDD, 1996--2010), and the dataset based on the Helioseismic and Magnetic Imager (HMI) of the Solar Dynamics Observatory (SDO) called SDO/HMI--Debrecen Data (HMIDD, 2010--). User-friendly web-presentations and on-line tools were developed to visualize and search data. As a last step of compilation, the revised version of Greenwich Photoheliographic Results (GPR, 1874--1976) catalog was converted to DPD format, and a homogeneous sunspot database covering more than 140 years was created. The database of images for the GPR era was completed with the full-disc drawings of the Hungarian historical observatories Ógyalla and Kalocsa (1872--1919) and with the polarity drawings of Mount Wilson Observatory. We describe the main characteristics of the available data and on-line tools.

Citations

• Group Sunspot Numbers: A New Solar Activity Reconstruction

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