Revised version of Greenwich Photoheliographic Results (GPR) sunspot database

converted to DPD format and completed with solar drawings of Ógyalla, Kalocsa and Mount Wilson observatories
published by Baranyi, T. and Ludmány, A.

The Greenwich Royal Observatory compiled the Greenwich Photoheliographic Results (GPR) sunspot catalogue between 1874 and 1976. In 1976, the Debrecen Heliophysical Observatory took over this responsibility and now the Debrecen Photoheliographic Data (DPD) covers the years after 1973. The present version of GPR database is created from the electronic version of GPR for sunspot groups published at NOAA National Geophysical Data Center (NGDC) and the UK Solar System Data Centre (UKSSDC) after some data revision. The presentation of data is completed with the solar drawings of Hungarian Historical Solar Drawings (Konkoly Observatory at Ógyalla, Haynald Observatory at Kalocsa) and Mount Wilson Observatory.
For further information on "The Greenwich Photo-heliographic Results (1874 – 1976)" and its revision please visit our site here and our tables of modifications.

FTP access to the revised txt version of data can be found here.

Rövid ismertetés az MTA CSFK CSI debreceni Napfizikai Obszervatóriuma által publikált napfolt-adatokról

	1872	1873	1874	1875	1876	1877	1878	1879	1880
1881	1882	1883	1884	1885	1886	1887	1888	1889	1890
1891	1892	1893	1894	1895	1896	1897	1898	1899	1900
1901	1902	1903	1904	1905	1906	1907	1908	1909	1910
1911	1912	1913	1914	1915	1916	1917	1918	1919	1920
1921	1922	1923	1924	1925	1926	1927	1928	1929	1930
1931	1932	1933	1934	1935	1936	1937	1938	1939	1940
1941	1942	1943	1944	1945	1946	1947	1948	1949	1950
1951	1952	1953	1954	1955	1956	1957	1958	1959	1960
1961	1962	1963	1964	1965	1966	1967	1968	1969	1970
1971	1972	1973	1974	1975	1976	Continuation at the DPD catalogue

DATA POLICY: If this graphical presentation of data or HHSD are used in any publications, please refer to this paper:
Baranyi, T., Győri, L., Ludmány, A., On-line Tools for Solar Data Compiled at the Debrecen Observatory and their Extensions with the Greenwich Sunspot Data, Solar Physics, 291, 3081-3102, 2016, DOI: 10.1007/s11207-016-0930-1

ACKNOWLEDGEMENTS

The digitization of the drawings of Haynald Observatory at Kalocsa and the development of this web-presentation have been supported within the project TÁMOP 4.2.2.C-11/1/KONV/2012-0015 ”Föld-rendszer adatok tudományos feldolgozása és az ismeretek társadalmasítása korszerű informatikai eszközök segítségével”.
The revision of GPR data has received funding from the European Community"s Seventh Framework Programme (FP7/2012-2015) under grant agreement No. 284461 (EHEROES, Mar. 2012 - Feb. 2015).
The digitization of the drawings of Konkoly Observatory at Ógyalla has received funding from the European Community"s Seventh Framework Programme (FP7/2007-2013) under grant agreement No. 218816 (SOTERIA, Nov. 2008 - Oct. 2011). The Mt. Wilson 150-Foot Solar Tower is operated by UCLA, with funding from NASA, ONR and NSF, under agreement with the Mt. Wilson Institute.

Contact person: Tünde Baranyi (e-mail:baranyi[at]tigris.unideb.hu); Requests, comments, questions or bug-reporting are welcome.