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Observatory List and IAGA Code
Observatories IAGA Code Data Resolution
Cheltenham CLH HR

Year

 J F M A M J J A S O N D
1901 0 0 0 1 1 1 1 1 1 1 1 1
1902 1 1 1 1 1 1 1 1 1 1 1 1
1903 1 1 1 1 1 1 1 1 1 1 1 1
1904 1 1 1 1 1 1 1 1 1 1 1 1
1905 1 1 1 1 1 1 1 1 1 1 1 1
1906 1 1 1 1 1 1 1 1 1 1 1 1
1907 1 1 1 1 1 1 1 1 1 1 1 1
1908 1 1 1 1 1 1 1 1 1 1 1 1
1909 1 1 1 1 1 1 1 1 1 1 1 1
1910 1 1 1 1 1 1 1 1 1 1 1 1
1911 1 1 1 1 1 1 1 1 1 1 1 1
1912 1 1 1 1 1 1 1 1 1 1 1 1
1913 1 1 1 1 1 1 1 1 1 1 1 1
1914 1 1 1 1 1 1 1 1 1 1 1 1
1915 1 1 1 1 1 1 1 1 1 1 1 1
1916 1 1 1 1 1 1 1 1 1 1 1 1
1917 1 1 1 1 1 1 1 1 1 1 1 1
1918 1 1 1 1 1 1 1 1 1 1 1 1
1919 1 1 1 1 1 1 1 1 1 1 1 1
1920 1 1 1 1 1 1 1 1 1 1 1 1
1921 1 1 1 1 1 1 1 1 1 1 1 1
1922 1 1 1 1 1 1 1 1 1 1 1 1
1923 1 1 1 1 1 1 1 1 1 1 1 1
1924 1 1 1 1 1 1 1 1 1 1 1 1
1925 1 1 1 1 1 1 1 1 1 1 1 1
1926 1 1 1 1 1 1 1 1 1 1 1 1
1927 1 1 1 1 1 1 1 1 1 1 1 1
1928 1 1 1 1 1 1 1 1 1 1 1 1
1929 1 1 1 1 1 1 1 1 1 1 1 1
1930 1 1 1 1 1 1 1 1 1 1 1 1
1931 1 1 1 1 1 1 1 1 1 1 1 1
1932 1 1 1 1 1 1 1 1 1 1 1 1
1933 1 1 1 1 1 1 1 1 1 1 1 1
1934 1 1 1 1 1 1 1 1 1 1 1 1
1935 1 1 1 1 1 1 1 1 1 1 1 1
1936 1 1 1 1 1 1 1 1 1 1 1 1
1937 1 1 1 1 1 1 1 1 1 1 1 1
1938 1 1 1 1 1 1 1 1 1 1 1 1
1939 1 1 1 1 1 1 1 1 1 1 1 1
1940 1 1 1 1 1 1 1 1 1 1 1 1
1941 1 1 1 1 1 1 1 1 1 1 1 1
1942 1 1 1 1 1 1 1 1 1 1 1 1
1943 1 1 1 1 1 1 1 1 1 1 1 1
1944 1 1 1 1 1 1 1 1 1 1 1 1
1945 1 1 1 1 1 1 1 1 1 1 1 1
1946 1 1 1 1 1 1 1 1 1 1 1 1
1947 1 1 1 1 1 1 1 1 1 1 1 1
1948 1 1 1 1 1 1 1 1 1 1 1 1
1949 1 1 1 1 1 1 1 1 1 1 1 1
1950 1 1 1 1 1 1 1 1 1 1 1 1
1951 1 1 1 1 1 1 1 1 1 1 1 1
1952 1 1 1 1 1 1 1 1 1 1 1 1
1953 1 1 1 1 1 1 1 1 1 1 1 1
1954 1 1 1 1 1 1 1 1 1 1 1 1
1955 1 1 1 1 1 1 1 1 1 1 1 1
1956 1 1 1 1 1 1 1 1 1 0 0 0