COSMIC RAY RESEARCH UNIT, POTCHEFSTROOM UNIVERSITY, POTCHEFSTROOM IGY NEUTRON MONITOR, POTCHEFSTROOM, SOUTH AFRICA COORDINATES 26 41 S, 27 06 E ALTITUDE 1351 METERS REAL COUNTS 100 TIMES TABULATED VALUES CORRECTED TO 652.4 MM HG CO-EFFICIENT 0.9900 PERCENT/MM HG DATE DAY UT 01 02 03 04 05 06 07 08 09 10 11 12 DAILY MEANS 13 14 15 16 17 18 19 20 21 22 23 24 1 12 1981 335 1931 1937 1941 1936 1940 1943 1928 1933 1944 1954 1945 1946 1945 1964 1963 1949 1962 1957 1948 1967 1940 1953 1955 1940 1946.7 24 2 12 1981 336 1955 1945 1953 1957 1947 1944 1936 1940 1946 1940 1956 1947 1952 1945 1953 1941 1930 1947 1956 1943 1950 1948 1950 1945 1946.9 24 3 12 1981 337 1937 1930 1942 1947 1939 1943 1935 1931 1954 1946 1946 1959 1944 1947 1966 1944 1938 1947 1948 1953 1947 1953 1952 1953 1945.9 24 4 12 1981 338 1948 1957 1963 1948 1945 1956 1948 1929 1947 1940 1962 1963 1970 1948 1967 1949 1960 1958 1962 1961 1957 1947 1955 1951 1953.8 24 5 12 1981 339 1960 1960 1956 1945 1961 1953 1946 1965 1964 1952 1959 1962 1973 1967 1965 1963 1962 1956 1974 1958 1961 1967 1953 1952 1959.8 24 6 12 1981 340 1952 1965 1962 1959 1961 1940 1961 1965 1975 1960 1974 1972 1980 1968 1972 1952 1967 1959 1956 1975 1968 1964 1958 1958 1963.5 24 7 12 1981 341 1955 1969 1955 1960 1947 1959 1959 1957 1960 1958 1947 1962 1963 1962 1954 1946 1948 1968 1946 1962 1958 1946 1955 1935 1955.5 24 8 12 1981 342 1952 1941 1958 1970 1975 1963 1961 1973 1972 1964 1970 1951 1958 1964 1947 1938 1960 1944 1945 1943 1928 1904 1904 1908 1949.7 24 9 12 1981 343 1904 1894 1910 1905 1929 1917 1932 1940 1944 1952 1965 1947 1939 1932 1939 1935 1936 1930 1915 1926 1921 1920 1937 1930 1929.1 24 10 12 1981 344 1929 1929 1913 1918 1910 1936 1952 1947 1942 1958 1969 1967 1952 1950 1949 1944 1943 1923 1927 1924 1923 1926 1932 1931 1937.3 24 11 12 1981 345 1935 1932 1922 1958 1924 1927 1931 1932 1939 1930 1938 1933 1935 1935 1934 1936 1942 1945 1934 1945 1926 1920 1922 1935 1933.8 24 12 12 1981 346 1930 1911 1927 1929 1923 1917 1911 1902 1914 1943 1933 1936 1941 1952 1954 1954 1959 1952 1932 1936 1949 1947 1950 1939 1935.0 24 13 12 1981 347 1952 1962 1954 1945 1954 1953 1951 1964 1965 1949 1943 1967 1958 1966 1963 1958 1967 1960 1935 1956 1932 1947 1949 1950 1954.2 24 14 12 1981 348 1966 1957 1953 1944 1942 1934 1940 1934 1949 1972 1954 1946 1965 1966 1954 1945 1954 1958 1956 1938 1954 1943 1954 1959 1951.5 24 15 12 1981 349 1950 1945 1947 1946 1943 1953 1956 1955 1959 1959 1959 1960 1974 1976 1966 1969 1965 1956 1954 1965 1960 1964 1971 1966 1959.1 24 16 12 1981 350 1965 1958 1957 1961 1955 1958 1948 1954 1955 1966 1964 1963 1977 1966 1985 1960 1968 1969 1969 1980 1987 1982 1971 1968 1966.1 24 17 12 1981 351 1955 1970 1952 1959 1950 1951 1967 1973 1968 1970 1972 1986 1996 1982 1975 1981 1974 1978 1977 1976 1983 1983 1988 2004 1973.8 24 18 12 1981 352 1983 1981 1968 1964 1973 1966 1974 1989 1978 1959 1990 1972 1981 1982 1981 1977 1981 1966 1964 1976 1981 1963 1969 1962 1974.2 24 19 12 1981 353 1957 1965 1973 1964 1980 1974 1985 1986 1983 1980 2004 2012 1978 1992 1986 1992 1978 1984 1984 1974 1991 1987 1979 1979 1982.0 24 20 12 1981 354 1977 1993 1981 1979 1982 1989 1985 1987 1982 2006 1997 1994 2008 1986 1993 1996 1995 1994 1985 2004 1995 1996 1987 2000 1991.3 24 21 12 1981 355 1993 2003 1992 1981 1987 1983 1989 1996 2003 1998 1997 2014 2010 2000 2016 1993 2009 2006 1989 2000 2007 2016 1999 1990 1998.8 24 22 12 1981 356 1998 1987 1998 1992 1985 1980 2001 2002 2002 2005 2005 2007 1998 2002 2013 2005 2014 2008 2016 2014 2002 2003 1993 2000 2001.3 24 23 12 1981 357 1985 1985 1973 2000 1988 2002 2012 2004 2027 2014 2027 2015 2020 1999 2022 2002 2006 1996 2001 1991 1992 1993 1994 2003 2002.1 24 24 12 1981 358 2018 2001 1990 1993 1988 1997 1996 2002 2005 2005 2018 1987 2015 2002 2013 2008 1998 2010 1997 1983 1979 2004 1979 2000 1999.5 24 25 12 1981 359 1980 2009 1996 1992 1993 2000 2000 2002 1990 2013 2003 1996 1993 1999 1986 2004 1983 1992 2001 1993 2005 1989 1999 1987 1996.0 24 26 12 1981 360 1993 1989 1985 1988 1970 1984 1980 1980 1979 2005 1984 1987 1987 1996 1981 1986 1994 1990 1981 1988 1988 1982 1979 1981 1985.7 24 27 12 1981 361 1979 1983 1984 1981 1984 1981 1970 1990 2000 1989 1981 1992 2000 1985 2006 1973 1984 1996 1983 1989 1977 1994 1994 1986 1986.7 24 28 12 1981 362 1973 1999 1987 1968 1984 1972 1980 1975 1988 2010 1983 1986 2001 2001 2006 1986 1995 1996 1986 1998 1987 1999 1978 1996 1988.9 24 29 12 1981 363 1985 1977 1984 1992 1977 1959 1966 1967 1984 2001 2004 1995 2008 2008 1989 1982 1965 1956 1954 1939 1940 1943 1935 1939 1972.9 24 30 12 1981 364 1939 1947 1954 1951 1948 1963 1953 1956 1956 1962 1986 1958 1963 1973 1970 1949 1956 1934 1951 1936 1945 1945 1946 1922 1952.6 24 31 12 1981 365 1923 1942 1944 1920 1950 1927 1932 1938 1941 1942 1948 1947 1943 1929 1942 1927 1923 1919 1932 1914 1919 1920 1926 1938 1932.8 24 MONTHLY MEANS 1960 1962 1960 1960 1959 1959 1961 1963 1968 1971 1974 1972 1975 1972 1975 1966 1968 1966 1963 1965 1963 1963 1962 1962 1965.4 C-12