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 1980 336 1890 1887 1885 1870 1870 1879 1865 1873 1859 1855 1868 1878 1862 1876 1871 1866 1852 1845 1847 1856 1853 1850 1854 1865 1865.7 24 2 12 1980 337 1873 1861 1866 1866 1865 1854 1861 1867 1865 1882 1877 1888 1871 1874 1872 1866 1870 1871 1872 1870 1867 1871 1858 1847 1868.1 24 3 12 1980 338 1857 1863 1850 1853 1865 1862 1852 1856 1870 1869 1873 1883 1877 1877 1874 1875 1869 1882 1884 1878 1881 1878 1869 1886 1870.1 24 4 12 1980 339 1888 1887 1864 1881 1873 1866 1880 1874 1892 1872 1892 1878 1882 1887 1884 1871 1874 1881 1880 1877 1885 1881 1880 1896 1880.2 24 5 12 1980 340 1876 1898 1879 1892 1884 1881 1898 1888 1909 1898 1914 1908 1905 1914 1893 1894 1909 1914 1911 1901 1910 1905 1907 1902 1899.6 24 6 12 1980 341 1911 1902 1914 1923 1905 1912 1912 1921 1933 1913 1928 1939 1915 1924 1925 1916 1923 1926 1923 1920 1918 1927 1920 1908 1919.1 24 7 12 1980 342 1909 1908 1905 1901 1906 1903 1909 1932 1925 1912 1934 1925 1939 1921 1933 1926 1933 1929 1922 1932 1923 1930 1961 1940 1923.3 24 8 12 1980 343 1944 1939 1950 1959 1942 1939 1951 1947 1946 1954 1960 1955 1964 1977 1961 1974 1960 1982 1977 1985 1982 1973 1968 1963 1960.5 24 9 12 1980 344 1966 1959 1973 1957 1961 1973 1975 1966 1988 1978 1981 1965 1981 1976 1997 1985 1978 1983 1988 1980 1979 1978 1984 1971 1975.9 24 10 12 1980 345 1990 1973 1984 1985 1980 1975 1982 1984 1980 1989 1973 1981 2002 1979 1972 1974 1981 1996 1976 1984 1979 1983 1982 1989 1982.2 24 11 12 1980 346 1973 1971 1975 1955 1957 1959 1965 1975 1982 1985 1976 1983 1984 1964 1977 1968 1965 1971 1926 1894 1907 1926 1925 1921 1957.7 24 12 12 1980 347 1924 1938 1950 1945 1945 1956 1944 1947 1947 1946 1944 1933 1940 1937 1934 1947 1932 1942 1940 1933 1929 1930 1939 1934 1939.8 24 13 12 1980 348 1921 1935 1951 1956 1949 1958 1948 1961 1946 1957 1960 1952 1953 1949 1958 1942 1932 1928 1927 1916 1920 1932 1910 1919 1940.8 24 14 12 1980 349 1922 1912 1927 1931 1926 1931 1922 1929 1932 1931 1929 1933 1938 1952 1929 1945 1940 1947 1950 1941 1951 1940 1936 1929 1934.3 24 15 12 1980 350 1927 1926 1930 1928 1935 1936 1940 1936 1952 1962 1949 1948 1948 1962 1954 1948 1949 1949 1939 1943 1929 1931 1928 1929 1940.8 24 16 12 1980 351 1929 1930 1922 1926 1928 1940 1933 1924 1929 1934 1946 1952 1950 1961 1935 1959 1952 1950 1942 1937 1960 1952 1945 1928 1940.2 24 17 12 1980 352 1947 1922 1936 1927 1937 1927 1938 1935 1944 1947 1950 1949 1948 1939 1939 1949 1945 1948 1945 1944 1943 1931 1917 1921 1938.7 24 18 12 1980 353 1925 1919 1920 1931 1925 1922 1914 1938 1933 1936 1947 1935 1943 1945 1951 1945 1942 1956 1939 1948 1962 1944 1964 1963 1939.5 24 19 12 1980 354 1941 1953 1949 1966 1947 1927 1933 1930 1938 1931 1935 1928 1927 1920 1923 1963 1965 1982 1976 1942 1922 1928 1917 1905 1939.5 24 20 12 1980 355 1924 1911 1934 1916 1920 1914 1913 1924 1928 1926 1944 1940 1948 1933 1933 1909 1908 1914 1908 1916 1909 1905 1896 1892 1919.4 24 21 12 1980 356 1896 1883 1892 1907 1903 1904 1905 1897 1902 1902 1904 1913 1912 1917 1915 1913 1919 1929 1905 1914 1915 1926 1920 1918 1908.8 24 22 12 1980 357 1917 1914 1914 1919 1919 1909 1913 1925 1922 1920 1924 1930 1923 1930 1913 1929 1925 1909 1917 1918 1920 1930 1924 1924 1920.3 24 23 12 1980 358 1928 1923 1934 1924 1930 1934 1917 1931 1943 1939 1931 1918 1936 1931 1936 1943 1952 1931 1941 1934 1941 1934 1943 1926 1933.3 24 24 12 1980 359 1948 1934 1934 1938 1927 1945 1947 1932 1931 1944 1940 1939 1932 1936 1938 1943 1934 1945 1942 1946 1943 1935 1935 1937 1938.5 24 25 12 1980 360 1938 1943 1936 1943 1945 1931 1916 1932 1930 1929 1947 1942 1946 1941 1961 1932 1948 1932 1952 1945 1951 1952 1943 1930 1940.2 24 26 12 1980 361 1946 1947 1938 1943 1953 1949 1935 1946 1943 1942 1939 1955 1952 1935 1949 1952 1946 1956 1944 1931 1953 1947 1939 1942 1945.1 24 27 12 1980 362 1937 1950 1944 1939 1941 1951 1964 1969 1967 1983 1982 1970 2000 1969 1975 1949 1947 1951 1951 1946 1937 1942 1943 1943 1956.3 24 28 12 1980 363 1949 1936 1929 1954 1953 1960 1956 1955 1957 1973 1948 1957 1972 1955 1985 1954 1949 1962 1948 1946 1945 1949 1961 1954 1954.5 24 29 12 1980 364 1939 1943 1942 1939 1946 1934 1937 1943 1943 1943 1948 1954 1947 1956 1942 1956 1940 1953 1926 1928 1924 1929 1930 1941 1941.0 24 30 12 1980 365 1938 1942 1932 1943 1944 1926 1938 1945 1947 1931 1956 1960 1963 1952 1950 1949 1942 1938 1941 1948 1943 1934 1940 1947 1943.7 24 31 12 1980 366 1949 1938 1935 1938 1960 1952 1937 1950 1950 1936 1942 1946 1941 1951 1942 1957 1954 1960 1950 1957 1955 1943 1945 1942 1947.1 24 MONTHLY MEANS 1927 1924 1926 1928 1927 1926 1926 1930 1933 1933 1937 1937 1939 1937 1936 1935 1933 1937 1932 1929 1930 1930 1928 1926 1931.1 C-12