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 1983 335 1997 1995 1993 1985 1989 1989 2001 2018 1994 2000 2003 2004 2007 2001 2012 1994 2012 1992 1994 1978 1976 1985 1987 1997 1996.0 24 2 12 1983 336 1996 1981 1995 1995 1975 1988 1988 1993 2000 2001 1995 1990 1998 1990 1999 1988 2009 1996 2003 2000 1988 1989 1993 1987 1993.2 24 3 12 1983 337 1987 1994 1991 1985 1990 1992 2000 2002 2004 2004 2006 1995 2013 2017 2011 2010 2005 2003 2003 1999 2005 2009 1999 2008 2001.3 24 4 12 1983 338 2001 1992 2019 2001 1996 1995 2011 2014 2009 2009 2016 2008 2025 2010 2020 2020 2029 2027 2004 2019 1999 2008 1998 2005 2009.8 24 5 12 1983 339 1999 1983 1995 1983 1984 1993 1991 1986 1994 1990 1999 2001 1996 1992 1995 1989 2011 1994 2005 2001 2004 1994 1998 1988 1994.4 24 6 12 1983 340 1986 1974 1976 1969 1985 1984 1981 1992 1975 1986 1997 1998 2001 2002 1997 1991 1995 1994 2002 1986 1983 1992 1989 1992 1988.6 24 7 12 1983 341 1980 1975 1988 1976 1970 1984 1988 1979 1977 1977 1984 1993 1983 1992 1999 1997 1977 1982 1981 1984 1993 1987 1975 1984 1983.5 24 8 12 1983 342 1992 1981 1994 1987 1980 1984 1991 1981 1972 1998 1991 1985 1995 1986 1989 1988 1985 1987 1975 1982 1977 1985 1990 1980 1985.6 24 9 12 1983 343 1980 2000 1988 1984 1981 1974 1993 1978 1979 1984 1967 1996 1986 1978 1967 1980 1993 1982 1986 1988 1990 2000 1983 2001 1984.9 24 10 12 1983 344 1993 1991 1983 1968 1961 1973 1958 1967 1956 1988 1971 1966 1975 1982 1984 1975 1990 1986 1987 1969 1984 1969 1974 1971 1975.9 24 11 12 1983 345 1977 1971 1981 1965 1962 1974 1964 1956 1963 1970 1965 1944 1967 1975 1982 1987 1989 1955 1965 1987 1977 1975 1982 1982 1971.5 24 12 12 1983 346 1981 1983 1977 1970 1969 1982 1968 1972 1957 1958 1974 1972 1963 1971 1974 1962 1953 1968 1963 1959 1944 1952 1965 1959 1966.5 24 13 12 1983 347 1970 1966 1971 1967 1969 1963 1975 1971 1970 1967 1976 1987 1976 1970 1976 1990 1974 1960 1964 1960 1961 1969 1965 1964 1970.0 24 14 12 1983 348 1976 1964 1974 1977 1971 1971 1975 1977 1983 1975 1980 1992 1992 2003 2003 1981 1974 1969 1976 1972 1975 1980 1971 1984 1979.0 24 15 12 1983 349 1983 1983 1972 1998 1991 1972 1985 1974 1987 1992 1983 1984 1990 1984 1971 1975 1984 1974 1971 1960 1968 1984 1974 1990 1980.4 24 16 12 1983 350 1968 1961 1958 1977 1971 1976 1973 1975 1984 1968 1979 1991 1976 1981 1976 1959 1982 1972 1979 1968 1973 1971 1977 1987 1974.3 24 17 12 1983 351 1977 1968 1978 1980 1988 1973 1988 1990 1977 1981 1960 1972 1977 1978 1974 1966 1973 1977 1979 1979 1973 1987 1970 1979 1976.8 24 18 12 1983 352 1986 1989 1990 1964 1976 1977 1979 1989 1979 1976 1977 1975 1968 1973 1983 1981 1990 1999 1996 2002 1989 1990 1987 1978 1983.0 24 19 12 1983 353 1980 1974 1975 1975 1988 1976 1980 1985 1979 1973 1986 1999 1987 1973 1981 1967 1982 1982 1971 1982 1957 1981 1976 1976 1978.5 24 20 12 1983 354 1979 1986 1976 1983 1980 1990 1990 1996 2007 1995 1998 1999 1989 2006 1992 1988 1990 1980 1979 1992 1992 2014 1996 1996 1991.4 24 21 12 1983 355 1982 1981 1980 1982 1984 1982 1988 1983 1989 1986 1992 1988 2008 2011 1990 1994 1996 2003 1986 1988 1987 1996 1993 1985 1989.8 24 22 12 1983 356 1988 1989 1991 1981 1997 1974 2002 1989 2001 2010 2012 2010 2003 2000 2010 2011 2013 2008 1994 1993 1994 2011 1996 2005 1999.3 24 23 12 1983 357 2003 1990 1991 1981 1986 1987 1999 1995 1996 2000 1992 1998 1988 2015 2008 1999 2002 2003 1990 2006 2010 2002 1990 1999 1997.1 24 24 12 1983 358 2006 2011 1996 1994 1999 1996 1996 1986 1987 1993 1990 1988 2002 2000 2010 2010 2015 2012 1997 2004 2001 1989 1996 1994 1998.8 24 25 12 1983 359 1999 2013 2004 1996 1996 2004 1995 1993 1983 1995 2005 1991 2001 2007 2016 2013 2002 1999 2006 2004 1997 2001 1999 2001 2000.8 24 26 12 1983 360 1993 1999 1994 1982 1996 1986 1998 1990 2003 1993 1996 1999 2002 2003 2011 2000 2003 1997 2007 2010 2016 2001 2006 1999 1999.3 24 27 12 1983 361 1999 2002 2011 1979 1996 1982 1991 1989 2003 2002 2001 1999 1999 1992 2001 2001 2000 2005 1988 2016 2014 1993 2016 1990 1998.7 24 28 12 1983 362 2002 1997 1996 2003 1984 2010 2001 2007 2005 2013 2010 2018 2014 2023 2002 2010 2001 1995 2004 2008 2001 2001 2008 2009 2005.1 24 29 12 1983 363 2010 1999 1990 2000 1994 1994 2020 2009 2022 2024 2017 2020 2026 2010 2015 2025 2004 2006 2006 2008 2004 2009 2004 2015 2009.6 24 30 12 1983 364 2012 2010 2003 2002 2012 1986 2006 1999 1999 2004 1993 2001 2014 1997 2009 1984 1999 1995 2004 2001 1998 2002 1993 1998 2000.9 24 31 12 1983 365 1980 1978 1995 1973 1982 1985 1973 1986 1997 2002 1979 2002 1996 1997 1999 2000 1977 1982 1997 1991 2006 2012 2009 1988 1991.1 24 MONTHLY MEANS 1989 1986 1988 1983 1984 1984 1989 1988 1988 1991 1990 1992 1994 1994 1995 1991 1994 1990 1989 1990 1988 1992 1989 1990 1989.5 C-12