COSMIC RAY RESEARCH UNIT, POTCHEFSTROOM UNIVERSITY, POTCHEFSTROOM SOUTH AFRICA 3NM64 NEUTRON MONITOR SANAE, ANTARCTICA COORDINATES 70 19 S, 02 21 W ALTITUDE 52 METERS BAROMETRIC PRESSURE IN QUANTITIES OF 0.1 mB 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 1990 335 9863 9861 9861 9858 9856 9853 9856 9853 9850 9846 9843 9835 9826 9816 9806 9798 9790 9777 9767 9758 9752 9745 9737 9729 9814.0 24 2 12 1990 336 9719 9708 9699 9692 9686 9682 9678 9674 9672 9672 9671 9671 9671 9672 9674 9676 9680 9684 9690 0 9698 9705 9709 9712 9686.7 23 3 12 1990 337 9714 9719 9722 9727 9733 9733 9732 9733 9734 9733 9733 9733 9732 9733 9736 9735 9735 9735 9739 9740 9742 9745 9749 9751 9734.1 24 4 12 1990 338 9759 9763 9770 9772 9776 9776 9781 9787 9790 9790 9791 9790 9787 9781 9770 9758 9751 9743 9728 9717 9703 9685 9674 9660 9754.3 24 5 12 1990 339 9648 9635 9625 9618 9615 9610 9607 9608 9607 9609 9611 9612 9612 9614 9615 9618 9620 9625 9632 9637 9644 9651 9658 9665 9624.8 24 6 12 1990 340 9668 9672 9678 9684 9688 9691 9692 9692 9690 9687 9684 9684 9685 9683 9677 9673 9671 9670 9670 9668 9667 9666 9666 9665 9678.0 24 7 12 1990 341 9666 9667 9670 9672 9676 9680 9684 9689 9693 9697 9701 9705 9709 9714 9719 9725 9729 9736 9740 9747 9749 9753 9757 9760 9709.9 24 8 12 1990 342 9763 9765 9771 9775 9777 9777 9778 9777 9773 9768 9764 9759 9753 9746 9739 9731 9724 9718 9711 9704 9697 9688 9682 9675 9742.3 24 9 12 1990 343 9670 9664 9661 9657 9659 9657 9660 9666 9673 9679 9689 9701 9719 9735 9749 9763 9774 9785 9797 9809 9819 9830 9839 9850 9729.4 24 10 12 1990 344 9861 9869 9877 9884 9892 9897 9902 9908 9913 9914 9914 9916 9919 9922 9921 9924 9920 9922 9921 9920 9920 9919 9917 9916 9907.8 24 11 12 1990 345 9913 9912 9910 9908 9908 9909 9910 9909 9908 9906 9905 9902 9903 9900 9898 9897 9897 9897 9900 9902 9906 9909 9911 9915 9905.6 24 12 12 1990 346 9920 9925 9930 9936 9942 9947 9951 9956 9959 9963 9968 9970 9975 9979 9981 9981 9984 9984 9984 9985 9987 9990 9993 9995 9966.0 24 13 12 1990 347 9996 9998 10000 9999 10000 10001 10001 9999 9995 9992 9991 9986 9982 9977 9971 9965 9959 9954 9949 9941 9937 9933 9925 9917 9973.7 24 14 12 1990 348 9913 9910 9904 9899 9897 9892 9890 9892 9891 9892 9896 9903 9905 9908 9909 9911 9912 9916 9916 9916 9920 9920 9922 9925 9906.6 24 15 12 1990 349 9924 9924 9920 9915 9915 9916 9915 9914 9911 9911 9910 9907 9907 9905 9907 9902 9900 9899 9897 9894 9896 9895 9896 9897 9907.4 24 16 12 1990 350 9897 9895 9893 9895 9897 9897 9901 9901 9904 9907 9906 9907 9910 9911 9912 9911 9911 9911 9913 9917 9918 9919 9921 9921 9907.3 24 17 12 1990 351 9922 9924 9921 9920 9920 9918 9919 9920 9921 9922 9922 9922 9920 9922 9919 9919 9917 9914 9910 9907 9906 9903 9901 9899 9916.2 24 18 12 1990 352 9895 9892 9889 9886 9882 9880 9879 9876 9875 9880 9882 9882 9885 9889 9893 9895 9897 9899 9905 9909 9912 9914 9916 9916 9892.8 24 19 12 1990 353 9914 9909 9906 9901 9900 9896 9896 9894 9893 9892 9892 9890 9889 9886 9884 9884 9882 9879 9880 9881 9882 9882 9882 9882 9890.7 24 20 12 1990 354 9882 9882 9880 9881 9881 9878 9879 9882 9884 9887 9888 9892 9896 9898 9900 9902 9900 9899 9901 9899 9898 9897 9897 9893 9890.7 24 21 12 1990 355 9891 9889 9882 9878 9874 9871 9867 9865 9862 9857 9854 9850 9849 9848 9842 9838 9834 9831 9827 9822 9817 9813 9808 9805 9848.9 24 22 12 1990 356 9801 9797 9798 9796 9795 9798 9799 9802 9805 9807 9810 9813 9816 9820 9823 9827 9829 9830 9833 9837 9840 9842 9845 9848 9817.1 24 23 12 1990 357 9852 9856 9858 9860 9864 9868 9871 9871 9870 9874 9877 9879 9881 9883 9886 9889 9891 9891 9893 9896 9897 9895 9895 9898 9879.0 24 24 12 1990 358 9898 9899 9897 9896 9896 9896 9896 9896 9893 9891 9887 9883 9878 9875 9875 9874 9871 9873 9876 9878 9881 9884 9886 9891 9886.3 24 25 12 1990 359 9894 9895 9896 9900 9906 9912 9916 9921 9926 9932 9938 9942 9942 9945 9949 9950 9952 9955 9956 9957 9959 9957 9958 9958 9934.0 24 26 12 1990 360 9955 9955 9952 9951 9948 9942 9940 9938 9934 9932 9931 9927 9924 9922 9916 9911 9910 9906 9903 9902 9898 9896 9896 9894 9924.3 24 27 12 1990 361 9893 9892 9892 9889 9889 9890 9893 9895 9897 9898 9898 9898 9899 9900 9901 9903 9902 9902 9906 9909 9913 9915 9920 9921 9900.6 24 28 12 1990 362 9924 9927 9931 9933 9935 9936 9938 9943 9945 9949 9951 9952 9954 9953 9955 9955 9956 9956 9962 9963 9964 9965 9966 9969 9949.3 24 29 12 1990 363 9971 9973 9973 9974 9976 9978 9981 9981 9982 9982 9983 9984 9985 9986 9985 9981 9980 9981 9982 9981 9981 9976 9978 9976 9979.6 24 30 12 1990 364 9973 9969 9966 9962 9956 9951 9948 9942 9942 9939 9934 9931 9926 9923 9918 9911 9907 9904 9901 9898 9895 9894 9891 9887 9927.8 24 31 12 1990 365 9884 9883 9883 9882 9877 9876 9876 9875 9874 9871 9872 9874 9873 9871 9868 9867 9868 9868 9866 9865 9864 9862 9858 9853 9871.3 24 MONTHLY MEANS 9853 9853 9852 9852 9852 9852 9853 9854 9854 9854 9855 9855 9855 9855 9855 9854 9853 9853 9853 9859 9854 9853 9853 9853 9853.7 P-12