2.2.2 spase://VMO/NumericalData/WDC/Sitka/Magnetometer/PT1H/WDC_FORMAT Sitka Magnetometer 1-hr Data in WDC Format 2012-05-02T12:34:56.789 Sitka Magnetometer data, 1-hr time resoluion, in WDC format. Magnetic Field Vector Element List: DHXYZF. Note that the list of magnetic field elements that appear in the data set may change over the course of time. For instance, many stations have shifted from DHZ to the XYZ representation of the magnetic field. The time history listed below summarizes changes in element content. A description of the WDC Data Exchange Format for 1-hr magnetic field data is included at the end of this data product description. Please acknowledge: U.S. Geological Survey for providing the data observations, and the British Geological Survey, World Data Center for Geomagnetism, Edinburgh for providing access to the data. spase://SMWG/Person/Carol.A.K.Finn GeneralContact DataProducer spase://SMWG/Person/Jill.Caldwell GeneralContact DataProducer spase://SMWG/Person/Jeffrey.J.Love GeneralContact DataProducer spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact TechnicalContact The Geomagnetic Data Master Catalog at the WDC for Geomagnetism, Edinburgh http://www.wdc.bgs.ac.uk/catalog/intro.html Web site for access to magnetometer data hosted by the World Data Center for Geomagnetism, Edinburgh spase://VMO/NumericalData/WDC/Sitka/Magnetometer/PT1H spase://SMWG/Repository/UCLA/VMO Online Open The WDC Geomagnetic Data Master Catalog Repository ftp://ftp.nmh.ac.uk/wdc/obsdata/hourval/single_year The Geomagnetic Data Master Catalog hosted by the British Geological Survey, World Data Center for Geomagnetism, Edinburgh. Text ASCII 311710 bytes P1Y Please thank the British Geological Survey, World Data Center, Edinburgh for use of data from the WDC Geomagnetic Data Master Catalog. Calibrated spase://SMWG/Instrument/Ground/Sitka/Magnetometer MagneticField 1902-03-01T00:00:00.000 2010-12-31T23:00:00.000 Some data gaps may be present. If a gap is present at the beginning or end of the file, the time span start and stop dates could be inaccurate as they are assigned assuming an absence of such gaps. PT1H Earth.Surface ground station magnetometer magnetic field magnetogram Sitka WDC Station Code: SIT 1-hour WDC Format Universal Time Time Time is expressed using a five column format with the following order: year, month, day, hour, and minute, each stored in interger format. The time columns are the first five columns (1,2,3,4,5) in the flat file. PT1H 5 Universal Time expressed using a 5-column year, month, day, hour, minute representation Year 1 Month 2 Day 3 Hour 4 Minute 5 Temporal Magnetic Field Declination D Sitka Magnetic Field Vector Declination Angle PT1H Degree 2*pi > Radian Cylindrical CGM -180.0 180.0 9999 DirectionAngle.AzimuthAngle Magnetic Horzontal Magnetic Field Magnitude H Sitka Horzontal Magnetic Field Magnitude PT1H nT 10^9 >T Cylindrical CGM 0 70000 9999 Projection.IJ Magnetic North-South Horizontal Magnetic Field Component X Sitka North-South Horizontal Magnetic Field Component, positive Northward PT1H nT 10^9 >T Cartesian CGM -70000 70000 9999 Component.I Magnetic East-West Horizontal Magnetic Field Component Y Sitka East-West Horizontal Magnetic Field Component, positive Eastward PT1H nT 10^9 >T Cartesian CGM -70000 70000 9999 Component.J Magnetic Vertical Magnetic Field Component Z Sitka Vertical Magnetic Field Component, positive upward in the Southern hemisphere, positive downward in the Northern hemisphere PT1H nT 10^9 >T Cartesian CGM -70000 70000 9999 Component.K Magnetic Magnetic Field Magnitude F Sitka Magnetic Field Magnitude PT1H nT 10^9 >T 0 70000 9999 Magnitude Magnetic SIT 1902 D H SIT 1903 D H SIT 1904 D H SIT 1905 D H Z SIT 1906 D H Z SIT 1907 D H Z SIT 1908 D H Z SIT 1909 D H Z SIT 1910 D H Z SIT 1911 D H Z SIT 1912 D H Z SIT 1913 D H Z SIT 1914 D H Z SIT 1915 D H Z SIT 1916 D H Z SIT 1917 D H Z SIT 1918 D H Z SIT 1919 D H Z SIT 1920 D H Z SIT 1921 D H Z SIT 1922 D H Z SIT 1923 D H Z SIT 1924 D H Z SIT 1925 D H Z SIT 1926 D H Z SIT 1927 D H Z SIT 1928 D H Z SIT 1929 D H Z SIT 1930 D H Z SIT 1931 D H Z SIT 1932 D H Z SIT 1933 D H Z SIT 1934 D H Z SIT 1935 D H Z SIT 1936 D H Z SIT 1937 D H Z SIT 1938 D H Z SIT 1939 D H Z SIT 1940 D H Z SIT 1941 D H Z SIT 1942 D H Z SIT 1943 D H Z SIT 1944 D H Z SIT 1945 D H Z SIT 1946 D H Z SIT 1947 D H Z SIT 1948 D H Z SIT 1949 D H Z SIT 1950 D H Z SIT 1951 D H Z SIT 1952 D H Z SIT 1953 D H Z SIT 1954 D H Z SIT 1955 D H Z SIT 1956 D H Z SIT 1957 D H Z SIT 1958 D H Z SIT 1959 D H Z SIT 1960 D H Z SIT 1961 D H Z SIT 1962 D H Z SIT 1963 D H Z SIT 1964 D H Z SIT 1965 D H Z SIT 1966 D H Z SIT 1967 D H Z SIT 1968 D H Z SIT 1969 D H Z SIT 1970 D H Z SIT 1971 D H Z SIT 1972 D H Z SIT 1973 D H Z SIT 1974 D H Z SIT 1975 D H Z SIT 1976 D H Z SIT 1977 D H Z SIT 1978 D H Z SIT 1979 D H Z SIT 1980 D H Z SIT 1981 D H Z SIT 1982 D H Z SIT 1983 D H Z F SIT 1984 D H Z F SIT 1985 D H Z F SIT 1986 D H Z F SIT 1987 D H Z F SIT 1988 D H Z F SIT 1989 D H Z F SIT 1990 D H Z F SIT 1991 D H Z F SIT 1992 D H Z F SIT 1993 D H Z F SIT 1994 D H Z F SIT 1995 D H Z F SIT 1996 D H Z F SIT 1997 D H Z F SIT 1998 D H Z F SIT 1999 D H Z F SIT 2000 D H Z F SIT 2001 D H Z F SIT 2002 D H Z F SIT 2003 D H Z F SIT 2004 X Y Z F SIT 2005 X Y Z F SIT 2006 X Y Z F SIT 2007 X Y Z F SIT 2008 X Y Z F SIT 2009 X Y Z F SIT 2010 X Y Z F Digital WDC Exchange Format for Observatory Hourly Mean Values -------------------------------------------------------------- Magnetic data organized in 1-year files, with the information coded in ASCII Columns Format Description 1-3 A3 Observatory 3-letter code 4-5 I2 Year Last 2 digits, 1996 = 96. See also columns 15-16. 6-7 I2 Month (01-12) 8 Al Element (D, I, H, X, Y, Z, or F) 9-10 I2 Day of month (01-31) 11-12 A2 Blanks 13 A1 Arbitrary 14 A1 Arbitrary +-- Old Format: -------------------------+ 15-16 I2 Century digits Column 15: International Quiet or Year = 1889, Century digits = 18. Disturbed Days Q=1, D=2 Year = 1996, Century digits = 19. Column 16: Blank for data since 1900, Year = 2014, Century digits = 20. 8 for data before 1900. +----------------------------------------+ 17-20 I4 Tabular base The values are in degrees for D and I, and in hundreds of nanoTeslas for the intensity elements. 21-116 24I4 24 4-digit hourly mean values for the day. The values are in tenth-minutes for D and I, and in nanoTeslas for the intensity elements. The first hourly mean value represents the mean value between 00:00 UT and 01:00 UT, ..., the 24th value represents the mean between 23:00 UT and 24:00 UT. A missing value is identified by 9999. 117-120 I4 Daily Mean If any of the hourly mean values for the day are missing 9999 will appear as the daily mean. 121-122 Record end marker Two chars "cr"= 13 and "nl"= 10. The tabular bases, hourly mean values and daily means are right adjusted and signed if negative. Negative values are identified with a minus sign either adjacent to the first significant digit or in the high-order position of the field. Note: A blank digit will not appear between a (-) sign and the first significant digit. For example, a value may appear as -050 or b-50 but not as -b50 (b=blank). The 25 values in positions 21-120 will have the range -999 to 9998, with 9999 reserved for missing values. The records are sorted according to observatory code, year, month, element, day (positions 1-10). For the intensity elements: hourly value (nanoTeslas) = tab.base*100 + tab.value For the angles D and I: hourly value (Degrees) = tab.base + tab.value/600