2.2.2 spase://VMO/NumericalData/WDC/Lerwick/Magnetometer/PT1H/WDC_FORMAT Lerwick Magnetometer 1-hr Data in WDC Format 2012-05-02T12:34:56.789 Lerwick 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: British 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/Sarah.Reay 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/Lerwick/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/Lerwick/Magnetometer MagneticField 1926-01-01T00:00:00.000 2009-12-31T23:00:00.000 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 Lerwick WDC Station Code: LER 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 Lerwick 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 Lerwick Horzontal Magnetic Field Magnitude PT1H nT 10^9 >T Cylindrical CGM 0 70000 9999 Projection.IJ Magnetic North-South Horizontal Magnetic Field Component X Lerwick 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 Lerwick 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 Lerwick 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 Lerwick Magnetic Field Magnitude PT1H nT 10^9 >T 0 70000 9999 Magnitude Magnetic LER 1926 D H Z LER 1927 D H Z LER 1928 D H Z LER 1929 D H Z LER 1930 D H Z LER 1931 D H Z LER 1932 D H Z LER 1933 D H Z LER 1934 D H Z LER 1935 D H Z LER 1936 D H Z LER 1937 D H Z LER 1938 D H Z LER 1939 D H Z LER 1940 D H Z LER 1941 D H Z LER 1942 D H Z LER 1943 D H Z LER 1944 D H Z LER 1945 D H Z LER 1946 D H Z LER 1947 D H Z LER 1948 D H Z LER 1949 D H Z LER 1950 D H Z LER 1951 D H Z LER 1952 D H Z LER 1953 D H Z LER 1954 D H Z LER 1955 D H Z LER 1956 D H Z LER 1957 D H Z LER 1958 D H Z LER 1959 D H Z LER 1960 D H Z LER 1961 D H Z LER 1962 D H Z LER 1963 D H Z LER 1964 D H Z LER 1965 D H Z LER 1966 D H Z LER 1967 D H Z LER 1968 D H Z LER 1969 D H Z LER 1970 D H Z LER 1971 D H Z LER 1972 D H Z LER 1973 D H Z LER 1974 D H Z LER 1975 D H Z LER 1976 D H Z LER 1977 D H Z LER 1978 D H Z LER 1979 D H Z LER 1980 D H Z LER 1981 D H Z LER 1982 D H Z LER 1983 D H Z F LER 1984 D H Z F LER 1985 D H Z F LER 1986 D H Z F LER 1987 D H Z F LER 1988 D H Z F LER 1989 D H Z F LER 1990 D H Z F LER 1991 D H Z F LER 1992 D H Z F LER 1993 D H Z F LER 1994 D H Z F LER 1995 D H Z F LER 1996 D H Z F LER 1997 D H Z F LER 1998 D H Z F LER 1999 D H Z F LER 2000 X Y Z F LER 2001 X Y Z F LER 2002 X Y Z F LER 2003 X Y Z F LER 2004 X Y Z F LER 2005 X Y Z F LER 2006 X Y Z F LER 2007 X Y Z F LER 2008 X Y Z F LER 2009 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