2.2.2 spase://VMO/NumericalData/WDC/College/Magnetometer/PT1H/WDC_FORMAT College Magnetometer 1-hr Data in WDC Format 2012-05-02T12:34:56.789 College 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/Jill.Caldwell GeneralContact DataProducer spase://SMWG/Person/Jeffrey.J.Love GeneralContact DataProducer spase://SMWG/Person/Carol.A.K.Finn 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/College/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/College/Magnetometer MagneticField 1948-01-01T00:00:00.000 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 College WDC Station Code: CMO 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 College 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 College Horzontal Magnetic Field Magnitude PT1H nT 10^9 >T Cylindrical CGM 0 70000 9999 Projection.IJ Magnetic North-South Horizontal Magnetic Field Component X College 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 College 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 College 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 College Magnetic Field Magnitude PT1H nT 10^9 >T 0 70000 9999 Magnitude Magnetic CMO 1948 D H Z CMO 1949 D H Z CMO 1950 D H Z CMO 1951 D H Z CMO 1952 D H Z CMO 1953 D H Z CMO 1954 D H Z CMO 1955 D H Z CMO 1956 D H Z CMO 1957 D H Z CMO 1958 D H Z CMO 1959 D H Z CMO 1960 D H Z CMO 1961 D H Z CMO 1962 D H Z CMO 1963 D H Z CMO 1964 D H Z CMO 1965 D H Z CMO 1966 D H Z CMO 1967 D H Z CMO 1968 D H Z CMO 1969 D H Z CMO 1970 D H Z CMO 1971 D H Z CMO 1972 D H Z CMO 1973 D H Z CMO 1974 D H Z CMO 1975 D H Z CMO 1976 D H Z CMO 1977 D H Z CMO 1978 D H Z CMO 1979 D H Z CMO 1980 D H Z F CMO 1981 D H Z CMO 1982 D H Z F CMO 1983 D H Z CMO 1984 D H Z F CMO 1985 D H Z F CMO 1986 D H Z F CMO 1987 D H Z F CMO 1988 D H Z F CMO 1989 D H Z F CMO 1990 D H Z F CMO 1991 D H Z F CMO 1992 D H Z F CMO 1993 D H Z F CMO 1994 D H Z F CMO 1995 D H Z F CMO 1996 D H Z F CMO 1997 D H Z F CMO 1998 D H Z F CMO 1999 D H Z F CMO 2000 D H Z F CMO 2001 D H Z F CMO 2002 D H Z F CMO 2003 D H Z F CMO 2004 X Y Z F CMO 2005 X Y Z F CMO 2006 X Y Z F CMO 2007 X Y Z F CMO 2008 X Y Z F CMO 2009 X Y Z F CMO 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