2.2.2 spase://VMO/NumericalData/WDC/Dumont.d.Urville/Magnetometer/PT1H/WDC_FORMAT Dumont d'Urville Magnetometer 1-hr Data in WDC Format 2012-05-02T12:34:56.789 Dumont d'Urville Magnetometer data, 1-hr time resoluion, in WDC format. Magnetic Field Vector Element List: XYZF. 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: Ecole et Observatoire des Sciences de la Terre (EOST) 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/Aude.Chambodut GeneralContact DataProducer spase://SMWG/Person/Armelle.Bernard 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/Dumont.dUrville/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/Dumont.d.Urville/Magnetometer MagneticField 1957-04-01T00:00:00.000 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 Dumont d'Urville WDC Station Code: DRV 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 North-South Horizontal Magnetic Field Component X Dumont d'Urville 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 Dumont d'Urville 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 Dumont d'Urville 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 Dumont d'Urville Magnetic Field Magnitude PT1H nT 10^9 >T 0 70000 9999 Magnitude Magnetic DRV 1957 X Y Z F DRV 1958 X Y Z F DRV 1959 X Y Z F DRV 1960 X Y Z F DRV 1961 X Y Z F DRV 1962 X Y Z F DRV 1963 X Y Z F DRV 1964 X Y Z F DRV 1965 X Y Z F DRV 1966 X Y Z F DRV 1967 X Y Z F DRV 1968 X Y Z F DRV 1969 X Y Z F DRV 1970 X Y Z F DRV 1971 X Y Z F DRV 1972 X Y Z F DRV 1973 X Y Z F DRV 1974 X Y Z F DRV 1975 X Y Z F DRV 1976 X Y Z F DRV 1977 X Y Z F DRV 1978 X Y Z F DRV 1979 X Y Z F DRV 1980 X Y Z F DRV 1981 X Y Z F DRV 1982 X Y Z F DRV 1983 X Y Z F DRV 1984 X Y Z F DRV 1985 X Y Z F DRV 1986 X Y Z F DRV 1987 X Y Z F DRV 1988 X Y Z F DRV 1989 X Y Z F DRV 1990 X Y Z F DRV 1991 X Y Z F DRV 1992 X Y Z F DRV 1993 X Y Z F DRV 1994 X Y Z F DRV 1995 X Y Z F DRV 1996 X Y Z F DRV 1997 X Y Z F DRV 1998 X Y Z F DRV 1999 X Y Z F DRV 2000 X Y Z F DRV 2001 X Y Z F DRV 2002 X Y Z F DRV 2003 X Y Z F DRV 2004 X Y Z F DRV 2005 X Y Z F DRV 2006 X Y Z F DRV 2007 X Y Z F DRV 2008 X Y Z F DRV 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