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