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