{ "Spase": { "xmlns": "http://www.spase-group.org/data/schema", "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance", "xsi:schemaLocation": "http://www.spase-group.org/data/schema http://www.spase-group.org/data/schema/spase-2_3_1.xsd", "Version": "2.3.1", "NumericalData": { "ResourceID": "spase://ISWI/NumericalData/SipleExperiment/VLF/PT0.00004S", "ResourceHeader": { "ResourceName": "Siple Experiment broadband VLF data", "DOI": "https://doi.org/10.48322/44y4-4j02", "ReleaseDate": "2021-06-14T22:37:42Z", "Description": "\n The Siple Station experiment ran from 1973-1988, during which time\n a long horizontal ELF transmitter was erected over a thick ice\n sheet in Antarctica, described by Raghuram et al [1974]. The\n transmitter broadcast tones and frequency ramps to probe the\n magnetosphere’s excitation and response to injected ELF/VLF\n signals, including amplification and triggered emissions from\n wave-particle interactions, along with natural signals like\n whistlers and chorus. Receivers were setup at Siple station (75.93\n deg. S, 84.25 deg. W geographic, corresponding to an invariant\n latitude of 60.4 deg. S, at L = 4.2), and \n near the geomagnetic conjugate point (first at Roberval, Quebec,\n Canada (48.52 deg. N, 72.23 deg. W) and in 1986\n near Lake Mistissini, Canada (50.42 deg. N, 73.87 deg. W)). Complete results of the Siple\n station experiment are summarized in Helliwell [1988] but analysis\n work on this dataset continued well after the experiment\n ended. These data were originally stored on Ampex magnetic tapes,\n then converted over to a digitized format with some error\n correction applied as described by Li et al [2014]. \n\n\n The sampling rate of these data are 25 kHz.\n\n The filename naming convention is:\n \n XXYYMMDDHHMMSS_ACC.mat\n\n where\n\n XX - Station ID\n \n YY - Year\n \n MM - Month\n \n DD - Day\n \n HH - Hour\n \n MM - Minute\n \n SS - Second\n \n A - Sampling rate. 0 for 100 kHz sampled data (VLF), 1 for 1 MHz\n sampled data (LF), 2 for 25 kHz sampled data (Siple station\n experiment).\n\n CC - 00 for N/S channel, 01 for E/W channel\n \n", "Acknowledgement": "\n DATA USAGE POLICY\n \nThe data in the WALDO database have been collected by Stanford\nUniversity, the Georgia Institute of Technology, and the University of\nColorado Denver. Funding has been provided by the United States\ngovernment under various basic science research grants over many\nyears. \n\nTo maximize the benefit of those investments, WALDO data are released\nwithout restriction, and can be freely analyzed or published. \n\nThe curators of WALDO are Morris Cohen (Georgia Tech) and Mark\nGolkowski (CU-Denver). We request that the following acknowledgement\nbe added in any publication using data from WALDO \n\n\"VLF data are provided by the WALDO database (https://waldo.world),\noperated jointly by the Georgia Institute of Technology, and the\nUniversity of Colorado Denver, using data collected from those\ninstitutions as well as Stanford University, and has been supported by\nvarious US government grants from the NSF, NASA, and the Department of\nDefense.\" \n\nIf extensive amounts of WALDO data are used in a publication, the\ncurators request, but do not require, to be contacted to discuss the\npossibility of joint authorship, with the WALDO curators providing\nhelp analyzing and interpreting the large dataset. \n ", "PublicationInfo": { "Authors": "Helliwell, Robert A.; Katsufrakis, John P.; Li, J. D.; Spasojevic, M.; Harid, V.; Cohen, Morris B.; Golkowski, Mark; Inan, Umran S..", "PublicationDate": "2020-01-01T00:00:00", "PublishedBy": "Worldwide Archive of Low frequency Data and Observations (WALDO)" }, "Contact": { "PersonID": "spase://SMWG/Person/Morris.Cohen", "Role": "ArchiveSpecialist" }, "InformationURL": { "Name": "Worldwide Archive of Low-Frequency Data and Observations (WALDO)", "URL": "https://waldo.world" } }, "AccessInformation": { "RepositoryID": "spase://SMWG/Repository/WALDO", "AccessURL": { "Name": "Worldwide Archive of Low-Frequency Data and Observations (WALDO) Broadband Data", "URL": "https://waldo.world/broadband-data/" }, "Format": "MATLAB_4", "Acknowledgement": "VLF data are provided by the WALDO database\n (https://waldo.world), operated jointly by the Georgia Institute of\n Technology, and the University of Colorado Denver, using data\n collected from those institutions as well as Stanford University,\n and has been supported by various US government grants from the\n NSF, NASA, and the Department of Defense.\n " }, "InstrumentID": "spase://SMWG/Instrument/SipleExperiment/VLF", "MeasurementType": "Waves.Passive", "TemporalDescription": { "TimeSpan": { "StartDate": "1973-01-01T00:00:00", "StopDate": "1988-01-01T00:00:00" } }, "ObservedRegion": [ "Earth.NearSurface", "Earth.NearSurface.Ionosphere" ], "Parameter": [ { "Name": "start_year", "Support": { "SupportQuantity": "Temporal" } }, { "Name": "start_month", "Support": { "SupportQuantity": "Temporal" } }, { "Name": "start_day", "Support": { "SupportQuantity": "Temporal" } }, { "Name": "start_hour", "Support": { "SupportQuantity": "Temporal" } }, { "Name": "start_minute", "Support": { "SupportQuantity": "Temporal" } }, { "Name": "start_second", "Support": { "SupportQuantity": "Temporal" } }, { "Name": "latitude", "Support": { "SupportQuantity": "Positional" } }, { "Name": "longitude", "Support": { "SupportQuantity": "Positional" } }, { "Name": "altitude", "Support": { "SupportQuantity": "Positional" } }, { "Name": "Fs", "Description": "Sampling rate of the data, 25 kHz. ", "CadenceMin": "PT0.000001S", "CadenceMax": "PT0.00001S", "Support": { "SupportQuantity": "Other" } }, { "Name": "gps_quality", "Support": { "SupportQuantity": "DataQuality" } }, { "Name": "adc_channel_number", "Support": { "SupportQuantity": "Other" } }, { "Name": "adc_sn", "Support": { "SupportQuantity": "Other" } }, { "Name": "adc_type", "Support": { "SupportQuantity": "Other" } }, { "Name": "antenna_bearings", "Support": { "SupportQuantity": "Orientation" } }, { "Name": "antenna_description", "Support": { "SupportQuantity": "InstrumentMode" } }, { "Name": "cal_factor", "Support": { "SupportQuantity": "Other" } }, { "Name": "computer_sn", "Support": { "SupportQuantity": "Other" } }, { "Name": "gps_sn", "Support": { "SupportQuantity": "Other" } }, { "Name": "hardware_description", "Support": { "SupportQuantity": "InstrumentMode" } }, { "Name": "is_broadband", "Support": { "SupportQuantity": "InstrumentMode" } }, { "Name": "station_description", "Support": { "SupportQuantity": "Other" } }, { "Name": "station_name", "Support": { "SupportQuantity": "Other" } }, { "Name": "VERSION", "Support": { "SupportQuantity": "Other" } }, { "Name": "data", "Wave": { "WaveType": "Electromagnetic", "WaveQuantity": "ACMagneticField", "FrequencyRange": { "SpectralRange": "RadioFrequency", "Low": "0.3", "High": "50", "Units": "kHz" } } } ] } } }