{"xsi:schemaLocation":"https://www.spase-group.org/data/schema https://www.spase-group.org/data/schema/spase-2.7.1.xsd","Version":"2.7.1","MetadataRightsList":{"Rights":{"SchemeURI":"https://spdx.org/licenses/","RightsIdentifierScheme":"SPDX","RightsIdentifier":"CC0-1.0","RightsURI":"https://spdx.org/licenses/CC0-1.0.html","RightsName":"Creative Commons Zero v1.0 Universal","Note":"CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions"}},"NumericalData":{"ResourceID":"spase://NASA/NumericalData/Explorer43/MMF/PT2S","NamingAuthority":"NASA","ResourceType":"NumericalData","ResourceHeader":{"ResourceName":"Explorer 43 Measurement of Magnetic Fields (MMF) data at 15.36 s Resolution","AlternateName":["IMP 6 MMF data","IMP I MMF data","IMP EYE MMF data"],"DOI":"https://doi.org/10.48322/mhq4-fp67","ReleaseDate":"2026-07-21T12:04:56Z","RevisionHistory":{"RevisionEvent":[{"ReleaseDate":"2025-05-06T21:14:33Z","Note":"Only known prior ReleaseDate of the metadata"},{"ReleaseDate":"2025-11-14T16:03:09Z","Note":"Added PublicationInfo. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB"},{"ReleaseDate":"2025-12-04T13:29:12Z","Note":"Added MetadataRightsList. Updated to 2.7.1. ZCB"},{"ReleaseDate":"2026-06-26T13:16:56Z","Note":"Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB"},{"ReleaseDate":"2026-07-21T12:04:56Z","Note":"Added HelioData InformationURL. JWL"}]},"Description":"The Explorer 43 Measurement of Magnetic Fields (MMF) data at 15.36 s resolution in various coordinate systems.  These data consists of magnetic field vectors, variances, and spacecraft position measurements in several coordinate systems.","Acknowledgement":"NASA-Office of Space Science Applications (United States); Dr. Norman F. Ness","PublicationInfo":{"Authors":"Ness, Norman F.","PublicationDate":"2025-11-14T16:03:09Z","PublishedBy":"University of California, Los Angeles"},"Contact":[{"PersonID":"spase://SMWG/Person/Norman.F.Ness","Role":"PrincipalInvestigator"},{"PersonID":"spase://SMWG/Person/James.M.Weygand","Role":"MetadataContact"}],"InformationURL":[{"Name":"IMP I/Explorer 43 Spacecraft Information","URL":"https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1971-019A","Description":"Information about the magnetometer and other instruments onboard Explorer 43.","Language":"en"},{"Name":"HelioData","URL":"https://helio.data.nasa.gov/dataset/Explorer43_MMF_PT2S","Description":"The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more."}],"PriorID":["spase://VMO/NumericalData/Explorer/43/MMF/PT2S","spase://VSPO/NumericalData/Explorer/43/MMF/PT2S","spase://VSPO/NumericalData/Explorer43/MMF/PT2S"]},"AccessInformation":{"RepositoryID":"spase://SMWG/Repository/UCLA/VMO","Availability":"Online","AccessRights":"Open","AccessURL":{"Name":"Virtual Magnetospheric Observatory","URL":"http://vmo.igpp.ucla.edu/data1/Explorer/43/","Description":"Direct link to the Explorer 43 MMF data in ascii format."},"Format":"Text.ASCII","Encoding":"None","Acknowledgement":"NASA; Dr. Norman F. Ness"},"ProcessingLevel":"Calibrated","ProviderResourceName":"Explorer 43 MMF","ProviderProcessingLevel":"Level-2","InstrumentID":"spase://SMWG/Instrument/IMP6/MMF","MeasurementType":"MagneticField","TemporalDescription":{"TimeSpan":{"StartDate":"1971-03-11T00:00:00Z","StopDate":"1974-08-29T23:59:00Z","Note":"Time format in data files is year, day-of-year, and milliseconds of the day."},"Cadence":"PT15.34S"},"ObservedRegion":["Earth.Magnetosheath","Earth.Magnetosphere","Earth.Magnetosphere.Magnetotail"],"Caveats":"Flag value is unknown. All of the descriptions for the parameters are taken from original notes on the data. Not all the descriptions are clear.","Keyword":["15.36 s","Explorer","IMP I"],"Parameter":[{"Name":"Universal Time","ParameterKey":"Time","Description":"Universal time columns from left to right are: year, day of year, and milliseconds of the day.","Caveats":"This parameter is for the last sequence included in the 15.36 s statistical computation. for all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.","Cadence":"PT1S","Structure":{"Size":"3","Description":"Universal Time expressed using a 3-column year, day of year (Jan 1 = 0), and Millisec (Elapsed millisec in the day).","Element":[{"Name":"Year","Index":"1","ParameterKey":"Column_1"},{"Name":"Day of Year","Index":"2","ParameterKey":"Column_2"},{"Name":"Milliseconds of the Day","Index":"3","ParameterKey":"Column_3"}]},"Support":{"SupportQuantity":"Temporal"}},{"Name":"Data Quality Flag","Description":"8 bit counts. Order: from left to right: 2^7, 2^6,2^5,...2^0. Flags: from left to right: black, 90 degrees, 0 degrees, Heater, CAL, AUTO, range 2, and range, 1.","Caveats":"This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.","Support":{"SupportQuantity":"InstrumentMode"}},{"Name":"Orbit Number","Description":"Orbit number of Explroer 43 from the beginning of the mission.","Caveats":"This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.","Support":{"SupportQuantity":"Other"}},{"Name":"Bit Rate Flag","Description":"No description given.","Caveats":"This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.","Support":{"SupportQuantity":"Other"}},{"Name":"Pseudo Sequence Count","Description":"No description given.","Caveats":"This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.","Support":{"SupportQuantity":"Other"}},{"Name":"Actually Satellite Clock from spacecraft","Description":"No description given.","Caveats":"This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.","Support":{"SupportQuantity":"Temporal"}},{"Name":"House Keeping data","Description":"No description given.","Caveats":"This parameter is for the last sequence included in the 15.36 s statistical computation. For all data processed prior to 01/28/72 these quantities are for the sequence following the statistical computations.","Support":{"SupportQuantity":"Other"}},{"Name":"Field Magnitude (F1)","Description":"Averaged over 15.36 s. F1 = (1/N)*Sum to n of F_i where F_i is computed by the PAYAVG subroutine over 1.28 seconds. The PAYAVG subroutne was not available with the data or data descriptio.","Units":"gamma","Field":{"Qualifier":"Magnitude","FieldQuantity":"Magnetic"}},{"Name":"Field Magnitude (F2)","Description":"Averaged over 15.36 s. Fl = SQRT( ((1/N) ∑ X_i)^2 + ((1/N) ∑ Y_i)^2 + ((1/N) ∑ Z_i)^2 ) where X_i, Y_i, and Z_i are computed by the PAYAVG subroutine over 1.28 seconds. Sum from i=1 to N.","Units":"gamma","Field":{"Qualifier":"Magnitude","FieldQuantity":"Magnetic"}},{"Name":"Theta","Description":"Averaged over 15.36 s. Theta is sin^{-1}(Bz/B_manitude).","Units":"degrees","ValidMin":"-90","ValidMax":"+90","Field":{"Qualifier":"DirectionAngle.ElevationAngle","FieldQuantity":"Magnetic"}},{"Name":"Phi","Description":"Averaged over 15.36 s.","Units":"degrees","ValidMin":"0","ValidMax":"360","Field":{"Qualifier":"DirectionAngle.AzimuthAngle","FieldQuantity":"Magnetic"}},{"Name":"Variance from Averages","Description":"Variance matrix over 15.36 s. [Vxx,--,--;Vyx,Vyy,--;Vzx,Vzy,VZZ]. e.g., Vxx = ( (N ∑ X^{2}_{i}) - ∑ X_{i} ∑ X_{i} )/(N(N-1)). Vzy = ( (N ∑ Z_{i}Y_{i}) - ∑ Z_{i} ∑ Y_{i} )/(N(N-1)). Sum from i=1 to N.","Structure":{"Size":"6","Description":"Only includes 6 elements of the 3 by 3 matrix since three elements are repeated..","Element":[{"Name":"Variance XX from averages.","Index":"1","ParameterKey":"Column_14","Units":"gamma^2"},{"Name":"Variance YY from averages.","Index":"2","ParameterKey":"Column_15","Units":"gamma^2"},{"Name":"Variance ZZ from averages.","Index":"3","ParameterKey":"Column_16","Units":"gamma^2"},{"Name":"Variance YX from averages.","Index":"1","ParameterKey":"Column_17","Units":"gamma^2"},{"Name":"Variance ZX from averages.","Index":"1","ParameterKey":"Column_18","Units":"gamma^2"},{"Name":"Variance ZY from averages.","Index":"1","ParameterKey":"Column_19","Units":"gamma^2"}]},"Support":{"Qualifier":"Variance","SupportQuantity":"Other"}},{"Name":"N","Description":"Number of sequences over which statistics were comuted.","Support":{"Qualifier":"Total","SupportQuantity":"Other"}},{"Name":"ND","Description":"Number of detail points over which statistics were comuted.","Support":{"Qualifier":"Total","SupportQuantity":"Other"}},{"Name":"Trajectory Day","Description":"Jan 1 = 0.","Units":"day","Support":{"SupportQuantity":"Temporal"}},{"Name":"Trajectory Millisec of the Day","Units":"millisec","Support":{"SupportQuantity":"Temporal"}},{"Name":"Geomagnetic Latitude Satellite position","Units":"degrees","Support":{"Qualifier":"DirectionAngle.ElevationAngle","SupportQuantity":"Positional"}},{"Name":"Geomagnetic Longitude Satellite position","Units":"degrees","Support":{"Qualifier":"DirectionAngle.AzimuthAngle","SupportQuantity":"Positional"}},{"Name":"Geocentric Solar Ecliptic Satellite Position","Description":"Location of the spacecraft in GSE coordinates in units of kilometers.","CoordinateSystem":{"CoordinateRepresentation":"Cartesian","CoordinateSystemName":"GSE"},"Structure":{"Size":"3","Element":[{"Name":"X-GSE","Index":"1","ParameterKey":"Column_26","Units":"km"},{"Name":"Y-GSE","Index":"2","ParameterKey":"Column_27","Units":"km"},{"Name":"Z-GSE","Index":"3","ParameterKey":"Column_28","Units":"km"}]},"Support":{"SupportQuantity":"Positional"}},{"Name":"Radial Distance to Satellite from Earth's center","Units":"km","Support":{"Qualifier":"Magnitude","SupportQuantity":"Positional"}},{"Name":"Geocentric Solar Magnetospheric Satellite Position","Description":"Location of the spacecraft in GSM coordinates in units of kilometers.","CoordinateSystem":{"CoordinateRepresentation":"Cartesian","CoordinateSystemName":"GSM"},"Structure":{"Size":"2","Element":[{"Name":"Y-GSM","Index":"1","ParameterKey":"Column_30","Units":"km"},{"Name":"Z-GSE","Index":"2","ParameterKey":"Column_31","Units":"km"}]},"Support":{"SupportQuantity":"Positional"}},{"Name":"Geomagnetic Latitude Sun position","Units":"degrees","Support":{"Qualifier":"DirectionAngle.ElevationAngle","SupportQuantity":"Positional"}},{"Name":"Geomagnetic Longitude Sun position","Units":"degrees","Support":{"Qualifier":"DirectionAngle.AzimuthAngle","SupportQuantity":"Positional"}},{"Name":"Theoretical Geomagnetic Field Geocentric Solar Ecliptic","Description":"Theoretical geomagnetic field but the magnetic field model is unclear.","CoordinateSystem":{"CoordinateRepresentation":"Cartesian","CoordinateSystemName":"GSE"},"Structure":{"Size":"3","Element":[{"Name":"BX-GSE","Index":"1","ParameterKey":"Column_34","Units":"gamma"},{"Name":"BY-GSE","Index":"2","ParameterKey":"Column_35","Units":"gamma"},{"Name":"BZ-GSE","Index":"3","ParameterKey":"Column_36","Units":"gamma"}]},"Field":{"Qualifier":"Vector","FieldQuantity":"Magnetic"}},{"Name":"Rotation Matrix","Description":"Rotation matrix from GSE to GSM","Structure":{"Size":"9","Element":[{"Name":"1st row, 1st column","Index":"1","ParameterKey":"Column_37"},{"Name":"1st row, 2nd column","Index":"2","ParameterKey":"Column_38"},{"Name":"1st row, 3rd column","Index":"3","ParameterKey":"Column_39"},{"Name":"2nd row, 1st column","Index":"4","ParameterKey":"Column_40"},{"Name":"2nd row, 2nd column","Index":"5","ParameterKey":"Column_41"},{"Name":"2nd row, 3rd column","Index":"6","ParameterKey":"Column_42"},{"Name":"3rd row, 1st column","Index":"7","ParameterKey":"Column_43"},{"Name":"3rd row, 2nd column","Index":"8","ParameterKey":"Column_44"},{"Name":"3rd row, 3rd column","Index":"9","ParameterKey":"Column_45"}]},"Support":{"Qualifier":"Array","SupportQuantity":"Other"}},{"Name":"Rotation Matrix","Description":"Rotation matrix from celestial inertial to GSE","Structure":{"Size":"9","Element":[{"Name":"1st row, 1st column","Index":"1","ParameterKey":"Column_46"},{"Name":"1st row, 2nd column","Index":"2","ParameterKey":"Column_47"},{"Name":"1st row, 3rd column","Index":"3","ParameterKey":"Column_48"},{"Name":"2nd row, 1st column","Index":"4","ParameterKey":"Column_49"},{"Name":"2nd row, 2nd column","Index":"5","ParameterKey":"Column_50"},{"Name":"2nd row, 3rd column","Index":"6","ParameterKey":"Column_51"},{"Name":"3rd row, 1st column","Index":"7","ParameterKey":"Column_52"},{"Name":"3rd row, 2nd column","Index":"8","ParameterKey":"Column_53"},{"Name":"3rd row, 3rd column","Index":"9","ParameterKey":"Column_54"}]},"Support":{"Qualifier":"Array","SupportQuantity":"Other"}},{"Name":"Geocentric Latitude Satellite Position","Units":"degrees","Support":{"Qualifier":"DirectionAngle.ElevationAngle","SupportQuantity":"Positional"}},{"Name":"Geocentric Longitude Satellite Position","Units":"degrees","Support":{"Qualifier":"DirectionAngle.AzimuthAngle","SupportQuantity":"Positional"}},{"Name":"Right Ascension","Description":"Not clear what this is the right ascension of. Celestial Equatorial Coordinate System?","Units":"degrees","Support":{"Qualifier":"DirectionAngle.AzimuthAngle","SupportQuantity":"Positional"}},{"Name":"Declination","Description":"Not clear what this is the right ascension of. Celestial Equatorial Coordinate System?","Units":"degrees","Support":{"Qualifier":"DirectionAngle.ElevationAngle","SupportQuantity":"Positional"}},{"Name":"Theta Solar Ecliptic","Units":"degrees","Support":{"Qualifier":"DirectionAngle.ElevationAngle","SupportQuantity":"Positional"}},{"Name":"Theta Solar Magnetic","Units":"degrees","Support":{"Qualifier":"DirectionAngle.ElevationAngle","SupportQuantity":"Positional"}},{"Name":"Phi Solar Ecliptic","Units":"degrees","Support":{"Qualifier":"DirectionAngle.AzimuthAngle","SupportQuantity":"Positional"}},{"Name":"Phi Solar Magnetic","Units":"degrees","Support":{"Qualifier":"DirectionAngle.AzimuthAngle","SupportQuantity":"Positional"}},{"Name":"Magnetic Field Vector Solar Ecliptic","CoordinateSystem":{"CoordinateRepresentation":"Cartesian","CoordinateSystemName":"SE"},"Structure":{"Size":"3","Element":[{"Name":"BX-SE","Index":"1","ParameterKey":"Column_63","Units":"gamma"},{"Name":"BY-SE","Index":"2","ParameterKey":"Column_64","Units":"gamma"},{"Name":"BZ-SE","Index":"3","ParameterKey":"Column_65","Units":"gamma"}]},"Field":{"Qualifier":"Vector","FieldQuantity":"Magnetic"}},{"Name":"Magnetic Field Vector Solar Magnetic","CoordinateSystem":{"CoordinateRepresentation":"Cartesian","CoordinateSystemName":"SM"},"Structure":{"Size":"3","Element":[{"Name":"BX-SM","Index":"1","ParameterKey":"Column_66","Units":"gamma"},{"Name":"BY-SM","Index":"2","ParameterKey":"Column_67","Units":"gamma"},{"Name":"BZ-SM","Index":"3","ParameterKey":"Column_68","Units":"gamma"}]},"Field":{"Qualifier":"Vector","FieldQuantity":"Magnetic"}}]}}