2.3.0 spase://NASA/NumericalData/Explorer43/MMF/PT2S Explorer 43 Measurement of Magnetic Fields (MMF) data at 15.36 s Resolution IMP 6 MMF data IMP I MMF data IMP EYE MMF data 2020-07-07T21:14:33Z 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. NASA-Office of Space Science Applications (United States); Dr. Norman F. Ness spase://SMWG/Person/Norman.F.Ness PrincipalInvestigator spase://SMWG/Person/James.M.Weygand MetadataContact IMP I/Explorer 43 Spacecraft Information https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1971-019A Information about the magnetometer and other instruments onboard Explorer 43. en spase://VMO/NumericalData/Explorer/43/MMF/PT2S spase://VSPO/NumericalData/Explorer/43/MMF/PT2S spase://VSPO/NumericalData/Explorer43/MMF/PT2S spase://SMWG/Repository/UCLA/VMO Online Open Virtual Magnetospheric Observatory http://vmo.igpp.ucla.edu/data1/Explorer/43/ Direct link to the Explorer 43 MMF data in ascii format. Text.ASCII None NASA; Dr. Norman F. Ness Calibrated Explorer 43 MMF Level-2 spase://SMWG/Instrument/IMP6/MMF MagneticField 1971-03-11T00:00:00 1974-08-29T23:59:00 Time format in data files is year, day-of-year, and milliseconds of the day. PT15.34S 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. 15.36 s Explorer IMP I Universal Time Time Universal time columns from left to right are: year, day of year, and milliseconds of the day. 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. PT1S 3 Universal Time expressed using a 3-column year, day of year (Jan 1 = 0), and Millisec (Elapsed millisec in the day). Year 1 Column_1 Day of Year 2 Column_2 Milliseconds of the Day 3 Column_3 Temporal Data Quality Flag 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. 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. InstrumentMode Orbit Number Orbit number of Explroer 43 from the beginning of the mission. 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. Other Bit Rate Flag No description given. 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. Other Pseudo Sequence Count No description given. 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. Other Actually Satellite Clock from spacecraft No description given. 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. Temporal House Keeping data No description given. 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. Other Field Magnitude (F1) 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. gamma Magnitude Magnetic Field Magnitude (F2) 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. gamma Magnitude Magnetic Theta Averaged over 15.36 s. Theta is sin^{-1}(Bz/B_manitude). degrees -90 +90 DirectionAngle.ElevationAngle Magnetic Phi Averaged over 15.36 s. degrees 0 360 DirectionAngle.AzimuthAngle Magnetic Variance from Averages 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. 6 Only includes 6 elements of the 3 by 3 matrix since three elements are repeated.. Variance XX from averages. 1 Column_14 gamma^2 Variance YY from averages. 2 Column_15 gamma^2 Variance ZZ from averages. 3 Column_16 gamma^2 Variance YX from averages. 1 Column_17 gamma^2 Variance ZX from averages. 1 Column_18 gamma^2 Variance ZY from averages. 1 Column_19 gamma^2 Variance Other N Number of sequences over which statistics were comuted. Total Other ND Number of detail points over which statistics were comuted. Total Other Trajectory Day Jan 1 = 0. day Temporal Trajectory Millisec of the Day millisec Temporal Geomagnetic Latitude Satellite position degrees DirectionAngle.ElevationAngle Positional Geomagnetic Longitude Satellite position degrees DirectionAngle.AzimuthAngle Positional Geocentric Solar Ecliptic Satellite Position Location of the spacecraft in GSE coordinates in units of kilometers. Cartesian GSE 3 X-GSE 1 Column_26 km Y-GSE 2 Column_27 km Z-GSE 3 Column_28 km Positional Radial Distance to Satellite from Earth's center km Magnitude Positional Geocentric Solar Magnetospheric Satellite Position Location of the spacecraft in GSM coordinates in units of kilometers. Cartesian GSM 2 Y-GSM 1 Column_30 km Z-GSE 2 Column_31 km Positional Geomagnetic Latitude Sun position degrees DirectionAngle.ElevationAngle Positional Geomagnetic Longitude Sun position degrees DirectionAngle.AzimuthAngle Positional Theoretical Geomagnetic Field Geocentric Solar Ecliptic Theoretical geomagnetic field but the magnetic field model is unclear. Cartesian GSE 3 BX-GSE 1 Column_34 gamma BY-GSE 2 Column_35 gamma BZ-GSE 3 Column_36 gamma Vector Magnetic Rotation Matrix Rotation matrix from GSE to GSM 9 1st row, 1st column 1 Column_37 1st row, 2nd column 2 Column_38 1st row, 3rd column 3 Column_39 2nd row, 1st column 4 Column_40 2nd row, 2nd column 5 Column_41 2nd row, 3rd column 6 Column_42 3rd row, 1st column 7 Column_43 3rd row, 2nd column 8 Column_44 3rd row, 3rd column 9 Column_45 Array Other Rotation Matrix Rotation matrix from celestial inertial to GSE 9 1st row, 1st column 1 Column_46 1st row, 2nd column 2 Column_47 1st row, 3rd column 3 Column_48 2nd row, 1st column 4 Column_49 2nd row, 2nd column 5 Column_50 2nd row, 3rd column 6 Column_51 3rd row, 1st column 7 Column_52 3rd row, 2nd column 8 Column_53 3rd row, 3rd column 9 Column_54 Array Other Geocentric Latitude Satellite Position degrees DirectionAngle.ElevationAngle Positional Geocentric Longitude Satellite Position degrees DirectionAngle.AzimuthAngle Positional Right Ascension Not clear what this is the right ascension of. Celestial Equatorial Coordinate System? degrees DirectionAngle.AzimuthAngle Positional Declination Not clear what this is the right ascension of. Celestial Equatorial Coordinate System? degrees DirectionAngle.ElevationAngle Positional Theta Solar Ecliptic degrees DirectionAngle.ElevationAngle Positional Theta Solar Magnetic degrees DirectionAngle.ElevationAngle Positional Phi Solar Ecliptic degrees DirectionAngle.AzimuthAngle Positional Phi Solar Magnetic degrees DirectionAngle.AzimuthAngle Positional Magnetic Field Vector Solar Ecliptic Cartesian SE 3 BX-SE 1 Column_63 gamma BY-SE 2 Column_64 gamma BZ-SE 3 Column_65 gamma Vector Magnetic Magnetic Field Vector Solar Magnetic Cartesian SM 3 BX-SM 1 Column_66 gamma BY-SM 2 Column_67 gamma BZ-SM 3 Column_68 gamma Vector Magnetic