{ "CDFFileInfo": { "FileVersion": "3.9.0", "Format": "SINGLE", "Majority": "COLUMN", "Encoding": "NETWORK" }, "CDFglobalAttributes": { "Project": "STP>Solar-Terrestrial Physics", "Source_name": "TS2>Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellite 2", "Discipline": "Space Physics>Magnetospheric Science Space Physics>Ionospheric Science", "Data_type": "bdc-16sps", "Descriptor": "l2_mag>DC Magnetometer", "File_naming_convention": "source_descriptor_datatype_yyyyMMdd", "Data_version": "\u0000", "PI_name": "\u0000", "PI_affiliation": "\u0000", "TEXT": "Calibrated fluxgate magnetometer data acquired by TRACERS. Data have been calibrated, despun, and detrended against the International Geomagnetic Reference Field (IGRF). These CDF files are labeled using a version number (x,y,z), where x=0 indicates preliminary data subject to further revision of the attitude solution. Torquer coil signals are not processed at this stage; therefore, measurements acquired during torquer coils operation are clipped from this data. Caveats: (1) uses a best estimate for spacecraft attitude adjustment; (2) includes an ad-hoc delta-IGRF determined as a function of orbit phase to further minimize the amount of background field in the delta-Bs. (3) some intervals retain residual spin-period noise of undetermined origin, possibly due to gain nonlinearity.", "Instrument_type": "Magnetic Fields (space)", "Mission_group": "TRACERS", "Logical_source": "ts2_l2_mag_bdc-16sps", "Logical_file_id": "ts2_l2_mag_bdc-16sps_00000000_v01", "Logical_source_description": "TRACERS 2 Level 2 Fluxgate Magnetometer (MAG) Direct Current Magnetic Field (BDC) 16 samples per second (SPS) Data", "Time_resolution": "Variable", "Rules_of_use": "https://tracers.physics.uiowa.edu/rules-use", "Generated_by": "UCLA TRACERS MAG", "Generated_date": "2026-08-21/08:48:08", "Acknowledgement": "David Miles, TRACERS PI and Robert J. Strangeway", "MODS": "Initial CDF development 2024-12-20", "LINK_TEXT": [ "TRACERS Homepage", "TRACERS Mission Page", "MAG Instrument Paper", "TRACERS00READ.TXT", "TRACERS CMAD" ], "LINK_TITLE": [ "at Univ. of Iowa", "at NASA", "in Space Science Reviews", "at GSFC SPDF", "at GSFC" ], "HTTP_LINK": [ "https://tracers.physics.uiowa.edu/", "https://science.nasa.gov/mission/tracers/", "https://doi.org/10.1007/s11214-025-01212-3", "https://cdaweb.gsfc.nasa.gov/pub/data/tracers/00readme.html", "https://cdaweb.gsfc.nasa.gov/pub/data/tracers/documents/TRACERS-CMAD.pdf" ], "Magcal_version": "\u0000", "Magcal_date": "\u0000", "Doi": "\u0000", "Software_name": "\u0000", "Software_version": "\u0000", "Parents": "\u0000" }, "CDFVariables": { "ts2_l2_mag_16sps_epoch": { "VarDescription": { "DataType": "CDF_TIME_TT2000", "NumDims": 0, "NumElements": 1, "PadValue": "0000-01-01T00:00:00.000000000", "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Default Time for 16sps Processed Data", "FIELDNAM": "Time since Jan 1, 2000", "FILLVAL": "9999-12-31T23:59:59.999999999", "LABLAXIS": "16sps_epoch", "MONOTON": "INCREASE", "REFERENCE_POSITION": "Rotating Earth Geoid", "SCALETYP": "linear", "TIME_BASE": "J2000", "TIME_SCALE": "Terrestrial Time", "UNITS": "ns", "VALIDMAX": "2029-12-31T23:59:57.999999999", "VALIDMIN": "1990-01-01T00:00:00.000000000", "VAR_NOTES": "Time is specified as a TT2000 variable.", "VAR_TYPE": "support_data", "x_UNITS": "ns", "x_LABLAXIS": "16sps_epoch" } }, "ts2_l2_mag_16sps_tss_deltab": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "DeltaB in TRACERS Spin Sun Adjusted Coordinates", "COORD_FRAME": "TS2_TSS_adj", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_tss_deltab", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "dB_tss", "LABL_PTR_1": "ts2_l2_mag_16sps_tss_deltab_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "DeltaB in TRACERS Spin Sun Adjusted Coordinates. Model Magnetic Field is IGRF version 14. Original TRACERS Spin Sun Coordinates (TSS) are defined as: Z-TSS along the spin-axis; Y-TSS in the direction of Z-TSS cross R-spacecraft-to-Sun; X-TSS completes the right-handed orthogonal set, roughly sunward. TSS_adj is an adjusted coordinate system in which spin axis direction has been corrected to remove spin-tone signals. The residual field is calculated by subtracting IGRF and deltaIGRF from total field to minimize the background field. ", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "dB_tss", "x_LABLAXES": [ [ "dBx", "dBy", "dBz" ] ] } }, "ts2_l2_mag_16sps_gei2000_deltab": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "DeltaB in Geocentric Equatorial Inertial Coordinates for Epoch J2000", "COORD_FRAME": "GEI2000", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_gei2000_deltab", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "dB_gei2000", "LABL_PTR_1": "ts2_l2_mag_16sps_gei2000_deltab_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "DeltaB in Geocentric Equatorial Inertial coordinates. Model Magnetic Field is IGRF version 14. Geocentric Equatorial Inertial Coordinates for Epoch J2000(GEI2000) are defined as: X-GEI2000 aligned with mean equinox for epoch J2000; Z-GEI2000 along the spin axis of the Earth, pointing northward; Y-GEI2000 completes the right-handed orthogonal set.", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "dB_gei2000", "x_LABLAXES": [ [ "dBx", "dBy", "dBz" ] ] } }, "ts2_l2_mag_16sps_geo_deltab": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "DeltaB in Geographic Coordinates", "COORD_FRAME": "GEO", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_geo_deltab", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "dB_geo", "LABL_PTR_1": "ts2_l2_mag_16sps_geo_deltab_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "DeltaB in Geographic coordinates. Model Magnetic Field is IGRF version 14. Geographic Coordinates are defined as: Z-GEO along the spin axis of the Earth, pointing northward; X-GEO points to 0 degree longitude reference meridian; Y-GEO completes the right-handed orthogonal set.", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "dB_geo", "x_LABLAXES": [ [ "dBx", "dBy", "dBz" ] ] } }, "ts2_l2_mag_16sps_sm_deltab": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "DeltaB in Solar Magnetic Coordinates", "COORD_FRAME": "SM", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_sm_deltab", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "dB_sm", "LABL_PTR_1": "ts2_l2_mag_16sps_sm_deltab_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "DeltaB in Solar Magnetic coordinates. Model Magnetic Field is IGRF version 14. Solar Magnetic Coordinates(SM) are defined as: Z-SM along the vector from the center of the Earth through the north pole of the IGRF-14; Y-SM in the direction of Z-SM cross R-Earth-to-Sun; X-SM completes the right-handed orthogonal set.", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "dB_sm", "x_LABLAXES": [ [ "dBx", "dBy", "dBz" ] ] } }, "ts2_l2_mag_16sps_fac_deltab": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "DeltaB in Field-Aligned Coordinates", "COORD_FRAME": "TS2_FAC", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_fac_deltab", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "dB_fac", "LABL_PTR_1": "ts2_l2_mag_16sps_fac_deltab_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "DeltaB in Field-Aligned Coordinates. Model Magnetic Field is IGRF version 14. Field-Aligned Coordinates (FAC) defined as: Z-FAC along the IGRF 14 model magnetic field at the spacecraft location; Y-FAC in the direction of Z-FAC cross R-Earth-to-spacecraft; X-FAC completes the right-handed orthogonal set. ", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "dB_fac", "x_LABLAXES": [ [ "dBx", "dBy", "dBz" ] ] } }, "ts2_l2_mag_16sps_fvc_deltab": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "DeltaB in Field Velocity Coordinates", "COORD_FRAME": "TS2_FVC", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_fvc_deltab", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "dB_fvc", "LABL_PTR_1": "ts2_l2_mag_16sps_fvc_deltab_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "DeltaB in Field Velocity Coordinates. Model Magnetic Field is IGRF version 14. Field Velocity Coordinates(FVC) defined as: Z-FVC along the IGRF 14 model magnetic field at the spacecraft location; Y-FVC in the direction of Z-FVC cross V-spacecraft-velocity-relative-to-Earth-vector; X-FVC completes the right-handed orthogonal set. ", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "dB_fvc", "x_LABLAXES": [ [ "dBx", "dBy", "dBz" ] ] } }, "ts2_l2_mag_16sps_tss_b": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Full Magnetic Field in TRACERS Spin Sun Adjusted Coordinates", "COORD_FRAME": "TS2_TSS_adj", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_tss_b", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "B_tss", "LABL_PTR_1": "ts2_l2_mag_16sps_tss_b_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "Full (non-detrended) magnetometer data in TRACERS Spin Sun Adjusted Coordinates. Original TRACERS Spin Sun Coordinates(TSS) are defined as: Z-TSS along the spin-axis; Y-TSS in the direction of Z-TSS cross R-spacecraft-to-Sun; X-TSS completes the right-handed orthogonal set, roughly sunward. TSS_adj is an adjusted coordinate system in which spin axis directionhas been corrected to remove spin-tone signals.", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "B_tss", "x_LABLAXES": [ [ "Bx", "By", "Bz" ] ] } }, "ts2_l2_mag_16sps_gei2000_b": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Full Magnetic Field in Geocentric Equatorial Inertial Coordinates for Epoch J2000", "COORD_FRAME": "GEI2000", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_gei2000_b", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "B_gei2000", "LABL_PTR_1": "ts2_l2_mag_16sps_gei2000_b_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "Full (non-detrended) magnetometer data in Geocentric Equatorial Inertial Coordinates for Epoch J2000(GEI2000). GEI2000 are defined as: X-GEI2000 aligned with mean equinox for epoch J2000; Z-GEI2000 along the spin axis of the Earth, pointing northward; Y-GEI2000 completes the right-handed orthogonal set. ", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "B_gei2000", "x_LABLAXES": [ [ "Bx", "By", "Bz" ] ] } }, "ts2_l2_mag_16sps_geo_b": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Full Magnetic Field in Geographic Coordinates", "COORD_FRAME": "GEO", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_geo_b", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "B_geo", "LABL_PTR_1": "ts2_l2_mag_16sps_geo_b_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "Full (non-detrended) magnetometer data in Geographic Coordinates. Z-GEO along the spin axis of the Earth, pointing northward; X-GEO points to 0 degree longitude reference meridian; Y-GEO completes the right-handed orthogonal set.", "VAR_TYPE": "data", "x_UNITS": "nT", "x_LABLAXIS": "B_geo", "x_LABLAXES": [ [ "Bx", "By", "Bz" ] ] } }, "ts2_l2_mag_16sps_tweaker": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 6 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Time-Varying Tweaker Matrix", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_tweaker", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "tweaker", "LABL_PTR_1": "ts2_l2_mag_16sps_tweaker_labl", "SCALETYP": "linear", "UNITS": "null", "VALIDMAX": [ 100000.0, 100000.0, 100000.0, 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0, -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "Time-varying tweaker matrix that gives final orthogonalization and removes spin-plane offsets. Tweaker takes into account on-orbit variations caused by eclipse entry, etc. TW_ZX is used to remove from the z-sensor any spin-tone signals in phase with the x-sensor. TW_ZY is used to remove from the z-sensor any spin-tone signals in phase with the y-sensor. TW_YY is used to make the y-sensor have the same gain as the x-sensor. TW_YX is used to remove from the y-sensor any spin-tone signals in phase with the x-sensor. O_X is used to remove any DC offsets from the x-sensor. O_Y is used to remove any DC offsets from the y-sensor. ", "VAR_TYPE": "support_data", "x_UNITS": "null", "x_LABLAXIS": "tweaker", "x_LABLAXES": [ [ "TW_ZX", "TW_ZY", "TW_YY", "TW_YX", "O_X", "O_Y" ] ] } }, "ts2_l2_mag_16sps_tss_deltaIGRF": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "DeltaIGRF in TSS_adj frame", "COORD_FRAME": "TS2_TSS_adj", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_tss_deltaIGRF", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "deltaIGRF_tss", "LABL_PTR_1": "ts2_l2_mag_16sps_tss_deltaIGRF_labl", "SCALETYP": "linear", "UNITS": "nT", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "Adjustment of IGRF to minimize the background field in TRACERS Spin Sun Adjusted Coordinates. Original TRACERS Spin Sun Coordinates(TSS) are defined as: Z-TSS along the spin-axis; Y-TSS in the direction of Z-TSS cross R-spacecraft-to-Sun; X-TSS completes the right-handed orthogonal set, roughly sunward. TSS_adj is an adjusted coordinate system in which spin axis direction has been corrected to remove spin-tone signals. The residual field is calculated by subtracting IGRF and deltaIGRF from total field to minimize the background field. ", "VAR_TYPE": "support_data", "x_UNITS": "nT", "x_LABLAXIS": "deltaIGRF_tss", "x_LABLAXES": [ [ "Bx", "By", "Bz" ] ] } }, "ts2_l2_mag_16sps_eclipse_flag": { "VarDescription": { "DataType": "CDF_INT1", "NumDims": 0, "NumElements": 1, "PadValue": -127, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Time-Varying Eclipse Flag", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_16sps_eclipse_flag", "FILLVAL": -128, "FORMAT": "I1", "LABLAXIS": "eclipse_flag", "SCALETYP": "linear", "UNITS": "null", "VALIDMAX": 1, "VALIDMIN": 0, "VAR_NOTES": "Eclipse Flag: 1 indicates eclipse; 0 indicates sunlit. ", "VAR_TYPE": "support_data", "x_UNITS": "null", "x_LABLAXIS": "eclipse_flag" } }, "ts2_l2_mag_RotMatGEItoTSS": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 9 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Rotation matrix from GEI2000 to TSS_adj", "DEPEND_0": "ts2_l2_mag_16sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_RotMatGEItoTSS", "FILLVAL": "NaN", "FORMAT": "E12.6", "LABLAXIS": "GEI2TSS", "LABL_PTR_1": "ts2_l2_mag_RotMatGEItoTSS_labl", "SCALETYP": "linear", "UNITS": "null", "VALIDMAX": [ 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 ], "VALIDMIN": [ -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0 ], "VAR_NOTES": "Rotation matrix from GEI2000 to TSS_adj coordinates. The rotation matrix smoothed using cubic spline interpolation through sunlit intervals only.", "VAR_TYPE": "support_data", "x_UNITS": "null", "x_LABLAXIS": "GEI2TSS", "x_LABLAXES": [ [ "GEItoTSS_xx", "GEItoTSS_xy", "GEItoTSS_xz", "GEItoTSS_yx", "GEItoTSS_yy", "GEItoTSS_yz", "GEItoTSS_zx", "GEItoTSS_zy", "GEItoTSS_zz" ] ] } }, "ts2_l2_mag_1sps_epoch": { "VarDescription": { "DataType": "CDF_TIME_TT2000", "NumDims": 0, "NumElements": 1, "PadValue": "0000-01-01T00:00:00.000000000", "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Reference Time for 1sps Orbit Variables. ", "FIELDNAM": "Time since Jan 1, 2000", "FILLVAL": "9999-12-31T23:59:59.999999999", "LABLAXIS": "1sps_epoch", "MONOTON": "INCREASE", "REFERENCE_POSITION": "Rotating Earth Geoid", "SCALETYP": "linear", "TIME_BASE": "J2000", "TIME_SCALE": "Terrestrial Time", "UNITS": "ns", "VALIDMAX": "2029-12-31T23:59:57.999999999", "VALIDMIN": "1990-01-01T00:00:00.000000000", "VAR_NOTES": "Time is specified as a TT2000 variable. Conversion to TT2000 assumes the UTC as given by the data decommutator is correct. ts2_l2_mag_1sps_epoch specified as the median time of the Ephemeris_Epoch timespan.", "VAR_TYPE": "support_data", "x_UNITS": "ns", "x_LABLAXIS": "1sps_epoch" } }, "ts2_l2_mag_1sps_gei2000_pos": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Spacecraft Position in Geocentric Equatorial Inertial Coordinates for Epoch J2000", "COORD_FRAME": "GEI2000", "DEPEND_0": "ts2_l2_mag_1sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_1sps_gei2000_pos", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "pos_gei2000", "LABL_PTR_1": "ts2_l2_mag_1sps_gei2000_pos_labl", "SCALETYP": "linear", "UNITS": "km", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "TRACERS spacecraft position in Geocentric Equatorial Inertial coordinates for Epoch J2000(GEI2000). GEI2000 are defined as: X-GEI2000 aligned with mean equinox for epoch J2000; Z-GEI2000 along the spin axis of the Earth, pointing northward; Y-GEI2000 completes the right-handed orthogonal set. ", "VAR_TYPE": "data", "x_UNITS": "km", "x_LABLAXIS": "pos_gei2000", "x_LABLAXES": [ [ "x", "y", "z" ] ] } }, "ts2_l2_mag_1sps_geo_pos": { "VarDescription": { "DataType": "CDF_REAL8", "DimSizes": [ 3 ], "DimVariances": [ "VARY" ], "NumDims": 1, "NumElements": 1, "PadValue": -1e+30, "RecVariance": "VARY" }, "VarAttributes": { "CATDESC": "Spacecraft Position in Geographic Coordinates ", "COORD_FRAME": "GEO", "DEPEND_0": "ts2_l2_mag_1sps_epoch", "DISPLAY_TYPE": "default_dimension", "FIELDNAM": "ts2_l2_mag_1sps_geo_pos", "FILLVAL": "NaN", "FORMAT": "E12.2", "LABLAXIS": "pos_geo", "LABL_PTR_1": "ts2_l2_mag_1sps_geo_pos_labl", "SCALETYP": "linear", "UNITS": "km", "VALIDMAX": [ 100000.0, 100000.0, 100000.0 ], "VALIDMIN": [ -100000.0, -100000.0, -100000.0 ], "VAR_NOTES": "TRACERS spacecraft position in Geographic Coordinates. 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