{ "startDate": "2015-09-01T00:00Z", "stopDate": "2026-02-03T21:14:32Z", "sampleStartDate": "2026-02-03T21:04:53Z", "sampleStopDate": "2026-02-03T21:09:42Z", "cadence": "PT0.15S", "x_cadence_fraction": 0.8523021210553544, "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/brst/l2/dis-moms/2015/09/mms4_fpi_brst_l2_dis-moms_20150901121114_v3.3.0.cdf. The most common cadence, 150000000 [ns] = PT0.15S, occurred for 85.2302% of the 3295 timesteps. ", "maxRequestDuration": "PT4H50S", "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesM.html#MMS4_FPI_BRST_L2_DIS-MOMS", "contact": "J.Burch; C.Pollock, B.Giles @ SwRI, NASA/GSFC", "resourceID": "https://doi.org/10.48322/vchg-7r51", "additionalMetadata": { "name": "SPASE", "contentURL": "https://spase-metadata.org/NASA/NumericalData/MMS/4/FastPlasmaInvestigation/DIS/Burst/Level2/Moments/PT0.15S.html" }, "parameters": [ { "name": "Time", "type": "isotime", "units": "UTC", "length": 30, "fill": null, "x_description": "Default time", "x_cdf_NAME": "Epoch", "x_cdf_DataType": "CDF_TIME_TT2000" }, { "name": "mms4_dis_errorflags_brst", "type": "double", "x_cdf_DataType": "CDF_UINT4", "description": "MMS4 FPI/DIS 32-bit vector of data-quality indicators at burst-start time. Note: CDF_UINT4 data was converted to HAPI double.", "fill": "4.294967295E9", "units": "(0=Good)", "x_label": "FPI1/DIS 32-bit error flags", "x_cdf_FORMAT": "I10", "x_cdf_FIELDNAM": "MMS4 FPI/DIS dataQuality errorFlags", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_compressionloss_brst", "type": "integer", "x_cdf_DataType": "CDF_UINT1", "description": "---> MMS4 FPI/DIS compression lossless/lossy indicator at survey-start time", "fill": "255", "units": "(0=lossless)", "x_label": "FPI1/DIS compressFlag", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "MMS4 FPI/DIS compression flag", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_steptable_parity_brst", "type": "integer", "x_cdf_DataType": "CDF_UINT1", "description": "---> MMS4 FPI/DIS step table parity, this burst", "fill": "255", "units": "0, 1", "x_label": "FPI1/DIS stepTbl par", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "MMS4 FPI/DIS step table parity", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_startdelphi_count_brst", "type": "integer", "x_cdf_DataType": "CDF_UINT2", "description": "---> MMS4 FPI/DIS Del-Phi (obs spin-phase) count at burst-start time", "fill": "65535", "units": "Count", "x_label": "FPI1/DIS Obs Spin Phase", "x_cdf_FORMAT": "I4.4", "x_cdf_FIELDNAM": "MMS4 FPI/DIS start Del-Phi count", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_startdelphi_angle_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "---> MMS4 FPI/DIS Del-Phi (obs spin-phase) angle at burst-start time", "fill": "-1.0E31", "units": "deg", "x_label": "FPI1/DIS DelPhi ang", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS start Del-Phi angle", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_sector_despinp_brst", "type": "integer", "x_cdf_DataType": "CDF_UINT1", "description": "---> MMS4 FPI/DIS sector de-Spin P value, this burst", "fill": "255", "units": "00-32", "x_label": "FPI1/DIS deSpin P", "x_cdf_FORMAT": "I2.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS sector de-Spin P", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_energyspectr_px_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion energy spectrum \"near\" +X_DSC during this burst", "fill": "-1.0E31", "units": null, "x_label": "FPI1/DIS EnSpectr,+X", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS energySpectr_pX", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 32 ] }, { "name": "mms4_dis_energyspectr_mx_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "---> MMS4 FPI/DIS ion energy spectrum \"near\" -X_DSC during this burst", "fill": "-1.0E31", "units": null, "x_label": "FPI1/DIS EnSpectr,-X", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS energySpectr_mX", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 32 ] }, { "name": "mms4_dis_energyspectr_py_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "---> MMS4 FPI/DIS ion energy spectrum \"near\" +Y_DSC during this burst", "fill": "-1.0E31", "units": null, "x_label": "FPI1/DIS EnSpectr,+Y", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS energySpectr_pY", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 32 ] }, { "name": "mms4_dis_energyspectr_my_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "---> MMS4 FPI/DIS ion energy spectrum \"near\" -Y_DSC during this burst", "fill": "-1.0E31", "units": null, "x_label": "FPI1/DIS EnSpectr,-Y", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS energySpectr_mY", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 32 ] }, { "name": "mms4_dis_energyspectr_pz_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "---> MMS4 FPI/DIS ion energy spectrum \"near\" +Z_DSC during this burst", "fill": "-1.0E31", "units": null, "x_label": "FPI1/DIS EnSpectr,+Z", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS energySpectr_pZ", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 32 ] }, { "name": "mms4_dis_energyspectr_mz_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "---> MMS4 FPI/DIS ion energy spectrum \"near\" -Z_DSC during this burst", "fill": "-1.0E31", "units": null, "x_label": "FPI1/DIS EnSpectr,-Z", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS energySpectr_mZ", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 32 ] }, { "name": "mms4_dis_energyspectr_omni_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS omni-directional ion energy spectrum during this burst", "fill": "-1.0E31", "units": "keV/(cm^2 s sr keV)", "x_label": "DEF_omni", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS energySpectr_omni", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 32 ] }, { "name": "mms4_dis_spectr_bg_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion background energy during this burst", "fill": "-1.0E31", "units": "keV/(cm^2 s sr keV)", "x_label": "DEF_spect_bg", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS spectr_bg", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_numberdensity_bg_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion background number density during this burst", "fill": "-1.0E31", "units": "cm^-3", "x_label": "N_bg", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS background number density", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_numberdensity_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion number density during this burst", "fill": "-1.0E31", "units": "cm^-3", "x_label": "N", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS number density", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_numberdensity_err_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "---> MMS4 FPI/DIS ion number density error during this burst", "fill": "-1.0E31", "units": "cm^-3", "x_label": "N_err", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS number density error", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_densityextrapolation_low_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS estimated (via extrapolation to 0) contribution to density integral below 10eV", "fill": "-1.0E31", "units": "cm^-3", "x_label": "N", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS density extrapolation (low)", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_densityextrapolation_high_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS estimated (via extrapolation to infinity) contribution to density integral above 30keV", "fill": "-1.0E31", "units": "cm^-3", "x_label": "N", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS density extrapolation (high)", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_bulkv_dbcs_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion bulk-velocity DBCS vector during this burst", "fill": "-1.0E31", "units": "km/s", "x_label": [ "Vx_DBCS", "Vy_DBCS", "Vz_DBCS" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS DBCS bulk v", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_bulkv_spintone_dbcs_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion bulk-velocity estimated spintone vector in DBCS during this burst", "fill": "-1.0E31", "units": "km/s", "x_label": [ "Vx_spintone_DBCS", "Vy_spintone_DBCS", "Vz_spintone_DBCS" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS DBCS bulk v spintone", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_bulkv_gse_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion bulk-velocity GSE vector during this burst", "fill": "-1.0E31", "units": "km/s", "x_label": [ "Vx_GSE", "Vy_GSE", "Vz_GSE" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS GSE bulk v", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_bulkv_spintone_gse_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion bulk-velocity estimated spintone vector in GSE during this burst", "fill": "-1.0E31", "units": "km/s", "x_label": [ "Vx_spintone_GSE", "Vy_spintone_GSE", "Vz_spintone_GSE" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS GSE bulk v spintone", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_bulkv_spin_dbcs_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion bulk-velocity spintone vector in DBCS during this burst", "fill": "-1.0E31", "units": "km/s", "x_label": [ "Vx_spin_DBCS", "Vy_spin_DBCS", "Vz_spin_DBCS" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS DBCS bulk v spintone", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_bulkv_spin_gse_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion bulk-velocity spintone vector in GSE during this burst", "fill": "-1.0E31", "units": "km/s", "x_label": [ "Vx_GSE", "Vy_GSE", "Vz_GSE" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS GSE bulk v spintone", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_prestensor_dbcs_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion pressure tensor DBCS matrix during this burst", "fill": "-1.0E31", "units": "nPa", "x_label": "P_DBCS", "x_labelComponents": [ [ "x", "y", "z" ], [ "x", "y", "z" ] ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS DBCS Pres", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3, 3 ] }, { "name": "mms4_dis_prestensor_gse_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion pressure tensor GSE matrix during this burst", "fill": "-1.0E31", "units": "nPa", "x_label": "P_GSE", "x_labelComponents": [ [ "x", "y", "z" ], [ "x", "y", "z" ] ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS GSE Pres", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3, 3 ] }, { "name": "mms4_dis_pres_bg_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion background pressure during this survey", "fill": "-1.0E31", "units": "nPa", "x_label": "DEF_pres_bg", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS pres_bg", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_temptensor_dbcs_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion temperature tensor DBCS matrix during this burst", "fill": "-1.0E31", "units": "eV", "x_label": "T_DBCS", "x_labelComponents": [ [ "x", "y", "z" ], [ "x", "y", "z" ] ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS DBCS Temp Tensor", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3, 3 ] }, { "name": "mms4_dis_temptensor_gse_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion temperature tensor GSE matrix during this burst", "fill": "-1.0E31", "units": "eV", "x_label": "T_GSE", "x_labelComponents": [ [ "x", "y", "z" ], [ "x", "y", "z" ] ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS GSE Temp Tensor", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3, 3 ] }, { "name": "mms4_dis_heatq_dbcs_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion heat-flux DBCS vector during this burst", "fill": "-1.0E31", "units": "mW/m^2", "x_label": [ "Qx_DBCS", "Qy_DBCS", "Qz_DBCS" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS DBCS heatq", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_heatq_gse_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion heat-flux GSE vector during this burst", "fill": "-1.0E31", "units": "mW/m^2", "x_label": [ "Qx_GSE", "Qy_GSE", "Qz_GSE" ], "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI/DIS GSE heatq", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch", "size": [ 3 ] }, { "name": "mms4_dis_temppara_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion parallel temperature during this BP", "fill": "-1.0E31", "units": "eV", "x_label": "eT_para", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI1/DIS tempPara", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mms4_dis_tempperp_brst", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "MMS4 FPI/DIS ion perpendicular temperature during this BP", "fill": "-1.0E31", "units": "eV", "x_label": "eT_perp", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "E12.2", "x_cdf_FIELDNAM": "MMS4 FPI1/DIS tempPerp", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" } ], "x_info_author": "bw", "x_cdaweb_hapi_version": "20260130.0606", "x_info_caching": false, "status": { "code": 1200, "message": "OK" }, "HAPI": "3.2", "x_LastUpdate": "2026-04-12T15:11:44Z" }