{ "HAPI": "3.2", "x_description": "High time resolution calibrated waveform data sampled in one of 3 frequency bands in the range 0-577 kHz along one axis using either an electric field antenna or a magnetic search coil sensor. The dataset also includes instrument mode, data quality and the angles required to orient the measurement with respect to the magnetic field and to the GSE coordinate system. ... The Burst Mode (BM) dataset contains the data that has been returned via the main Cluster telemetry system using BM2. The format of the file is the same as the waveform product returned via the dedicated communication link except that there is an additional paramter providing information on the data sampling and bandwidth relevant for the BM2 link. ... CALIBRATION: ... The procedure used in computing the calibrated Electric Field and Magnetic Field values found in this file can be obtained from the document CAA-EST-CR-WBD (Calibration Report of the WBD Measurements in the Cluster Science Archive). In the same document are decribed the procedures to calculate power spectra and to invert the calibration to obtain raw instrument data. ... Bandwidth Sample Rate --------- ------------ 0.1 - 9.5 kHz 27.443 kHz 0.1 - 19 kHz 54.886 kHz 0.7 - 77 kHz 219.544 kHz ... COORDINATE SYSTEM USED: ... The data contain a projection of the electric or magnetic field vector into the direction of the selected receiving antenna (indicated by the Antenna variable). While Bx magnetic antenna points along the spin axis of the spacecraft, antennas Ey, Ez and By are in the spin plane and rotate with spacecraft spin. The instantaneous direction of the antenna in GSE coordinate system can be calculated from the angles in variables Ant_Xgse_Angle and Ant_YZgse_Angle. ... The burst mode file has the same format as the standard WBD waveform with the addition of an additional paramter which describes the details of the mode specification. The paramter can take one of ten values as specified below 0 = Duty Cycled 9.5 kHz, 1-in-3, Sample Rate 27.443 kHz 1 = Duty Cycled 9.5 kHz, 1-in-4, Sample Rate 27.443 kHz 2 = Duty Cycled 19 kHz, 1-in-3, Sample Rate 54.886 kHz 3 = Duty Cycled 19 kHz, 1-in-4, Sample Rate 54.886 kHz 4 = Duty Cycled 77 kHz, 1-in-3, Sample Rate 219.544 kHz 5 = Duty Cycled 77 kHz, 1-in-4, Sample Rate 219.544 kHz 6 = Digital Filtered 9.5 kHz, 1-in-3, roll-off at 3.2 kHz, SR 9.148 kHz 7 = Digital Filtered 9.5 kHz, 1-in-3, optimized roll-off at 4.2 kHz, SR 9.148 kHz 8 = Digital Filtered 9.5 kHz, 1-in-4, roll-off at 2.5 kHz, SR 6.861 kHz 9 = Digital Filtered 9.5 kHz, 1-in-4, optimized roll-off at 3.1 kHz, SR 6.861 kHz ...", "cadence": "PT0.000109S", "parameters": [ { "type": "isotime", "units": "UTC", "name": "time_tags", "description": "UT Time, time of WBD data point", "label": "Universal Time", "length": 29, "fill": null }, { "type": "double", "name": "Bandwidth", "description": "Frequency Bandwidth: 9.5 kHz, 19 kHz, 77 kHz", "label": "Frequency Bandwidth", "units": "kHz", "fill": "-1.0e+31" }, { "type": "double", "name": "Translation", "description": "Base freq. of freq. bandwidth (0.0, 125.454, 250.908, and 501.816 kHz)", "label": "Frequency Shift", "units": "kHz", "fill": "-1.0e+31" }, { "type": "integer", "name": "Resolution", "description": "Number of bits used when digitizing waveform (8-bit, 4-bit, or 1-bit)", "label": "Digital Resolution", "units": "bits", "fill": "-128" }, { "type": "integer", "name": "Antenna", "description": "Antenna (0=Ez, 1=Bx, 2=By, 3=Ey)", "label": "Antenna", "units": null, "fill": "-128" }, { "type": "integer", "name": "Gain", "description": "Gain state of WBD instrument", "label": "Gain", "units": "dB", "fill": "-128" }, { "type": "double", "name": "Ant_B_Field_Angle", "description": "Total angle between antenna used for WBD measurement and measured B field direction", "label": "Antenna-B Field Total Angle", "units": "degrees", "fill": "-1.0E+31" }, { "type": "double", "name": "Ant_Xgse_Angle", "description": "Total angle between the Xgse axis and the antenna direction", "label": "Antenna Xgse Angle", "units": "degrees", "fill": "-1.0E+31" }, { "type": "double", "name": "Ant_YZgse_Plane_Angle", "description": "Total angle between Ygse axis and the projection of the antenna direction in the Ygse-Zgse plane", "label": "Antenna YZgse-Plane Angle", "units": "degrees", "fill": "-1.0e31" }, { "type": "double", "name": "DC_Offset", "description": "DC Offset used when converting from raw digital values to calibrated data", "label": "DC Offset", "units": null, "fill": "-1.0e31" }, { "type": "double", "name": "E", "description": "Calibrated AC WBD Electric Field", "label": "WBD AC Electric Field", "units": "mV/m", "fill": "-1.0e31" }, { "type": "double", "name": "B", "description": "Calibrated AC WBD Magnetic Field", "label": "WBD AC Magnetic Field", "units": "nT", "fill": "-1.0e31" }, { "type": "integer", "name": "Quality", "description": "Data Quality: 0 = OK, 1 = clipped or questionable, 2 = bad data point.", "label": "Data Quality", "units": null, "fill": "-128" }, { "type": "integer", "name": "BM_Mode", "description": "Burst mode configuration (See dataset description for details)", "label": "BM Mode", "units": null, "fill": "-128" } ], "startDate": "2000-11-11T05:00Z", "stopDate": "2024-09-11T07:00Z", "x_tap_url": "https://csa.esac.esa.int/csa-sl-tap/data?retrieval_type=HEADER&DATASET_ID=C3_CP_WBD_WAVEFORM_BM2&FORCEPACK=false", "sampleStartDate": "2019-09-25T04:00Z", "sampleStopDate": "2019-09-25T05:00Z", "x_tap_data_url": "https://csa.esac.esa.int/csa-sl-tap/data?RETRIEVAL_TYPE=product&RETRIEVAL_ACCESS=streamed&DATASET_ID=C3_CP_WBD_WAVEFORM_BM2&START_DATE=2019-09-25T04:00:00.000Z&END_DATE=2019-09-25T05:00:00.000Z", "status": { "code": 1200, "message": "OK" }, "x_LastUpdate": "2026-04-12T15:13:56Z" }