{ "startDate": "1969-01-30T14:50:12Z", "stopDate": "1983-12-30T15:19:33Z", "sampleStartDate": "1983-12-30T15:18:48Z", "sampleStopDate": "1983-12-30T15:19:17Z", "cadence": "PT0.033S", "x_cadence_fraction": 0.9944382647385984, "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/isis/ionogram_cdf/isis1/all/1969/030/i1_av_all_1969030145012_v01.cdf. The most common cadence, 33 [ms] = PT0.033S, occurred for 99.4438% of the 894 timesteps. ", "maxRequestDuration": "PT1450S", "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesI.html#I1_AV_ALL", "contact": "R.F. Benson @ NASA GSFC", "resourceID": " ", "additionalMetadata": { "name": "SPASE", "contentURL": "https://spase-metadata.org/NASA/NumericalData/ISIS1/SFS/Ionogram/PT29S.html" }, "parameters": [ { "name": "Time", "type": "isotime", "units": "UTC", "length": 24, "fill": null, "x_description": "Time", "x_cdf_NAME": "Epoch", "x_cdf_DataType": "CDF_EPOCH" }, { "name": "ampl", "type": "integer", "x_cdf_DataType": "CDF_UINT1", "description": "IONOGRAM: continuous-film display of color-coded relative amplitude (0-255) on ionogram time (x) vs. apparent range from satellite down (y) grid", "fill": "-128", "units": " ", "x_label": "Relative Amplitude", "x_cdf_FORMAT": "I3", "x_cdf_FIELDNAM": "Relative Amplitude", "x_cdf_DISPLAY_TYPE": "default_dimensionmax_panel_time>90000", "x_cdf_DEPEND_0": "Epoch", "size": [ 335 ], "bins": [ { "name": "v_height", "description": "virtual height corresponding to delay time", "centers": [ 0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 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Sounder frequency in MHz (incl. fixed and swept frequency parts) - ONLY positively identified frequencies are shown", "fill": "-1.0E31", "units": "MHz", "x_label": "Sounder Freq.", "x_format": ".2e", "x_fractionDigits": "2", "x_cdf_FORMAT": "e11.2", "x_cdf_FIELDNAM": "interpolated frequencies", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "swept_start", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Scan line number of start of swept portion (before is fixed portion)", "fill": "-2147483648", "units": " ", "x_label": "swept_start", "x_cdf_FORMAT": "I5", "x_cdf_FIELDNAM": "start of swept portion", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mergedFH", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Electron Gyrofrequency in MHz", "fill": "-1.0E31", "units": "MHz", "x_label": "Electron Gyrofrequency", "x_format": ".3f", "x_fractionDigits": "3", "x_cdf_FORMAT": "f7.3", "x_cdf_FIELDNAM": "Electron Gyrofrequency", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "height", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "ORBIT PARAMETERS: Satellite altitude in km", "fill": "-1.0E31", "units": "km", "x_label": "Altitude", "x_format": ".1f", "x_fractionDigits": "1", "x_cdf_FORMAT": "f7.1", "x_cdf_FIELDNAM": "height", "x_cdf_DISPLAY_TYPE": "default_dimension", "x_cdf_DEPEND_0": "Epoch" }, { "name": "lat", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Latitude (-90 to 90) in degree", "fill": "-1.0E31", "units": "deg", "x_label": "Latitude", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f7.2", "x_cdf_FIELDNAM": "latitude)", "x_cdf_DEPEND_0": "Epoch" }, { "name": "lon", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Longitude (-180 to 180) in degree", "fill": "-1.0E31", "units": "deg", "x_label": "Longitude", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f7.2", "x_cdf_FIELDNAM": "longitude)", "x_cdf_DEPEND_0": "Epoch" }, { "name": "GMLAT", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Geomagnetic latitude in degree", "fill": "-1.0E31", "units": "deg", "x_label": "Geomag Lat", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f7.2", "x_cdf_FIELDNAM": "geom latitude", "x_cdf_DEPEND_0": "Epoch" }, { "name": "GMLONG", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Geomagnetic longitude (-180 to 180) in degree", "fill": "-1.0E31", "units": "deg", "x_label": "Geomag Long", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f7.2", "x_cdf_FIELDNAM": "geom longitude", "x_cdf_DEPEND_0": "Epoch" }, { "name": "DIP", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Magnetic inclination (Dip angle of magnetic field direction) in degrees", "fill": "-2147483648", "units": "deg", "x_label": "Dip", "x_cdf_FORMAT": "i3", "x_cdf_FIELDNAM": "magnetic inclination", "x_cdf_DEPEND_0": "Epoch" }, { "name": "INV_LAT", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Invariant latitude in degree", "fill": "-1.0E31", "units": "deg", "x_label": "Inv Lat", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f7.2", "x_cdf_FIELDNAM": "inv latitude", "x_cdf_DEPEND_0": "Epoch" }, { "name": "L", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- L shell (McIlwain parameter)", "fill": "-1.0E31", "units": " ", "x_label": "L", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f7.2", "x_cdf_FIELDNAM": "L shell (McIlwain parameter)", "x_cdf_DEPEND_0": "Epoch" }, { "name": "CHI", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Solar zenith angle in degree", "fill": "-2147483648", "units": "deg", "x_label": "Sol Zenith Ang", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f7.2", "x_cdf_FIELDNAM": "Solar Zenith Angle", "x_cdf_DEPEND_0": "Epoch" }, { "name": "LMT", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Local Mean Time (LMT) in decimal hours", "fill": "-1.0", "units": "hour", "x_label": "LMT", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "F6.2", "x_cdf_FIELDNAM": "Local Mean Time in decimal hours", "x_cdf_DEPEND_0": "Epoch" }, { "name": "GMLMT", "type": "double", "x_cdf_DataType": "CDF_REAL4", "description": "-- Geomagnetic Local Time in decimal hours", "fill": "-1.0", "units": " ", "x_label": "Geomag LT", "x_format": ".2f", "x_fractionDigits": "2", "x_cdf_FORMAT": "f6.2", "x_cdf_FIELDNAM": "Geomagnetic Local Time", "x_cdf_DEPEND_0": "Epoch" }, { "name": "sun", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Spacecraft in(=1)/out(=2) sunlight ", "fill": "-2147483648", "units": " ", "x_label": "In sun (1) out(2)", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "spacecraft in/out sunlight", "x_cdf_DEPEND_0": "Epoch" }, { "name": "satellite", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "CODES & MODES: Satellite-ID: 1=Alouette-1, 2=Aloutte-2, 3=ISIS-1, 4=ISIS-2", "fill": "-2147483648", "units": " ", "x_label": "1-A1, 4-I2", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "satellite ID", "x_cdf_DEPEND_0": "Epoch" }, { "name": "station_id", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Telemetry station ID (nn) (https://nssdc.gsfc.nasa.gov/space/isis/isis-table1-new.html", "fill": "-2147483648", "units": " ", "x_label": "Tel. station", "x_cdf_FORMAT": "I2", "x_cdf_FIELDNAM": "telemetry station code", "x_cdf_DEPEND_0": "Epoch" }, { "name": "power_code", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Transmitter power code: 1=Prim(400W) 2=Sec(400W)", "fill": "-2147483648", "units": " ", "x_label": "Transm P Code", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "transmitter power code", "x_cdf_DEPEND_0": "Epoch" }, { "name": "sr_code", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Sounder/receiver code: 0 = off, 1 = on", "fill": "-2147483648", "units": " ", "x_label": "S&R 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "sounder/receiver code", "x_cdf_DEPEND_0": "Epoch" }, { "name": "pps_code", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Pulses per second code: 0 = 30 pps, 1 = 60 pps ", "fill": "-2147483648", "units": " ", "x_label": "0/1 = 30/60 pps", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "pulse per second code", "x_cdf_DEPEND_0": "Epoch" }, { "name": "DMODE", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- DMODE (transmitter on/off for alternate frame pairs): 0 = off, 1 = on", "fill": "-2147483648", "units": " ", "x_label": "DMODE 0-off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "DMODE code", "x_cdf_DEPEND_0": "Epoch" }, { "name": "GMODE", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- GMODE (transmission of alternate frames of swept and fixed frequency): 0 = off, 1 = on", "fill": "-2147483648", "units": " ", "x_label": "GMODE: 0-off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "GMODE code", "x_cdf_DEPEND_0": "Epoch" }, { "name": "mixed_mode", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- MMODE (sounder mixed mode): 0 = off, 1 = on", "fill": "-2147483648", "units": " ", "x_label": "MMODE: 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "sounder mixed mode", "x_cdf_DEPEND_0": "Epoch" }, { "name": "fix_freq", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Fixed frequency code: 0=off, 1=0.25, 2=0.48, 3=1.00, 4=1.95, 5=4.00, 6=9.303 MHz", "fill": "-2147483648", "units": " ", "x_label": "fixed_freq_code", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "fixed frequency code (0-6)", "x_cdf_DEPEND_0": "Epoch" }, { "name": "CEP", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Cylindrical Electrostatic Probe (CEP) on(1)/off(0)", "fill": "-2147483648", "units": " ", "x_label": "CEP 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "Cyl. Electrost. Probe", "x_cdf_DEPEND_0": "Epoch" }, { "name": "VLF", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- VLF (0.05-30 kHz) instrument on(1)/off(0)", "fill": "-2147483648", "units": " ", "x_label": "VLF 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "0.05-30 kHz VLF receiver", "x_cdf_DEPEND_0": "Epoch" }, { "name": "SEA", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Spherical Electrostatic Analyzer on(1)/off(0)", "fill": "-2147483648", "units": " ", "x_label": "SEA 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "Spherical Electrostatic Analyzer", "x_cdf_DEPEND_0": "Epoch" }, { "name": "IMS1", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Ion Mass Spectrometer 1 on(1)/off(0)", "fill": "-2147483648", "units": " ", "x_label": "IMS-1 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "Ion Mass Spectrometer 1", "x_cdf_DEPEND_0": "Epoch" }, { "name": "IMS2", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Ion Mass Spectrometer 2 on(1)/off(0)", "fill": "-2147483648", "units": " ", "x_label": "IMS-2 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "Ion Mass Spectrometer 2", "x_cdf_DEPEND_0": "Epoch" }, { "name": "SPS", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Soft Particle Spectrometer on(1)/off(0)", "fill": "-2147483648", "units": " ", "x_label": "SPS 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "Soft Particle Spectrometer", "x_cdf_DEPEND_0": "Epoch" }, { "name": "EPD", "type": "integer", "x_cdf_DataType": "CDF_INT4", "description": "-- Energetic Particle Detector on(1)/off(0)", "fill": "-2147483648", "units": " ", "x_label": "EPD 0=off", "x_cdf_FORMAT": "I1", "x_cdf_FIELDNAM": "Energetic Particle Detector", "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": "2026-04-12T15:10:16Z" }