{"HAPI": "3.0", "status": {"code": 1200, "message": "OK"}, "x_dataset": "GR_OPER_TEC2TMS_2F", "x_datasetType": "GR_TECxTMS_2F", "startDate": "2002-04-04T00:00:07Z", "stopDate": "2017-09-04T16:39:12Z", "cadence": "PT10S", "x_maxTimeSelection": "P50D", "modificationDate": "2025-04-28T14:08:17.356Z", "description": "GRACE 2 ionospheric total electron content", "x_dataTerms": "This dataset is provided by the European Space Agency and it is subject to terms condition described in https://vires.services/data_terms.", "resourceURL": "https://swarmhandbook.earth.esa.int/catalogue/GR_TECxTMS_2F", "parameters": [{"name": "Timestamp", "description": "Time of observation, UTC", "units": "UTC", "type": "isotime", "length": 24, "x_standard": "UTC", "x_epoch": "1970-01-01T00:00:00Z", "x_unit": "ms", "x_type": "int64", "fill": null}, {"name": "Latitude", "description": "Position in ITRF - Latitude", "units": "deg", "type": "double", "x_type": "float64", "fill": null}, {"name": "Longitude", "description": "Position in ITRF - Longitude", "units": "deg", "type": "double", "x_type": "float64", "fill": null}, {"name": "Radius", "description": "Position in ITRF - Radius", "units": "m", "type": "double", "x_type": "float64", "fill": null}, {"name": "GPS_Position", "size": [3], "description": "X-,Y-,Z-coordinates of the GPS satellite", "units": "m", "type": "double", "x_type": "float64", "fill": null}, {"name": "LEO_Position", "size": [3], "description": "X-,Y-,Z-coordinates of the LEO satellite", "units": "m", "type": "double", "x_type": "float64", "fill": null}, {"name": "PRN", "description": "Pseudorandom noise (PRN) code of GPS satellite", "units": null, "type": "integer", "x_type": "uint16", "fill": null}, {"name": "L1", "description": "GPS L1C (LA in RINEX v.2.10) carrier phase observation", "units": "m", "type": "double", "x_type": "float64", "fill": null}, {"name": "L2", "description": "GPS L2W (L2 in RINEX v.2.10) carrier phase observation", "units": "m", "type": "double", "x_type": "float64", "fill": null}, {"name": "P1", "description": "GPS C1W (P1 in RINEX v.2.10) code phase observation", "units": "m", "type": "double", "x_type": "float64", "fill": null}, {"name": "P2", "description": "GPS C2W (P2 in RINEX v.2.10) code phase observation", "units": "m", "type": "double", "x_type": "float64", "fill": null}, {"name": "S1_C_N0", "description": "GPS S1 carrier-to-noise density C/N0", "units": "dB-Hz", "type": "double", "x_type": "float64", "fill": null}, {"name": "S2_C_N0", "description": "GPS S2 carrier-to-noise density C/N0", "units": "dB-Hz", "type": "double", "x_type": "float64", "fill": null}, {"name": "Absolute_STEC", "description": "Absolute slant TEC", "units": "TECU", "type": "double", "x_type": "float64", "fill": null}, {"name": "Absolute_VTEC", "description": "Absolute vertical TEC", "units": "TECU", "type": "double", "x_type": "float64", "fill": null}, {"name": "Elevation_Angle", "description": "Elevation Angle", "units": "deg", "type": "double", "x_type": "float64", "fill": null}, {"name": "Relative_STEC", "description": "Relative slant TEC", "units": "TECU", "type": "double", "x_type": "float64", "fill": null}, {"name": "Relative_STEC_RMS", "description": "Root mean square error of relative slant TEC", "units": "TECU", "type": "double", "x_type": "float64", "fill": null}, {"name": "DCB", "description": "GPS receiver differential code bias (DCB) (P2-P1)", "units": "TECU", "type": "double", "x_type": "float64", "fill": null}, {"name": "DCB_Error", "description": "Post fit RMS of the least square system using pairs of mapped slant TEC", "units": "TECU", "type": "double", "x_type": "float64", "fill": null}]}