{
  "HAPI": "3.3",
  "description": "NORSTAR single-beam riometer cosmic noise absorption and raw signal voltage - Churchill, MB, Canada",
  "resourceURL": "https://data.phys.ucalgary.ca/data/datasets/riometers.html",
  "contact": "Emma Spanswick (elspansw@ucalgary.ca)",
  "datasetCitation": "https://doi.org/10.11575/AFYX-M516",
  "x_dataUsage": "This dataset is provided by the University of Calgary and is subject to the data usage and citation policy described at https://data.phys.ucalgary.ca/data/how_to_cite.html",
  "startDate": "1989-03-01T00:00:00Z",
  "stopDate": "2026-08-27T00:00:00Z",
  "cadence": "PT5S",
  "maxRequestDuration": "P31D",
  "sampleStartDate": "2007-12-01T00:00:00Z",
  "sampleStopDate": "2007-12-02T00:00:00Z",
  "geoLocation": [
    -94.09,
    58.76
  ],
  "x_site_uid": "chur",
  "x_site_full_name": "Churchill, MB, Canada",
  "x_descriptionLong": "Cosmic noise absorption and raw signal voltage from the NORSTAR single-frequency single-beam riometer at this site, recorded at 5-second cadence. Riometers measure ionospheric opacity through the absorption of cosmic radio noise. K2 is the baselined data product: absorption is derived by baselining the raw signal, and is the fill value (NaN) where it could not be computed. More information at https://data.phys.ucalgary.ca",
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "fill": null,
      "length": 20
    },
    {
      "name": "absorption",
      "type": "double",
      "units": "dB",
      "fill": "NaN",
      "description": "Cosmic noise absorption, derived from the baselined raw signal"
    },
    {
      "name": "raw_signal",
      "type": "double",
      "units": "V",
      "fill": "NaN",
      "description": "Riometer raw signal voltage"
    }
  ],
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "x_LastUpdate": "2026-08-26T15:06:25Z"
}