{
  "termsOfUse": "https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf",
  "keywordVersion": "draft",
  "schemeVersion": "2025-07-25",
  "viewer": "https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/instruments/15e3e601-884e-4216-9518-fe37f20db4de",
  "lastModifiedDate": "2026-05-08T17:19:46.556Z",
  "uuid": "15e3e601-884e-4216-9518-fe37f20db4de",
  "prefLabel": "CFH",
  "isLeaf": true,
  "scheme": {
    "shortName": "instruments",
    "longName": "Instruments"
  },
  "broader": [
    {
      "uuid": "c848a856-6210-47c4-b8e3-97427f04a035",
      "prefLabel": "Hydrometers",
      "scheme": {
        "shortName": "instruments",
        "longName": "Instruments"
      }
    }
  ],
  "narrower": [],
  "related": [],
  "definitions": [
    {
      "text": "The Cryogenic Frost Point Hygrometer (CFH) is a balloon-borne hygrometer developed by the University of Colorado. CFH uses the chilled-mirror principle to measure water vapor from the Earth's surface up to the mid-stratosphere. It is more sensitive to water vapor than standard radiosondes, enabling it to measure dew point temperatures with an accuracy of 0.2 K. During the balloon’s flight, CFH collects measurements approximately every 2 seconds, with a vertical resolution of about 50 meters in the troposphere and 100 meters in the stratosphere.",
      "reference": "https://impact.earthdata.nasa.gov/casei/instrument/CFH/"
    }
  ],
  "altLabels": [
    {
      "category": "primary",
      "text": "Cryogenic Frost Point Hygrometer"
    }
  ],
  "resources": []
}