Altimeter

{
  "id": "MLC-T-MET-000118",
  "term": "Altimeter",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "An instrument used to measure altitude, primarily by sensing changes in atmospheric pressure. Most altimeters are aneroid barometers calibrated to display height above a reference level, such as sea level or a specific airport elevation. Radar altimeters, in contrast, measure height above the terrain directly beneath the aircraft.",
    "An instrument that indicates the altitude of an object above a fixed level. Pressure altimeters use an aneroid barometer with a scale graduated in altitude instead of pressure."
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/altimeter/"
}