Mirror nephoscope

{
  "id": "MLC-T-MET-007318",
  "term": "Mirror nephoscope",
  "field": "Meteorology and atmospheric science",
  "definition": "An instrument used to determine the direction and speed of cloud movement by observing their reflection in a horizontal mirror. The mirror typically has a compass rose or grid etched on its surface, allowing an observer to track the apparent motion of clouds relative to fixed points. This device was historically used for cloud observations before the advent of radar and satellite technology.",
  "synonyms": [
    "reflecting nephoscope",
    "cloud mirror"
  ],
  "url": "https://mlchart.com/terminology/meteorology/mirror-nephoscope/"
}