Clear line of sight

{
  "id": "MLC-T-MET-004331",
  "term": "Clear line of sight",
  "field": "Meteorology and atmospheric science",
  "definition": "An unobstructed path between an observer or instrument and a target, allowing for direct visual or electromagnetic wave propagation. In meteorological remote sensing, this path must be free from intervening obstacles like terrain, buildings, or dense atmospheric phenomena that would block or scatter the signal. For example, a ground-based weather radar requires a clear line of sight to accurately measure precipitation at a distance.",
  "abbreviation": "CLOS",
  "see_also": [
    "cloud-free line of sight"
  ],
  "url": "https://mlchart.com/terminology/meteorology/clear-line-of-sight/"
}