Potential refractive index

{
  "id": "MLC-T-MET-010678",
  "term": "Potential refractive index",
  "field": "Meteorology and atmospheric science",
  "definition": "A conservative atmospheric property that describes the refractive index an air parcel would have if brought adiabatically to a standard reference pressure, typically 1000 millibars. This index accounts for changes in density due to temperature and pressure variations, providing a more stable measure of radio wave propagation characteristics. It is expressed in N-units, where one N-unit corresponds to a change of 10^-6 in the refractive index.",
  "see_also": [
    "potential refractivity"
  ],
  "url": "https://mlchart.com/terminology/meteorology/potential-refractive-index/"
}