Transponder

{
  "id": "MLC-T-MET-010820",
  "term": "Transponder",
  "field": "Meteorology and atmospheric science",
  "definition": "An electronic device that receives an interrogation signal and automatically transmits a response. In meteorology, transponders are often carried by radiosondes or aircraft to provide position and identification information to ground-based radar systems. Aircraft transponders, for example, respond to secondary surveillance radar interrogations by sending back a coded signal containing altitude and identification data.",
  "url": "https://mlchart.com/terminology/meteorology/transponder/"
}