Double-theodolite observation

{
  "id": "MLC-T-MET-005111",
  "term": "Double-theodolite observation",
  "field": "Meteorology and atmospheric science",
  "definition": "A method for tracking the trajectory of a rising balloon or other atmospheric probe by simultaneously observing it from two separate ground stations. Each station uses a theodolite to measure the azimuth and elevation angles to the target. The intersection of the two lines of sight from the known baseline between the stations provides a precise three-dimensional position of the object, with accuracy dependent on the baseline length and observation synchronization.",
  "url": "https://mlchart.com/terminology/meteorology/double-theodolite-observation/"
}