Robin sphere

{
  "id": "MLC-T-MET-008594",
  "term": "Robin sphere",
  "field": "Meteorology and atmospheric science",
  "definition": "A rigid, metalized, inflatable balloon used to measure high-altitude wind speed and direction. Deployed from a sounding rocket, the sphere inflates at a designated altitude and is then tracked by ground-based radar as it descends through the atmosphere. Its observed trajectory and drift provide data on atmospheric winds at altitudes between 30 and 100 kilometers, a region difficult to probe with other direct methods.",
  "url": "https://mlchart.com/terminology/meteorology/robin-sphere/"
}