Steradian

{
  "id": "MLC-T-MET-009252",
  "term": "Steradian",
  "field": "Meteorology and atmospheric science",
  "definition": "The standard unit of solid angle, used to describe the two-dimensional angular span in three-dimensional space. A solid angle in steradians is defined as the ratio of the area of a spherical surface patch to the square of the sphere's radius. The entire celestial sphere encompasses a solid angle of 4π steradians, equivalent to approximately 41,253 square degrees.",
  "url": "https://mlchart.com/terminology/meteorology/steradian/"
}