code: def _viscounts2radiance(counts, slope, offset):
          
          rad = counts * slope + offset
          return rad.clip(min=0)
docs: Convert VIS counts to radiance
  
          References: [VIS]
  
          Args:
              counts: Raw detector counts
              slope: Slope [W m-2 um-1 sr-1]
              offset: Offset [W m-2 um-1 sr-1]
          Returns:
              Radiance [W m-2 um-1 sr-1]