Scale
Turning a band's stored digital numbers into surface reflectance, with each sensor's own scaling.
The scaling tool turns a band's stored digital number into surface reflectance with the sensor's own published scaling: the Sentinel-2 Level-2A offset and quantification value, or the Landsat Collection 2 gain and offset. Anyone computing a spectral index from raw Sentinel-2 or Landsat values needs this step first. One pitfall: Sentinel-2 Level-2A data from processing baseline 04.00 on carry an offset, so reflectance is the digital number minus 1,000, divided by 10,000, and dropping the offset shifts every index.
I want to scale a band to reflectance before computing an index
- Digital number to reflectance
Turns a band's stored digital number into surface reflectance with its sensor's own scaling: the Sentinel-2 Level-2A offset and quantification value, or the Landsat Collection 2 gain and offset.