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Why are the fill values and scaling factors of Landsat Collection 2 Level-2 products different from those products in Collection 1?

The fill values and scale factors of Landsat Collection 2 Level-2 products were updated to be consistent with that of Landsat Collection 2 Level-1 data, while using the unsigned integer data type more efficiently. 

As shown in the table below, the fill value of the Surface Reflectance and Surface Temperature bands were changed from “-9999” in Collection 1, to “0” in Collection 2 to be consistent with the Level-1 data (digital numbers).  

The updated multiplicative scale factors, along with the additive scale factors, provide a full range of physical values based on the valid range allowed by data type. 

 

Fill values and scale factors for Landsat Collection 1 and Collection 2 Level-2 products
  Surface Reflectance Surface Reflectance Surface Temperature Surface Temperature
  Collection 1 Collection 2 Collection 1 Collection 2
Fill Value -9999 0 -9999 0
Scaling Factor 0.0001 0.0000275 + -0.2 0.1 0.00341802 +149.0
Data Type Signed 16-bit integer Unsigned 16-bit integer Signed 16-bit integer Unsigned 16-bit integer

 

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