C2RCC Landsat-8 Processing Parameters

Landsat-8 Processing Parameters

• Valid-pixel expression
  The arithmetic expression defines the pixels which are valid for processing. Pixels which are not valid will be marked as no-data in the target product. For Landsat 8 no default expression is provided. There are multiple way of doing defining an expression. Usually one would want to discriminate between land and water. The expression depends on how the landsat reader is configured.

  By default the values are radiances.
  near_infrared > 0 && near_infrared < 25
  If you have switched to reflectances, the following should work.
  near_infrared > 0 && near_infrared < 0.1
  The exact values might need to be adjusted.

  Alternatively, Idepix can be used for preprocessing and adding a land/water mask, or an elevation band can be added and based on the elevation value land and water can be discriminated. Or the land-sea mask operator can be used.
• Salinity
  The value used as water salinity for the scene.
• Temperature
  The value used as water temperature for the scene.
• Ozone
  The value used as ozone if not provided by auxiliary data.
• Air Pressure
  The surface air pressure at sea level if not provided by auxiliary data.
• Elevation
  The value used as elevation for scene.
• TSM factor bpart
  Conversion factor bpart. (TSM = bpart * TSMfakBpart + bwit * TSMfakBwit)
• TSM factor bwit
  Conversion factor bwit. (TSM = bpart * TSMfakBpart + bwit * TSMfakBwit)
• CHL exponent
  Chlorophyll exponent (CHL = iop-apig^CHLexp * CHLfak)
• CHL factor
  Chlorophyll factor (CHL = iop-apig^CHLexp * CHLfak)
• Threshold rtosa OOS
  Threshold for out of scope of nn training dataset flag for gas corrected top-of-atmosphere reflectances.
• Threshold AC reflectances OOS
  Threshold for out of scope of nn training dataset flag for atmospherically corrected reflectances.
• Threshold for cloud flag on down transmittance @865
  Threshold for cloud test based on downwelling transmittance @865.
• Atmospheric aux data path
  Path to the atmospheric auxiliary data directory. Use either this or the specified products on the I/O Parameters (ozone, air pressure) tab. If the auxiliary data is not available at this path, the data will automatically be downloaded.
• Alternative NN Path
  Path to an alternative set of neuronal nets. Use this to replace the standard set of neuronal nets. This is a parameter which should only used during the development of new neural nets.
• Set of neuronal nets
  Set of neuronal nets for the algorithm. Selectable is either C2RCC_Nets or C2X_Nets.
• Output AC reflectances as rrs instead of rhow
  Write remote sensing reflectances instead of water leaving reflectances.
• Derive water reflectance from path radiance and transmittance
  Alternative way of calculating water reflectance. Still experimental.
• Output gas corrected TOSA reflectances
  Can be enabled to include the TOSA reflectances in the target product.
• Output TOA reflectances
  Add TOA reflectances to the target product.
• Output gas corrected TOSA reflectances
  Add TOSA reflectances to the target product.
• Output gas corrected TOSA reflectances of auto nn
  Add TOSA reflectances of the autoassociative neural net to the target product.
• Output path radiance reflectances
  Add path radiance reflectances to the target product.
• Output downward transmittance
  Add downward transmittance to the target product.
• Output upward transmittance
  Add upward transmittance to the target product.
• Output atmospherically corrected angular dependent reflectances
  Add atmospherically corrected angular dependent reflectances to the target product.
• Output normalized water leaving reflectances
  Add normalized water leaving reflectances to the target product
• Output of out of scope values
  Add out of scope to the target product
• Output of irradiance attenuation coefficients
  Add irradiance attenuation coefficients to the target product
• Output uncertainties
  Add uncertainties to the target product