3.2. Output Products

3.2.1. MERIS

The MERIS L1c output products which can be derived using the ICOL+ processor are:
  • MERIS L1c radiances: The MERIS radiances for bands 1-15 corrected for the adjacency effect. This product can be retrieved in either original .N1 format or BEAM DIMAP format (user option).
  • MERIS L1c TOA reflectances: AE corrected radiances for bands 1-15 converted to TOA reflectances. This product is provided in BEAM DIMAP format. Within this product, the following quantities are optionally provided (user option):
    • TOA reflectances (bands 1-15) corrected for AE (Rayleigh part of correction only)
    • TOA reflectances (bands 1-15) corrected for AE (Rayleigh and aerosol parts of correction)
    • AE Rayleigh correction term (bands 1-15)
    • AE aerosol correction term (bands 1-15)
    • Angstrom coefficient and aerosol optical thickness at 865nm.

3.2.2. LANDSAT

The LANDSAT TM output products which can be derived using the ICOL+ processor are:
  • LANDSAT TM L1c radiances: The LANDSAT TM radiances for bands 1-5 and 7 corrected for the adjacency effect. This product is provided in BEAM DIMAP format. It contains the same bands as the GEOTIFF input product.
  • LANDSAT TM L1g radiances: The LANDSAT TM radiances for bands 1-7 downscaled to the AE correction grid. This product is provided in BEAM DIMAP format. Processing time can be saved if this product is computed once and then re-used as input for different AE correction processes with varying user options.
  • LANDSAT TM L1g flag bands: The LANDSAT TM cloud and land classification flags as used for the AE correction (i.e. downscaled to the AE correction grid). This product is provided in BEAM DIMAP format.

    The coding of the cloud classification flag is listed in the following table:

    Table 3.1. Cloud classification flags

    NameValueDescription
    F_CLOUD0Pixel was finally specified as cloudy (if all flags below are set)
    F_BRIGHT1Brightness flag (set if TM3 < BT)
    F_NDVI2NDVI flag (set if NDVI < NDVIT_CLOUD, with NDVI = (TM4 - TM3)/(TM4 + TM3))
    F_NDSI4NDSI flag (set if NDSI < NDSIT, with NDSI = (TM2 - TM5)/(TM2 + TM5))
    F_TEMP8Temperature flag (set if TM6 < TM6T_CLOUD)


    The coding of the land classification flag is listed in the following table:

    Table 3.2. Land classification flags

    NameValueDescription
    F_LANDCONS0Pixel was classified as land
    F_LOINLD1Pixel was classified as inland waters (currently no algorithm implemented and set to false)
    F_NDVI2NDVI flag (set if NDVI < NDVIT_LAND, with NDVI = (TM4 - TM3)/(TM4 + TM3))
    F_TEMP8Temperature flag (set if TM6 > TM6T_LAND (summer), TM6 < TM6T_LAND (winter))
    F_ICE16Pixel was classified as ice (currently no algorithm implemented and set to false)