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).
OR alternatively (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.
-
'land_flag_ray_conv': Binary land-water mask smoothed onto interval [0,1] using
Rayleigh weighting function.
-
'land_flag_aer_conv': Binary land-water mask smoothed onto interval [0,1] using
aerosol weighting function.
-
'cloud_flag_ray_conv': Binary cloud mask smoothed onto interval [0,1] using
Rayleigh weighting function.
-
'cloud_flag_aer_conv': Binary cloud mask smoothed onto interval [0,1] using
aerosol weighting function.
Flag bands:
MERIS L1 flag band
The coding of the MERIS L1 flags is listed in Table 3.1.
Table 3.1. MERIS L1 flags
| Name | Value | Description |
|---|
| COSMETIC | 1 | Pixel is cosmetic |
| DUPLICATED | 2 | Pixel has been duplicated (filled in) |
| GLINT_RISK | 4 | Pixel has glint risk |
| SUSPECT | 8 | Pixel is suspect |
| LAND_OCEAN | 16 | Pixel is over land, not ocean |
| BRIGHT | 32 | Pixel is bright |
| COASTLINE | 64 | Pixel is part of a coastline |
| INVALID | 128 | Pixel is invalid |
ICOL aerosol retrieval flag band (not for patched N1 file, see
Section 4.1)
The coding of the ICOL aerosol retrieval flags is listed in Table 3.2.
Table 3.2. ICOL aerosol retrieval flags (MERIS)
| Name | Value | Description |
|---|
| bad_aerosol_model | 1 | No appropriate aerosol model could be applied for given pixel |
| bad_aot_model | 2 | No appropriate AOT model could be applied for given pixel |
| high_turbid_water | 4 | Turbidity was identified as high for this pixel |
| sunglint | 8 | Sun glint present in this pixel |
Adjacency effect flag band (only in case of TOA reflectances output)
The coding of the adjacency effect flags is listed in Table 3.3.
Table 3.3. Adjacency effect flags (MERIS)
| Name | Value | Description |
|---|
| ae_mask_rayleigh | 1 | Pixel is inside Rayleigh AE correction mask |
| ae_mask_aerosol | 2 | Pixel is inside aerosol AE correction mask |
| landcons | 4 | Consolidated land pixel |
| cloud | 8 | Cloud pixel |
| ae_applied_rayleigh | 16 | Rayleigh AE correction was applied to this pixel |
| ae_applied_aerosol | 32 | Aerosol AE correction was applied to this pixel |
| alpha_out_of_range | 64 | Alpha value is out of range for this pixel |
| aot_out_of_range | 128 | AOT value is out of range for this pixel |
| high_turbid_water | 256 | Turbidity was identified as high for this pixel |
| sunglint | 512 | Sun glint present in this pixel |
The LANDSAT TM intermediate output products which can be derived using the ICOL+ processor are:
-
Downscaled LANDSAT 5 TM L1 radiances: The LANDSAT 5 TM radiances for bands 1-5 and 7, downscaled to
the AE correction grid.
This product is provided in BEAM DIMAP format. It contains the same bands as the GEOTIFF input
product.
-
Downscaled LANDSAT 7 ETM+ L1 radiances: The LANDSAT 7 ETM+ radiances for bands 1-5, 7 and 8, downscaled to
the AE correction grid.
This product is provided in BEAM DIMAP format. It contains the same bands as the GEOTIFF input
product.
-
AE corrected LANDSAT 5 TM L1 radiances: The LANDSAT 5 TM radiances for bands 1-5 and 7, corrected
for adjacency effect.
This product is provided in BEAM DIMAP format on the AE correction grid.
It contains the same bands as the GEOTIFF input product, plus cloud and land flag bands (see below).
-
AE corrected LANDSAT 7 ETM+ L1 radiances: The LANDSAT 7 ETM+ radiances for bands 1-5 and 7, corrected
for adjacency effect.
This product is provided in BEAM DIMAP format on the AE correction grid.
It contains the same bands as the GEOTIFF input product, plus cloud and land flag bands (see below).
The coding of the cloud classification flag is listed in Table 3.4.
Table 3.4. Cloud classification flags (Landsat TM)
| Name | Value | Description |
|---|
| F_CLOUD | 0 | Pixel was finally specified as cloudy (if all flags below are set)
|
| F_BRIGHT | 1 | Brightness flag (set if TM3 < BT) |
| F_NDVI | 2 | NDVI flag (set if NDVI < NDVIT_CLOUD, with NDVI = (TM4 - TM3)/(TM4 + TM3))
|
| F_NDSI | 4 | NDSI flag (set if NDSI < NDSIT, with NDSI = (TM2 - TM5)/(TM2 + TM5))
|
| F_TEMP | 8 | Temperature flag (set if TM6 < TM6T_CLOUD) |
The coding of the land classification flag is listed in Table 3.5.
Table 3.5. Land classification flags (Landsat TM)
| Name | Value | Description |
|---|
| F_LANDCONS | 0 | Pixel was classified as land |
| F_LOINLD | 1 | Pixel was classified as inland waters (currently no algorithm implemented and set to false)
|
| F_NDVI | 2 | NDVI flag (set if NDVI < NDVIT_LAND, with NDVI = (TM4 - TM3)/(TM4 + TM3))
|
| F_TEMP | 8 | Temperature flag (set if TM6 > TM6T_LAND (summer), TM6 < TM6T_LAND (winter)) |
| F_ICE | 16 | Pixel was classified as ice (currently no algorithm implemented and set to false) |
The LANDSAT TM final output products which can be derived using the ICOL+ processor are:
-
LANDSAT 5 TM L1 radiances: The LANDSAT 5 TM radiances for bands 1-5 and 7 corrected for the
adjacency effect. This product is provided in BEAM DIMAP format. It has the same dimensions and contains the same bands
as the GEOTIFF input product.
-
LANDSAT 7 ETM+ L1 radiances: The LANDSAT ETM+ radiances for bands 1-5, 7 and 8 corrected for the
adjacency effect. This product is provided in BEAM DIMAP format. It has the same dimensions and contains the same bands
as the GEOTIFF input product.