MERIS Level 1 Radiometric Processor - Processor Description |

### Processor Description

#### I/O Parameters Tab

##### Source Product Group

Name: Used to select the spectral source product. The source product shall contain spectral bands providing a source spectrum at each pixel. Use the ... button to open a data product currently not opened in the application.

##### Target Product Group

Name: Used to specify the name of the target product.

Save to: Used to specify whether the target product should be saved to the file system. The combo box presents a list of file formats. If ENVISAT is selected the source product must be in ENVISAT format too.

Open in SNAP: Used to specify whether the target product should be opened in the application. When the target product is not saved, it is opened automatically.

### The Processing Parameters

Perform calibration:
Performs a recalibration of the MERIS data. The coefficients given by the 'Source radiometric correction file' are applied to withdraw the calibration. Afterwards the coefficients of the 'Target radiometric correction file' are applied.

Source radiometric correction file:
A MERIS Auxiliary Data File specifying the coefficients to revert the calibration. Files of the MEGS v9.6 reprocessing can be found at the ESA site MERIS Auxiliary Data Files. As default the "MER_RAC_AXVIEC20050708_135553_20021224_121445_20041213_220000" file is used.

Target radiometric correction file:
A MERIS Auxiliary Data File specifying the coefficients to be applied to the target product. Files of the MEGS v9.6 reprocessing can be found at the ESA site MERIS Auxiliary Data Files. As default the "MER_RAC_AXVACR20091016_154511_20021224_121445_20041213_220000" file is used.

Perform Smile-effect correction:
Enables or disables the correction of the Smile-effect.

Perform equalisation:
Enables or disables the removal of detector-to-detector systematic radiometric differences.

Reprocessing version:
Specifies from which reprocessing the source product comes from. Possible values are AUTO_DETECT, REPROCESSING_2 and REPROCESSING_3. Data from the first processing is not supported.

Perform radiance-to-reflectance conversion:
Perform a conversion from radiance to reflectance values. This can not be selected if ENVISAT is chosen as output format and will be disabled.