4.3. 'MERIS' Tab Pane

'MERIS' Tab Pane

Figure 4.4. 'MERIS' Tab Pane


This tab pane (Figure 4.4) consists of five subpanels.

4.3.1. 'Product Type Selection' Subpanel

  • 'Compute radiance product', 'Compute rhoToa product': With this radio button group (toggle button), the user can determine whether he wants to write AE corrected radiances or TOA reflectances to the output product.

4.3.2. 'RhoToa Product' Subpanel

  • Bands included in the rhoToa product: With the checkboxes in this subpanel, the user can select additional quantities (as listed inSection 3.2.1) to be written to the output product. Note that the checkboxes are enabled only if 'Compute rhoToa product' was selected above.

4.3.3. 'Processing' Subpanel

  • 'Consider case 2 waters in AE algorithm': With this checkbox the user can select that case 2 waters are considered in the AE correction algorithm.

4.3.4. 'Cloud Top Pressure' Subpanel

  • 'Compute by algorithm', 'Use constant value': With this radio button group (toggle button), the user can determine whether he wants to use a cloud top pressure computed by the algorithm or to use a constant value.
  • 'CTP': A text field to enter the constant cloud top pressure value. The default is 1013 hPa, the valid interval is [0.0, 1013.0]. Note that this textfield is enabled only if 'Use constant value' was selected above.

4.3.5. 'Cloud Mask' Subpanel

  • Cloud product file: Select the cloud product file by pressing the file selection button to invoke a standard file dialog.
  • Mask expression: Define a cloud mask expression by either typing in the text field or by pressing selection button to invoke a standard BEAM expression editor (Figure 4.5). A detailed description how to use this component can be found in the BEAM help (search keyword 'Band Maths Expression Editor'). An expression validity check is performed before the ICOL processing is being started. E.g., if 'xxx' is typed into the text field, an error message as shown in Figure 4.6 will be displayed.
BEAM Band Maths Expression Editor

Figure 4.5. BEAM Band Maths Expression Editor


Cloud mask expression validation: expression invalid.

Figure 4.6. Cloud mask expression validation: expression invalid.