Radiometric calibration with SNAP
From AWF-Wiki
(Difference between revisions)
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| − | * Download a Sentinel-2 Level 1C tile from ESA's Copernicus Open Access Hub web service as a compressed | + | * Download a Sentinel-2 Level 1C tile from ESA's Copernicus Open Access Hub web service as a compressed zip file: [[Downloading Sentinel-2 images]]. |
* Start SNAP Desktop. | * Start SNAP Desktop. | ||
* {{mitem|text=File --> Open Product...}}. Browse to the zip archive or drag and drop the file from the Windows file explorer into the SNAP tab Product Explorer. | * {{mitem|text=File --> Open Product...}}. Browse to the zip archive or drag and drop the file from the Windows file explorer into the SNAP tab Product Explorer. | ||
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[[File:snap_sen2cor_params.png|400px]] | [[File:snap_sen2cor_params.png|400px]] | ||
| − | * Check '''Display | + | * Check '''Display execution report''' on. {{button|text=Run...}} |
* Compare Output Product with Original Product. Mark the Original Product Name in Product Explorer Right Click {{mitem|text=Open RGB Image Window --> Sentinel-2 MSI Natural Colors}}. {{button|text=OK}}. Repeat for the Output Product. | * Compare Output Product with Original Product. Mark the Original Product Name in Product Explorer Right Click {{mitem|text=Open RGB Image Window --> Sentinel-2 MSI Natural Colors}}. {{button|text=OK}}. Repeat for the Output Product. | ||
* {{mitem|text=Window --> Tile horizontally}} | * {{mitem|text=Window --> Tile horizontally}} | ||
Revision as of 09:35, 11 November 2020
- Download a Sentinel-2 Level 1C tile from ESA's Copernicus Open Access Hub web service as a compressed zip file: Downloading Sentinel-2 images.
- Start SNAP Desktop.
- File --> Open Product.... Browse to the zip archive or drag and drop the file from the Windows file explorer into the SNAP tab Product Explorer.
- Optical --> Thematic Land Processing --> Sen2Cor Processor --> Sen2Cor 280
- Specify the Processing Parameters:
A first run will be made with 60m pixel resolution (takes ca. 5-10 minutes). Topographic normalization is activated with DEM correction: TRUE. For DEM directory specify a folder where dem files are stored.
- Check Display execution report on. Run...
- Compare Output Product with Original Product. Mark the Original Product Name in Product Explorer Right Click Open RGB Image Window --> Sentinel-2 MSI Natural Colors. OK. Repeat for the Output Product.
- Window --> Tile horizontally
- Check View --> Synchronize Image Cursors and View --> Synchronize Image Views. Zoom and Pan.
- Activate a map view by clicking into the canvas of the Original Product. Click Mask Manager tab on the right.
- Check the mask layers opaque_clouds and cirrus_clouds in the Mask Manager.
- Click into the map canvas of the Ouput Product. Click Mask Manager tab on the right.
- Check the mask layers scl_cloud_shadow, scl_cloud_medium_proba, scl_cloud_high_proba, scl_thin_cirrus in the Mask Manager.
- For second run choose in Processing Parameters: Spatial Resolution: 10 (m). Be patient, processing takes some time ...
