Reading Sentinel-3 data
Sentinel-3 data from Copernicus Open Access Hub could be easily read in SNAP.
Last updated
Sentinel-3 data from Copernicus Open Access Hub could be easily read in SNAP.
Last updated
Sentinel-3 L1 EFR (OL_1_EFR) downloaded from .
To open data: File > Import > Optical Sensors > Sentinel-3 >Sentinel-3. Select *.xml file
To visualize data: Window > New RGB window > Select one of the profiles
To export data: File > Export > GeoTIFF / BigTIFF. Click Subset... button, change the spatial subset and select at least 3 bands (e.g. 8-6-4 for RGB). Export file.
Open the output file in QGIS. The georeferencing is wrong. Original *.nc files are not georeferenced either.
GDAL can read NetCDF files as arrays. We read all the bands and store them to dict with band names.
Sentinel-3 georeference info is stored in the geo_coordinates.nc
file, which contains 2D latitude and longitude grids.
GCP object consists of list of geocoordinates with corresponding pixel coordinates
Custom function for saving array to GeoTIFF
The full notebook download is below. To run it, , savethe notebook to your working directory, and run jupyter notebook from this directory.
Every file is read as 2D array with no geotransformation.
You can see that the coordinates gradient is not parallel to the image sides. This means, that it is not possible to produce a GDAL line. For this case, we can create a GDAL GCP object to warp the image with it.