Another one about test data of MTG:

Size of VIS images is 11136x11136, but satpy creates images of 3712x3712. Somewhere the image is resized? That's not done explicitely in the script I use.

The image itself has a resolution of 3712x3712; the test data contains pixelsets of 3x3 having the same value. Of course, with real MTG-data this will not be the case.

Cheers,

Rob.

On Thu, Aug 25, 2022 at 06:22 AM, R. Alblas wrote:

Size of VIS images is 11136x11136, but satpy creates images of 3712x3712. Somewhere the image is resized? That's not done explicitely in the script I use.

The image itself has a resolution of 3712x3712; the test data contains pixelsets of 3x3 having the same value. Of course, with real MTG-data this will not be the case.

Rob,

I do not think that anything is wrong. According to this document

https://sftp.eumetsat.int/public/folder/UsCVknVOOkSyCdgpMimJNQ/User-Materials/Test-Data/MTG/MTG_FCI_L1C_SpectrallyRepresentative_TD-360_May2022/MTGTD-360%20Spectrally%20Representative%20FCI%20L1C%20Test%20Products%20-%20Package%20Description%20(1290888%20V1).pdf

distributed with the MTI1 test data we have:

• Full images of the (rectified) Earth disk as seen from geostationary orbit over the (0,0)
lat/lon point.
• 16 simulated channels
• 2-D array sizes: 5568x5568 pixels for IR channels and 11136x11136 pixels for VIS-
NIR channels.

If you you take my 'full_scan' of MSG it is resampled GEOS 0° 3712x3712 like MSG4. If you resample native you will probably get 5568x5568 depending on the composite at hand. If you display a single high resolution channel native you should get 11136x11136. In fact that is something you already get as native image of channel 'HRV' of MSG2 or MSG4 ...

Regards,
Ernst