Earthdata Forum

Hi, I uploaded sentinel-3 images over a three year period (2019, 2020 and 2021). Then on the Snap software, I clipped my study area (Raster-Subset), selected the parameters I needed (CHL, TSM, ADG and KD 490). I now want to aggregate the images and calculate the average to get 12 images from January to December for each year and export my data to get maps like the image for each parameter?

You can use l2bin and then l3mapgen in SeaDAS --

https://seadas.gsfc.nasa.gov/help-8.2.0/processors/ProcessL2bin.html
https://seadas.gsfc.nasa.gov/help-8.2.0/processors/ProcessL3mapgen.html

OK thanks for your answer.
Only that in practice I struggle a bit would there be a dedicated tutorial

For image aggregation you can either use the SeaDAS-OCSSW processors (l2bin, l3mapgen), or you can use the general tool: Mosaic Tool (SeaDAS > Menu > Raster > Geometric Operations > Mosaicking)

There isn't a lot of OCSSW tutorials at the moment but this may help:
https://seadas.gsfc.nasa.gov/help-8.2.0/OcsswCookbook/ocsswCookbook.html

We do plan to make more tutorials in the future.

Here is the help for Mosaic -- https://seadas.gsfc.nasa.gov/help-8.2.0/desktop/Mosaic.html

and cookbook examples -- https://seadas.gsfc.nasa.gov/help-8.2.0/GptCookbook/gptCookbookMosaic.html