SNAPPY: Command to retrieve pixel values

Dear all,

I am working on SYN L2 product and especially on the AOT550. On python, using SNAPPY, my objective is to retrieve all values (T550, SAA, SZA, air pressure) of the pixels in my product or at least of a single pixel. I am looking for the command line to achieve it (similar to Pixel Extraction on SNAP).

Thanks everyone,