Rather than distribute geolocation files, which are as large as the L1A files themselves, we distribute the attitude and ephemeris files from which geolocation can be generated. The way seadas is currently set-up, you must have the appropriate att/eph files in the appropriate directory, and then you can run:
to get the geolocation and L1B files required for processing to L2. You can check the HELP button for the above processes for further instruction. The tricky part is getting the right att/eph files into the right place so seadas can find them. They are all available from: ftp://oceans.gsfc.nasa.gov/MODISA/ATTEPH/
or in monthly tarball form from: ftp://samoa.gsfc.nasa.gov/seadas/seadas/
in files called seadas_modisae*.tar.gz. If you grab a tarball and extract it into the top-level seadas directory, the files will go into the correct seadas subdirectory, which is:
seadas/data/modisnpp/atteph/yyyy/ddd/ where yyyy and ddd are the year and day number
This may seem a little cumbersome, but the advantage is that you don't need to store geolocation files, which are large (and may change), or L1B files, which WILLchange as the calibration evolves. In production, we regenerate geolocation and L1B every time we reprocess an L1A to L2, and then we discard the GEO and L1B files.
I have talked to the SeaDAS lead (Mark) and he will work on providing some instruction on the website for this process.
P.S.: Nicolai Tesla is alive and well, and living in a Volcano in South America.