Hello everyone.

I find many MODIS products from websites:http://ladsweb.nascom.nasa.gov/data/
and I want to download MODIS AOD(550nm) products but can't find it through this websites
I wonder someone who knows about it can tell me how and where to download this products, I badly need it
thanks!
I'm looking forword someone who answer it.

This is not a product that we archive, but I believe you
can generate it using SeaDAS.  See the list of l2gen
output products here.

http://oceancolor.gsfc.nasa.gov/DOCS/MSL12/MSl12_prod.html

Regards,
Norman

The AOT550 products is in the MOD04 (Terra) or MYD04(Aqua) L2 product.  If you want level 3 products, check out the MOD08 or MYD08 files.
http://ladsweb.nascom.nasa.gov/data/search.html

The daily aerosol Giovanni instance is also useful:
http://gdata1.sci.gsfc.nasa.gov/daac-bin/G3/gui.cgi?instance_id=aerosol_daily
-Corey

thanks very much!

Dear Norman and Corey:
thanks for give me such wonderful suggestions, now I know how to use and download it.