The Level-3 MODIS Atmosphere Daily Global Product contains roughly 600 statistical datasets that are derived from approximately 80 scientific parameters from four Level-2 MODIS Atmosphere Products: Aerosol, Water Vapor, Cloud, and Atmosphere Profile. There are two MODIS Daily Global data product files: MOD08_D3, containing data collected from the Terra platform; and MYD08_D3, containing data collected from the Aqua platform. (cited from MOD08_D3 Atmosphere Daily Global Product)
MODIS MOD08 Angstrom Exponent Land Minimum with VMAP0 coastlines overlayed (LatLong/WGS84; date: 2003-10-27; click to enlarge)
Or see the same map in QGIS.
I am grateful to Andrey Kiselev and Frank Warmerdam for their infinite patience and willingness to implement the HDF driver into GDAL as well as the appropriate warp routines.