If you're going to grab MODIS stuff manually anyway, have a look at product 20 -- Chlorophyll fluorescence
. If it's only available for the ocean (which is what it's intended for), can you grab the surface reflectance (product 1B
) for bands 13, 14, and 15 (from which I can manually calculate something resembling fluorescence following the general methods described here
). I think it may be possible, without a ton of work, to cross-calibrate MODIS and OCO fluorescence observations, which would dramatically extend our record. And since these are traditionally ocean bands, I'm pretty sure they don't factor into the GPP algorithm and therefore can be considered independent observations.