Merging L3b Aqua and Viirs

treble · by **treble** » Thu Aug 10, 2017 2:30 pm America/New_York

Aqua and Viirs Chl seem to agree pretty well. So I was thinking of merging the two datasets in order to get better spatial coverage. What would be the best way to do that be?
In the L3b files the mean Chl is calculated for each bin as: sum/weights.
So I was thinking of calculating a mean merged Chl as: (sum Chl Aqua + sum Chl Viirs) / (sum weights Aqua + sum weights Viirs).
Does that sound ok?
Thanks,

by **OB.DAAC - SeanBailey** » Thu Aug 10, 2017 5:51 pm America/New_York

We are still mulling over a plan to do this "operationally", but until we do you can simply use l3bin to bin the Aqua and VIIRS L3b_{period}_CHL files together.

Sean

gnwiii · by **gnwiii** » Fri Aug 11, 2017 8:09 am America/New_York

For the sake of others interested in merged products, ESA CCI Ocean Colour has:

"The ESA Ocean Colour CCI (OC-CCI) project is pleased to announce the release of version 3.1 of the OC-CCI product comprising of globally merged MERIS, Aqua-MODIS, SeaWiFS and VIIRS data with associated per-pixel uncertainty information. This is an update of the version 3.0 product that:

- Extends the dataset to the end of 2016
- Includes the NASA released MODIS-Aqua data (R2014.0.1), which is applicable from the 9th June 2014 onwards"

treble · by **treble** » Mon Aug 14, 2017 7:10 pm America/New_York

Thanks for the replies. The ESA product looks interesting indeed. Thanks for the tip.