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Hi there,

If you have OCSSW installed on your machine, then I believe the PIC LUT file you are looking for is located in the path $OCSSWDATAROOT/share/common and will be called "calcite_table.txt" (or similar).

Hi Heidi,

Thanks for clarifying. It sounds like the issue lies in the QAA code that you have developed separate to OCSSW. Unfortunately, I can't provide specific assistance on individual IOP code implementations.

Lachlan

Hi Heidi, To help me understand a little better, can you please advise which L3 files you are seeing negative values in? You will see missing data (that may appear as negative values when loaded) on daily L3 products where data are masked out due to land, clouds, ice, sunglint contamination, and orb...

Hi Cedric,

The at-launch PACE ATBD for spectral Kd is located at the NASA Earthdata Algorithm Publication Tool (APT): https://doi.org/10.5067/E6JP5Z1CGRFT).

This is where we will record the PACE ATBDs for bio-optics (IOP and Kd) products moving forward.

Cheers,
Lachlan

Hi Cortivo, The code looks correct to me. In l2gen's function chl_oci, chl_hu (per Hu et al 2012) is denoted as chl1 and chl_ocx (band ratio) is denoted as chl2. The decision point in the function chl_oci that selects chl_hu, chl_ocx, or a blend of the two, is dependent only the magnitude of chl_hu ...

Hi Toru,

I agree that as per the QAA v5/v6 documentation, the reflectance terms in lines 241-242 and 327-328 probably should be sub-surface and not above-water reflectances. I shall look into this further.

Best regards,
Lachlan

Don - I've been working with Tess to get ocssw built on an old CentOS machine. Looks like I shared the wrong version of opt/src. I think we're getting closer to this building properly now. I will contact you directly with further detail.

Cheers,
Lachlan

Hi Bruce,I usually run my code on a linux box, however, I have a previously compiled version of ocssw on my mac that works successfully.For my version of l2gen, which I built back in October, I get the following when I run "otool -L $OCSSWROOT/bin/l2gen": @rpath/libhdf5_hl.10.2.1.dylib (co...

Hi Sunanda,Unfortunately, it is hard to diagnose an issue without further information. Specifically:(1) what is the L1A file you are analyzing (file name, date, ___location, sensor)(2) what values are "missing" and from which bands?(3) which file has missing values (distributed L2 file, or th...

Hi Marjan,This is a challenging question to answer as there are a number of different PFT algorithms out there. All I can do is recommend you consult the literature. The following paper is probably a good starting point:Mouw et al. 2017. A Consumer's Guide to Satellite Remote Sensing of Multiple...