L2 coccolith flag?

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lisenik
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L2 coccolith flag?

by lisenik » Fri Feb 06, 2026 6:25 pm America/New_York

Have someone ever seen the description of level2 flags? What are the criteria to put them? I am especially interested in coccolith flag. I cannot find it online. I would appreciate if someone can point me in the right direction.
Upd. I have found a piece of code in src/l2gen/setflags.c that defines it, but still there are questions.
What are these constants? Where do they come from?
141 c1 = input->coccolith[0];
142 c2 = input->coccolith[1];
143 c3 = input->coccolith[2];
144 c4 = input->coccolith[3];
145 c5 = input->coccolith[4];
146 c6 = input->coccolith[5];
147 c7 = input->coccolith[6];
148 c8 = input->coccolith[7];

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OB.DAAC - SeanBailey
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Re: L2 coccolith flag?

by OB.DAAC - SeanBailey » Mon Feb 23, 2026 11:27 am America/New_York

The coccolithophore flag is based on work from Chris Brown, and was originally described in Chapter 3 of Volume 28 of the SeaWiFS pre-launch technical memoranda series: https://oceancolor.gsfc.nasa.gov/images/resources/seawifs/PreLVol28.pdf

The coefficients were updated in 2000 and was documented in Chapter 7 of Volume 9 of the SeaWiFS post-launch series: https://oceancolor.gsfc.nasa.gov/images/resources/seawifs/PLVol9.pdf

They haven't changed since.

Sean

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