How to average images with clouds and ignore these cloud pixels?

[OB SeaDAS - xuanyang02]

Thanks George for pointing out the difference between the average of geophysical parameters and the math average.

Hope I get it right this time --

((chlor_a_M >= 0.0 ? chlor_a_M : 0) +(
chlor_a_D0 >= 0.0 ? chlor_a_D0 : 0) +
(chlor_a_D1 >= 0.0 ? chlor_a_D1 : 0)) /
(((chlor_a_M >= 0.0 ? 1 : 0) +
(chlor_a_D0 >= 0.0 ? 1 : 0) +
(chlor_a_D1 >= 0.0 ? 1 : 0))

If you do Math Band after collocation.

(($1.chlor_a >= 0.0 ? $1.chlor_a : 0) +
($2.chlor_a >= 0.0 ? $2.chlor_a : 0) +
($3.chlor_a >= 0.0 ? $3.chlor_a : 0)) /
(($1.chlor_a >= 0.0 ? 1 : 0) +
($2.chlor_a >= 0.0 ? 1 : 0) +
($3.chlor_a >= 0.0 ? 1 : 0))

if you do Math Band directly on the three bands.

[cassandra21]

Hello! I'm writting to let you know that it worked!

Thank you so much for your help :)