py6S Cloud flag automation (longer term)

[oceancolorcoder]

Use py6S modeled Es comparison to flag for cloud as an L2 Met option

[oceancolorcoder]

AD to capture Es_mod as a new group (“py6S”?) at L1B. This will also contain the direct/diffuse ratio for use in L2 to eliminate the need to re-run py6S. DA will then propagate the new group to include filters and implement the cloud flag as another experimental Met filter in L1BQC. Nils has used mod/meas relative difference of 20% in the past (multispectral)

[AlexisDeru]

I created the "PY6S_MODEL" group (see PR #146) that contains :

• diffuse_ratio
• direct_ratio
• py6s_irradiance
  Each variable comes with the associated wavelengths. there is a few NaN in the irradiance given by Py6S, I do not know why yet.

[oceancolorcoder]

Py6S is currently only being run for FRM-Full. Any effort to use modeled Es to help build a cloud flag could only be applied in this regime unless 6S was run in the other regimes.

[oceancolorcoder]

6S now propagated to L2 for all regimes with ffeb94a

Experimentation and implementation of 6S-based cloud flag is longer-term goal.