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CNES / RadiativeTransferCode-OSOAA

Ocean Successive Orders with Atmosphere - Advanced (OSOAA) : Accurate computation of the radiative tranfer into the Ocean-Atmosphere system including polarisation, coupling terms, and the agitated surface.
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Mueller Matrix vs. Legendre #13

Closed lucasbarbedo83 closed 1 year ago

lucasbarbedo83 commented 1 year ago

OSOAA calculates Legendre from Mueller Matrix. How can I have the inverse calculation: Mueller Matrix from Legendre (i.e., alpha, beta, gamma,Zeta) In other words: PM_PHYTO.TXT to HYD_MOD.TXT.

See a example of PM_PHYTO.TXT RADIATIVE PROPERTIES OF PARTICLES

EXTINCTION CROSS SECTION (mic^2) : 0.69804E+01 SCATTERING CROSS SECTION (mic^2) : 0.49895E+01 ASYMMETRY FACTOR (no truncation) : 0.99798E+00 MEAN PARTICULES ALTITUDE/DEPTH (m) : -999.000 VOLUME OF A MEAN PARTICULE (mic^3) : -0.99900E+03 MEAN REFRACTIVE INDEX (real part) : -999.0000 TRUNCATION COEFFICIENT : 1.97529 SINGLE SCATTERING ALBEDO (truncation): 0.03004

PHASE MATRIX COEFFICIENTS FOR K=0 TO 80 ALPHA(K) BETA11(K) GAMMA12(K) ZETA(K) 0.00000000E+00 0.10000000E+01 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.25090898E+01 0.00000000E+00 0.00000000E+00 0.43286400E+01 0.34467669E+01 -0.24962208E+00 0.41430265E+01

blafranc commented 1 year ago

Dear Lucas,

I understand you want to get the phase functions defined in the Mueller matrix (as a function of the scattering angle), rather than the Greek coefficients of their expansions in Legendre functions.

The phase functions are available in the logfiles. Use the keyword -HYD.Log to get the logfile associated to the calculation of the optical properties of hydrosols (it will be created in the Advanced_Output repository). Track "HYDROSOL COMPUTATIONS: RESULTS" in the file to find the section with this data.

Bruno

lucasbarbedo83 commented 1 year ago

Yes! I found it. Perfect. Thank you!