The equation of SS aerosol reflectance to MS aerosol reflectance
The equation of SS aerosol reflectance to MS aerosol reflectance
We want to convert the OLCI SS aerosol reflectance to MS aerosol reflectance using the equation in aerosol.c as follows.
lnrhoas = log(rhoas[iw]*aeroob(sensorID,iw,cf,wv))
rhoa[iw] = exp(a + b*lnrhoas + c*lnrhoas*lnrhoas);
I have a few questions.
(1) for the OLCI images, can I set aeroob(sensorID,iw,cf,wv) =1?
(2) If aeroob(sensorID,iw,cf,wv)=1, I use aerosol_olci_r80f00v01.hdf to test this process. When solz=27.5, senz=7.66769, phi=15, and wavelength=400 nm, the values of acost?bcost and ccost are0.838569,0.850478, and 0.0152793. Do the values of acost, bcost, and ccost represent a,b and c in the above equation?
(3) If it is true. When rhoas_400 =0.01, the calculation result of rhoa_400 is 0.006225. The MS aerosol reflectance is lower than SS serosol reflectance. Where am I wrong?
Thank you very much.
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The equation of SS aerosol reflectance to MS aerosol reflectance
> (1) for the OLCI images, can I set aeroob(sensorID,iw,cf,wv) =1?
You could, or you could implement the correction from aerosol.c using the coefficients in $OCDATAROOT/olci/msl12_sensor_info.dat
> (2) If aeroob(sensorID,iw,cf,wv)=1, I use aerosol_olci_r80f00v01.hdf to test this process. When solz=27.5, senz=7.66769, phi=15, and wavelength=400 nm, the values of acost?bcost and ccost are0.838569,0.850478, and 0.0152793. Do the values of acost, bcost, and ccost represent a,b and c in the above equation?
Yes, acost, bcost and ccost are the coeffiicients for the MS>SS quadratic equation
> (3) If it is true. When rhoas_400 =0.01, the calculation result of rhoa_400 is 0.006225. The MS aerosol reflectance is lower than SS serosol reflectance. Where am I wrong?
Don't know :sad:
Sean
The equation of SS aerosol reflectance to MS aerosol reflectance
Thank you for your replying. It really helps.
Best Wishes
Ge