[Solved]To get the rhow_779nm for MSI using C2RCC


#1

Greetings,

I used the C2RCC processor to make atmospheric correction of S2-MSI, then to retrieve the Chla in Lake IJsselmeer using Gon’s(2005) algorithm, it needs the Rrs at 665nm, 709nm and 779nm, yet no rhow_779 was generated using the C2RCC. I would like to know whether there is a way to obtain that for MSI in C2RCC processor.

Best Regards,
Zhigang


#2

No, there is no rhow at 779 nm.
Sentinel-2 does not have such band. But B7 is at 783nm. You can use it as replacement, I guess.
There is also no band at 709nm, but band B5 is at 705nm.


#3

Sorry for the wrong expressions for the center wavelengths. Yes, I wanna get the rhow at 783, i.e., B7., but it wasn’t generated in C2RCC using the default input parameters.


#4

Actually B7 it is written by default.
Maybe you looked at rhown? There you don’t have it.
image


#5

:joy::joy::joy:
Yes, you are right, I just looked at normalized water leaving radiance.What a careless!
Thanks again.

Regards,
zhigang


#6

Dear Marco,

I re-run the C2RCC by the default, but I did not find the rhow dataset, very strange. BTW, I used the SNAP 6.


#7

Do you have a rrs group instead? Then you haven’t used the defaults.
The screenshot shows the defaults. The red box shows where you can switch between rrs an rhow.


#8

Thanks Macro, it works now. Thanks again.