Why there is no band9,18 in OLCI after using polymer?

Post Reply
mrzhao
Posts: 2
Joined: Wed Jul 01, 2020 1:26 pm
company / institution: East China Normal University
Location: Shanghai,China

Why there is no band9,18 in OLCI after using polymer?

Post by mrzhao »

Hi,

I used polymer(V4.13) to process the OLCI data, but I found the result did not include band 674,band 761,band 764,band 767,band 885,band 900 and band 940.
I used C2RCC and iCOR to process OLCI before. The results of C2RCC and iCOR also don't include band 761,band 764,band 767,band 900 and band 940. I know the five band affected by atmospheric gaseous absorption. But the results of the Polymer don't include band 674 and band 885. So Why is it?

By browsing previous forum, I found that I can get band 674 and band 885 in following ways:

Code: Select all

run_atm_corr(Level1_OLCI(inputFile),Level2_NETCDF(filename=outputFile),bands_rw=[400,412,443,490,510,560,620,665,674,681,709,754,779,865,885,1020])
Will that affect the result? What do the param: band_oc and band_corr mean?

In addition,Does it make a big difference with or without ancillary data in run_atm_corr

Thanks!
User avatar
fsteinmetz
Site Admin
Posts: 127
Joined: Fri Sep 07, 2018 1:34 pm
company / institution: Hygeos
Location: Lille, France
Contact:

Re: Why there is no band9,18 in OLCI after using polymer?

Post by fsteinmetz »

Hi,

Indeed, specifying bands_rw is the way to go. This does not affect the results at other bands.
band_oc and band_corr are the bands used for atmospheric correction. Changing these bands would affect the results.

Regarding ancillary data: ancillary data are used in all cases. Some sensors, like OLCI, include ancillary data in the level1, so without specifying another ancillary data source, the embedded ones are used. Changing the ancillary data source can have an impact on the results, but not a major one.

Cheers,
François
mrzhao
Posts: 2
Joined: Wed Jul 01, 2020 1:26 pm
company / institution: East China Normal University
Location: Shanghai,China

Re: Why there is no band9,18 in OLCI after using polymer?

Post by mrzhao »

Hi François,

Thank you for your detailed answers to my questions.

Best regards,
Zhao
Post Reply