Re: [GRASS-user] R: R: R: NULL values as output of i.atcorr

On 28/01/22 10:55, ilaria.ferrand...@gmail.com wrote: Thank you Moritz, I will do some research on visibility (aerosol model concentration) to put a reasonable value there (any suggestion is appreciated, also regarding references to look at). The man page suggests

[GRASS-user] R: R: R: NULL values as output of i.atcorr

Thank you Moritz, I will do some research on visibility (aerosol model concentration) to put a reasonable value there (any suggestion is appreciated, also regarding references to look at). How can I transform digital number into radiance/reflectance? Thank you very much for your precious help!

[GRASS-user] R: R: R: R: NULL values as output of i.atcorr

Thank you very much Vero for your kind answer and for sharing the presentation, which for sure will result very useful! Da: Veronica Andreo Inviato: venerdì 28 gennaio 2022 14:50 A: Moritz Lennert Cc: Pilafin ; Maris Nartiss ; GRASS user list Oggetto: Re: [GRASS-user] R: R: R: NULL

Re: [GRASS-user] R: R: R: NULL values as output of i.atcorr

Dear Ilaria, If you use Level 2A data, you do not need to do atmospheric correction. The products are already corrected and the only thing you need to do, if you want floating point data, is to rescale reflectances with the equation indicated by Moritz. Optionally removing the overshoots by

[GRASS-user] R: R: R: R: NULL values as output of i.atcorr

Thank you very much for your support! I will keep you update on my (I hope) progresses! -Messaggio originale- Da: Moritz Lennert Inviato: venerdì 28 gennaio 2022 12:07 A: ilaria.ferrand...@gmail.com; 'Maris Nartiss' Cc: 'GRASS user list' Oggetto: Re: R: R: R: [GRASS-user] NULL values