l2gen for MSIS2 with NIR/SWIR method
Posted: Tue Jul 16, 2019 4:11 am America/New_York
Hello!
I'm running l2gen in Seadas 7.5.3 to process Sentinel-2 images. I want to use the NIR/SWIR method as I'm working in shallow waters and for the default AC option I retrieved weird Rrs values (either negatives or higher than 1) even for the band at 665nm.
This is how my command line looks like:
l2gen ifile=/home/laura/Desktop/Glenan/Glenan2019/S2B_MSIL1C_20190709T112119_N0208_R037_T30TVT_20190709T131959.SAFE/manifest.safe ofile=/home/laura/Desktop/Glenan/Glenan2019/Seadas/20190709bis.nc l2prod='Rrs rhos' brdf_opt=0 aer_opt=-9 aer_swir_short=1613 aer_swir_long=2200 aer_wave_short=740 aer_wave_long=865 cirrus_opt=false cloud_thresh=0.018 cloud_wave=2130.0 maskhilt=0
I'm using center wavelengths detailed in Pahlevan et al 2017 (Sentinel-2 MultiSpectral Instrument (MSI) data processing for aquatic science applications: Demonstrations and validations). However, I get this error:
Processing scan # 0 (1 of 5490) after 32 seconds
Aerosol selection bands 739 and 864
Aerosol selection bands 1613 and 2200 not available for this sensor
There is a problem in my command line? or NIR/SWIR correction is not available for MSIS2?
Also, in an old post from last year it says that it's not possible to obtain 10m resolution pixel from seadas (https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?pid=40047;hl=sentinel%2010m) but all the bands are resampled to 20m. I wonder if something changed in new releases of Seadas.
Many thanks!
cheers,
Laura
I'm running l2gen in Seadas 7.5.3 to process Sentinel-2 images. I want to use the NIR/SWIR method as I'm working in shallow waters and for the default AC option I retrieved weird Rrs values (either negatives or higher than 1) even for the band at 665nm.
This is how my command line looks like:
l2gen ifile=/home/laura/Desktop/Glenan/Glenan2019/S2B_MSIL1C_20190709T112119_N0208_R037_T30TVT_20190709T131959.SAFE/manifest.safe ofile=/home/laura/Desktop/Glenan/Glenan2019/Seadas/20190709bis.nc l2prod='Rrs rhos' brdf_opt=0 aer_opt=-9 aer_swir_short=1613 aer_swir_long=2200 aer_wave_short=740 aer_wave_long=865 cirrus_opt=false cloud_thresh=0.018 cloud_wave=2130.0 maskhilt=0
I'm using center wavelengths detailed in Pahlevan et al 2017 (Sentinel-2 MultiSpectral Instrument (MSI) data processing for aquatic science applications: Demonstrations and validations). However, I get this error:
Processing scan # 0 (1 of 5490) after 32 seconds
Aerosol selection bands 739 and 864
Aerosol selection bands 1613 and 2200 not available for this sensor
There is a problem in my command line? or NIR/SWIR correction is not available for MSIS2?
Also, in an old post from last year it says that it's not possible to obtain 10m resolution pixel from seadas (https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?pid=40047;hl=sentinel%2010m) but all the bands are resampled to 20m. I wonder if something changed in new releases of Seadas.
Many thanks!
cheers,
Laura