I use L1C data with SNAP.
I want detailed information on what kind of processing was performed on L1C data.
Please tell me the site because I could not find it.
Hi,
I think this link will help you:
https://sentinel.esa.int/web/sentinel/user-guides/sentinel-2-msi/processing-levels/level-1
1 Like
As well as the User Guide page identified by @obarrilero there is also the Technical Guide content:
https://sentinel.esa.int/web/sentinel/technical-guides/sentinel-2-msi/level-1c-processing
Cheers
Jan
S2 MPC Operations Manager
Thank you for your reply!
I understand the details!
Is the image of L1C not corrected for atmosphere?
Level-1C is top of atmosphere reflectance
Level-2A is bottom of atmosphere reflectance
Is L2A better if I want to get information on the water surface?
if you want to use multiple images, L2A gives you more comparable data.
Multiple images?
Sorry, I didn’t understand you intentions.
if you want to compare images of different dates, it is advisable to use the calibrated L2A products because their information is corrected for atmospheric conditions.
I understand.
Thank you for the polite explanation.
Is there a site other than this site that can get L2A data for free?
Copernicus Open Access Hub
https://scihub.copernicus.eu/dhus/#/home
L2A data will be progressively provided by ESA, but not every scene is already processed.
More information: https://earth.esa.int/web/sentinel/missions/sentinel-2/news/-/article/update-of-copernicus-sentinel-2-level-1c-and-level-2a-processing-baselines
Besides that, you can process L2A products from L1C with sen2cor.
Why doesn’t the process start when I press Run?
you have to install both the plugin and the bundles. Please have a look at the instructions here: Sen2cor (detailled instructions)
about [#5. Create SEN2COR_HOME]
Does folder mean creating a folder named SEN2COR_HOME?
I did so, but couldn’t run Sen2Cor.
no, SEN2COR_HOME is just the name of the variable pointing to the directory where sen2cor is installed.
So what is a new folder?
please specify your question.