Help with sen2cor and SNAP

Tony · October 24, 2016, 7:02pm

Hello Kraftek,

I was able to follow the steps you provide, but when I run it, I get the following message.

Anybody knows how to solve this? Thanks

ABraun · October 25, 2016, 7:26am

@Mehboobalam: This indicates limited writing authorization. You need to open your command line with administrator rights as stated by kraftek.

ABraun · October 25, 2016, 7:28am

@Tony Can you please post a screenshot of the parameters of sen2cor? You find them under Tools > Manage external tools > sen2cor > edit

Tony · October 25, 2016, 3:05pm

Tony · October 25, 2016, 3:06pm

ABraun · October 25, 2016, 4:57pm

I hope it’s ok that I post the last one from your message

Try to replace the PYTHON_BIN variable (python.exe) with the full path to the executable: C:\Anaconda\python.exe

This helped in many cases when the process was not executed correctly.

Tony · October 25, 2016, 5:30pm

Hi,
I still get the same error. and I put the full path. the full path shows when I click on python.exe. But when I run it I get the same error as before

ABraun · October 25, 2016, 5:32pm

is your installation directory really D:\sen2cor-2.2.1?

Tony · October 25, 2016, 5:37pm

I have it two locations. one in D:\ and another one in the downloads folder.

Tony · October 25, 2016, 5:42pm

This picture shows the path that I specified during the installation.

ABraun · October 25, 2016, 5:56pm

how did you install it?
It is actually under C:\Anaconda\Lib\site-packages\sen2cor-2.2.1-py2.7.egg\sen2cor

Could be that it cannot be found because of this.

What happens when you type L2A_Process in your command line?

Tony · October 25, 2016, 6:00pm

This is what I get as result:

ABraun · October 25, 2016, 6:05pm

that looks fine.
Can you run the tool from the command line?

Just open your command line in the folder where the folder with your S2 data (.safe) is located and type
L2A_Process --resolution 60 nameofthefolder

Tony · October 25, 2016, 7:30pm

Hey again,
here is where I have the sentinel data. what folder should I put on that command?

ABraun · October 25, 2016, 8:06pm

the one which would be one level above. It is created when you extract the data.
But the original path S2A_OPER…safe is needed.

see here, page 40

Tony · October 25, 2016, 8:51pm

Thanks Braun. I went through that pdf.
where do should I specify the path in this picture? (C:\Program Files\Anaconda2\Lib\site-packages\sen2cor-2.2.1-py2.7.egg\sen2cor).

Tony · October 25, 2016, 9:06pm

Could you possibly, explain what this is doing: It is a screenshot from page 40 of the pdf.

Tony · October 25, 2016, 9:56pm

where can I find the L1C Product Directory on my computer?

ABraun · October 26, 2016, 5:17am

this is the directory you download and extract to any folder you want. It is just required to not change the name of the folder

L2A_Process runs the correction from outside SNAP. It however requires a resolution and the name of the folder.

For example:

You download the data in C:\Downloads\name.zip
Then you extract the data here. This creates data in one subfolder wth the data (AUX_DATA…) you showed above. Leave the name as it is: C:\Downloads\S2A_OPER_BWI…
You start the correction from the command line in this folder: C:\Downloads\ like this L2A_Process --resolution 60 S2A_OPER_BWI...
You can recall the total name of the subfolder with the tabulator key so you won’t need to type it in manually.

Tony · October 27, 2016, 2:46pm

Am I doing something wrong here? In specifying the L1C Level directory

I am using windows 7