Problem RADtoREF


#1

Hi guys! I’m working on some landsat images but their values are only about radiance (I need reflectance)… I tried the function Radiance-to-Reflectance but in return I have only errors.
Someone help me please…thans guys


#2

In Landsat only raw values are stored. In the metadata are coefficients given to compute radiance or reflectance values. By default we provide the radiances. You can set a property to get the reflectances.
I’ve explained how to do it in this post:


#3

Good Morning and thank you for the answer…
can You please explain how to do these steps precisely?

  1. in this folder create a file (what kind of file?) named s3tbx.properties.
    2)To this file add the follwoing line: s3tbx.landsat.readAs=reflectance

Thank you very much, sorry but I am not so used to this program.


#4

Just a plain text file with the name. And it should contain this line.


#5

See that is what I found in that folder…Is it the same if I create a new folder and inside that the text file? (because I can’t create a text file directly…I’m only allowed to create a new folder)

Thank you very much!!!


#6

You need to create this file with admin rights.
But you can also do it in

C:\Users\<USER_DIR>\.snap\etc

There you can create the file without admin rights. Maybe it already exists.


#7

Yes, the folder already exists but the name is ‘s2tbx.properties’… is it the same? or do I create a new one?


#8

No, create a new one.
The s2tbx.properties file is for the Sentinel-2 Toolbox and the s3tbx.properties for the Sentinel-3 Toolbox.