Converting AOT to visibility

I would like to perform atmospheric correction with sen2cor, using in situ measured AOT values instead of relying on the DDV algorithm. I learned that this can be done by setting the “Visibility” parameter to the desired value, and setting “VIS_Update_Mode” to 0 in the L2A_GIPP.xml file. But the problem is that I have measured AOT values, not visibility. How to convert AOT values to visibility?