Dear Huang Farong,
I analyzed your simulation. I noted:
- Your simulation contains a folder "input" that contains a folder "input". It shoiuld not be the case. Indeed, I do not know which is the correct folder "input".
- your simulation uses the database "Lanbertian.db". This is not a database provided by DART. It seems that you grouped spectra from the DART vegetation and mineral databases inside it. Usually, we create new databases of optical properties if we use spectra that are not in the provided DART databases of optical properties. Anyway, this cannot be a source of error if the database is correctly created.
Can you resend your simulation after removing the incorrect folder "input" and adding the database "lambertian.db"?
Sincerely
DART Team