# Gain and offset or Lmin/Lmax Values on metadata images Rapideye

Hi Guys!

Where i can find the Gain and offset in metadata images from Rapideye?

I need the Lmin and Lmax Values in Radience. in the PDF product specification, i found this :

**To convert the Digital Number (DN) of a pixel to radiance it is necessary to multiply the DN value by the****radiometric scale factor. I found the radiometric scale factor, but the value is same for all bands. **

so the values of lmin and lmax are the same for all rapideye bands? not sure if this is correct.

Calculating:

Lmin = Dn minimum possible * Radiometric scale factor = 0

LMax =DNmaximum possible * Radiometric scale factor = 65535 * 0.00999999977 = 655.355 W/m2 sr µm

i'm need this values for atmospheric correction using COST MODEL. I'm using software Idrisi Selva.

Thank you so much!!

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