According to copernicus.eu, Sentinel 1 operates on C-Band whose wavelength ranges from 37.5 to 75 mm. Also I have noticed using the value 31.1 mm in displacement equation according to this thread
And another user in the same thread is seemingly operating on Sentinel 1 data , has typed the wavelength value 5.6 cm into the equation
So which is exact wavelength value should I manually type?
I hope I am not asking a repetitive question