Subtraction of Mironov complex numbers

[konstantinschellenberg]

Dear Marvin,

Digging deep in the soil models, I found one oddity in the mironov model where you negate the imaginary part prior to assigning it to the complex permittivity. Having skimmed the Mironov papers (2004, 2013) I don't find a physical explanation why there should be a negative value. All the soil permittivites are always positive. See e.g. these interactive Ulaby plots. I'm not totally sure – let's have a discussion about that!

retvod::mironov l. 37$ eps <- complex(real = zepmx, imaginary = -1 * zepmy)

I would suggest

retvod::mironov l. 37$ eps <- complex(real = zepmx, imaginary = zepmy)

Best,
Konstantin

[konstantinschellenberg]

Okay, I was a bit quick of this one I suppose. I found this line the in Ulaby p. 58 tab 2-4:

Still need to find out if this makes a difference. edit: Apparent it does not change anything in the subsequent calculation. I think the formulation ε = ε' - ε'' is correct for lossy media.

Best,
Konstantin