pyrtlib.utils.dilec12

pyrtlib.utils.dilec12(f: ndarray, t: ndarray) → ndarray

Computes the complex dielectric constant for liquid water, with a negative imaginary part representing dissipation.

Complex logarithm is used here. It should be defined with imaginary part in the range -pi to +pi.

Parameters:

• f (numpy.ndarray) – Frequency (GHz)

• t (numpy.ndarray) – Temeprature (K)

Returns:

Dielectric constant for liquid water.

Return type:

numpy.ndarray

References

[1]

Static dielectric constant model from Patek et al. (J.Phys.Chem.Ref.Data. v.38(1), 21 (2009).

[2]

Debye term from W. Ellison, J. Phys. Chem. Ref. Data, 36, 1-18 (2007).

[3]

B band from P.W. Rosenkranz, IEEE Trans. Geosci. & Remote Sens. v.53(3) pp.1387-93 (2015).

Note

validated for 20<f<220 GHz at 248<tk<273; 1<f<1000 GHz at 273<tk<330.