pyarts3.arts.physics.refractive_index_water_visible_nir_harvey98

physics.refractive_index_water_visible_nir_harvey98(frequency: object, temperature: object, density: object, check_validity: bool = True) → object
physics.refractive_index_water_visible_nir_harvey98(frequency: object, temperature: object, density: object, check_validity: bool = True) → object

Real refractive index of water and steam in the visible and near infrared.

Implements Harvey et al. (1998), “Revised Formulation for the Refractive Index of Water and Steam as a Function of Wavelength, Temperature and Density”. The function broadcasts scalar and array inputs using NumPy rules.

Parameters:

  • frequency (Numeric or numpy.ndarray) – Frequency [Hz].

  • temperature (Numeric or numpy.ndarray) – Temperature [K].

  • density (Numeric or numpy.ndarray) – Water mass density [kg/m3].

  • check_validity (bool, optional) – Enforce the published ranges: 261.15 K < temperature < 773.15 K, 0 kg/m3 < density < 1060 kg/m3, and 0.2 micrometres < wavelength < 1.9 micrometres.

Returns:

n – Real refractive index.

Return type:

Numeric or numpy.ndarray