#include "arts.h"
#include "matpackI.h"
#include "complex.h"

Functions
Numeric	barometric_heightformula (const Numeric &p, const Numeric &dh)

Numeric	dinvplanckdI (const Numeric &i, const Numeric &f)
	dinvplanckdI More...

void	fresnel (Complex &Rv, Complex &Rh, const Complex &n1, const Complex &n2, const Numeric &theta)
	fresnel More...

Numeric	invplanck (const Numeric &i, const Numeric &f)
	invplanck More...

Numeric	invrayjean (const Numeric &i, const Numeric &f)
	invrayjean More...

Numeric	number_density (const Numeric &p, const Numeric &t)
	number_density More...

Numeric	planck (const Numeric &f, const Numeric &t)
	planck More...

Numeric	rayjean (const Numeric &f, const Numeric &t)
	rayjean More...

Complex	refice_ (const Numeric &wavlen, const Numeric &temp)
	Calculates complex refractive index of Ice 1H. More...

Detailed Description

Author: Patrick Eriksson Patri.nosp@m.ck.E.nosp@m.rikss.nosp@m.on@c.nosp@m.halme.nosp@m.rs.s.nosp@m.e

Date: 2002-05-08

This file contains declerations of functions of physical character.

Definition in file physics_funcs.h.

Function Documentation

◆ barometric_heightformula()

Numeric barometric_heightformula	(	const Numeric &	p,
		const Numeric &	dh
	)

barometric heightformula for isothermal earth atmosphere

Returns: p1 pressure in displacement level [Pa]

Parameters

p	atmospheric pressure at starting level [Pa]
dh	vertical displacement to starting pressure level [m]

Author: Daniel Kreyling

Date: 2011-01-20

Definition at line 70 of file physics_funcs.cc.

References M.

Referenced by cloudboxSetAutomatically().

◆ dinvplanckdI()

Numeric dinvplanckdI	(	const Numeric &	i,
		const Numeric &	f
	)

dinvplanckdI

Calculates the derivative of inverse-Planck with respect to intensity.

Returns: The derivative

Parameters

i	radiance
f	frequency

Author: Patrick Eriksson

Date: 2010-10-26

Definition at line 110 of file physics_funcs.cc.

References BOLTZMAN_CONST, PLANCK_CONST, and SPEED_OF_LIGHT.

Referenced by apply_iy_unit2().

◆ fresnel()

void fresnel	(	Complex &	Rv,
		Complex &	Rh,
		const Complex &	n1,
		const Complex &	n2,
		const Numeric &	theta
	)

fresnel

Calculates complex AMPLITUDE reflection coeffcients for a specular reflection

The properties of the two involved media are given as the complex refractive index, n. A dielectric constant, eps, is converted as n = sqrt( eps ). The power reflection coefficient, r, for one polarisation is r = abs(R)^2.

Parameters

Rv	Out: Reflection coefficient for vertical polarisation
Rh	Out: Reflection coefficient for vertical polarisation
n1	In: Refractive index of medium where radiation propagates
n2	In: Refractive index of reflecting medium
theta	In: Propagation angle from normal of radiation to be reflected

Author: Patrick Eriksson

Date: 2004-09-21

Definition at line 148 of file physics_funcs.cc.

References DEG2RAD.

Referenced by surfaceFlatRefractiveIndex().

◆ invplanck()

Numeric invplanck	(	const Numeric &	i,
		const Numeric &	f
	)

invplanck

Converts a radiance to Planck brightness temperature.

Returns: Planck brightness temperature

Parameters

i	radiance
f	frequency

Author: Patrick Eriksson

Date: 2002-08-11

Definition at line 180 of file physics_funcs.cc.

References BOLTZMAN_CONST, PLANCK_CONST, and SPEED_OF_LIGHT.

Referenced by apply_iy_unit().

◆ invrayjean()

Numeric invrayjean	(	const Numeric &	i,
		const Numeric &	f
	)

invrayjean

Converts a radiance to Rayleigh-Jean brightness temperature.

Returns: RJ brightness temperature

Parameters

i	radiance
f	frequency

Author: Patrick Eriksson

Date: 2000-09-28

Definition at line 214 of file physics_funcs.cc.

References BOLTZMAN_CONST, and SPEED_OF_LIGHT.

Referenced by apply_iy_unit(), apply_iy_unit2(), doit_conv_flagAbsBT(), doit_conv_flagLsq(), doit_i_fieldUpdateSeq1D(), MCGeneral(), and MCIPA().

◆ number_density()

Numeric number_density	(	const Numeric &	p,
		const Numeric &	t
	)

number_density

Calculates the atmospheric number density.

Returns: number density

Parameters

p	pressure
t	temperature

Author: Patrick Eriksson

Date: 2000-04-08

Definition at line 237 of file physics_funcs.cc.

References BOLTZMAN_CONST.

Referenced by abs_coefCalcFromXsec(), abs_xsec_per_speciesAddCIA(), calc_nd_field(), GasAbsLookup::Extract(), vmrunitscf(), and xsec_species_line_mixing_wrapper_with_zeeman().

◆ planck()

Numeric planck	(	const Numeric &	f,
		const Numeric &	t
	)

planck

Calculates the Planck function for a single temperature.

Note that this expression gives the intensity for both polarisations.

Returns: blackbody radiation

Parameters

f	frequency
t	temperature

Author: Patrick Eriksson

Date: 2000-04-08

Definition at line 261 of file physics_funcs.cc.

References BOLTZMAN_CONST, PLANCK_CONST, and SPEED_OF_LIGHT.

Referenced by blackbody_radiationPlanck(), cloud_ppath_update1D_planeparallel(), cloud_RT_no_background(), MatrixCBR(), MatrixPlanck(), MCGeneral(), and MCIPA().

◆ rayjean()

Numeric rayjean	(	const Numeric &	f,
		const Numeric &	t
	)

rayjean

Converts a Rayleigh-Jean brightness temperature to radiance

Returns: radiance

Parameters

tb	RJ brightness temperature
f	frequency

Author: Patrick Eriksson

Date: 2011-07-13

Definition at line 293 of file physics_funcs.cc.

References BOLTZMAN_CONST, and SPEED_OF_LIGHT.

◆ refice_()

Complex refice_	(	const Numeric &	wavlen,
		const Numeric &	temp
	)

Calculates complex refractive index of Ice 1H.

Valid range for wavelengths is between 45 nm and 8.6 m. For wavelengths above 167 microns, temperature dependence is included for temperatures between 213 and 272K. Mainly intended for applications in Earth ice clouds and snow, not other planets or interstellar space; the temperature dependence or crystalline form of ice may be incorrect for these latter applications.

Authors of Fortran function:
Stephen Warren, Univ. of Washington (1983)
Bo-Cai Gao, JCESS, Univ. of Maryland (1995)
Warren Wiscombe, NASA Goddard (1995)

References:
Warren, S., 1984: Optical Constants of Ice from the Ultraviolet to the Microwave, Appl. Opt. 23, 1206-1225

Kou, L., D. Labrie, and P. Chylek, 1994: Refractive indices of water and ice in the 0.65- to 2.5-micron spectral range, Appl. Opt. 32, 3531-3540

Perovich, D., and J. Govoni, 1991: Absorption Coefficients of Ice from 250 to 400 nm, Geophys. Res. Lett. 18, 1233-1235

Parameters

[in]	wavlen	Wavelength in microns
[in]	temp	Temperature in Kelvin

Returns: Refractive index as complex number

Functions

Detailed Description

Function Documentation

◆ barometric_heightformula()

◆ dinvplanckdI()

◆ fresnel()

◆ invplanck()

◆ invrayjean()

◆ number_density()

◆ planck()

◆ rayjean()

◆ refice_()