Inelastic Scattering API

InelasticScattering defines Raman/Cabannes mode types and helper routines used by the inelastic source paths in CoreRT.

Mode Types

vSmartMOM.InelasticScattering.AbstractRamanType Type

type AbstractRamanType

Abstract Raman type

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vSmartMOM.InelasticScattering.noRS Type

noRS(; kwargs...)
noRS{FT}(; kwargs...)

Pure elastic-scattering mode. This mode carries no inelastic redistribution state and is the default Raman type used by rt_run(model). The untyped keyword constructor infers FT from supplied floating-point arrays and falls back to Float64 when no typed arrays are provided.

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vSmartMOM.InelasticScattering.noRS_plus Type

noRS_plus(; kwargs...)
noRS_plus{FT}(; kwargs...)

Concatenated-grid pure elastic-scattering mode used by plus-mode code paths that share the Raman interface but do not include inelastic redistribution. The untyped keyword constructor infers FT from supplied floating-point inputs and falls back to Float64 when no typed inputs are provided.

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vSmartMOM.InelasticScattering.RRS Type

struct RRS{FT<:AbstractFloat}

A struct which defines Rotational Raman Scattering parameters

Fields

• n2: Molecular Constants for N2

• o2: Molecular Constants for O2

• greek_raman: Greek coeffs in Raman calculations

• fscattRayl: Pre-computed optical properties

• ϖ_Cabannes

• ϖ_λ₁λ₀

• i_λ₁λ₀

• Z⁻⁺_λ₁λ₀

• Z⁺⁺_λ₁λ₀

• i_ref

• n_Raman

• bandSpecLim

• iBand

• F₀

• SIF₀

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vSmartMOM.InelasticScattering.VS_0to1 Type

struct RRS{FT<:AbstractFloat}

A struct which defines Rotational Raman Scattering parameters

Fields

• n2: Molecular Constant for N2

• o2: Molecular Constant for O2

• greek_raman: Greek coefs in Raman calculations

• fscattRayl: Pre-computed optical properties

• ϖ_Cabannes

• ϖ_λ₁λ₀

• i_λ₁λ₀

• Z⁻⁺_λ₁λ₀

• Z⁺⁺_λ₁λ₀

• dτ₀

• dτ₀_λ

• k_Rayl_scatt

• n_Raman

• F₀

• SIF₀

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vSmartMOM.InelasticScattering.VS_1to0 Type

struct RRS{FT<:AbstractFloat}

A struct which defines Rotational Raman Scattering parameters

Fields

• n2: Molecular Constant for N2

• o2: Molecular Constant for O2

• greek_raman: Greek coefs in Raman calculations

• fscattRayl: Pre-computed optical properties

• ϖ_Cabannes

• ϖ_λ₁λ₀

• i_λ₁λ₀

• Z⁻⁺_λ₁λ₀

• Z⁺⁺_λ₁λ₀

• dτ₀

• dτ₀_λ

• k_Rayl_scatt

• n_Raman

• F₀

• SIF₀

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vSmartMOM.InelasticScattering.VS_0to1_plus Type

struct RRS{FT<:AbstractFloat}

A struct which defines Rotational Raman Scattering parameters

Fields

• bandSpecLim: Concatenated indices of band limits

• iBand

• grid_in

• n2: Molecular Constant for N2

• o2: Molecular Constant for O2

• greek_raman: Greek coefs in Raman calculations

• greek_raman_VS_n2

• greek_raman_VS_o2

• fscattRayl: Pre-computed optical properties

• ϖ_Cabannes

• ϖ_λ₁λ₀

• i_λ₁λ₀

• Z⁻⁺_λ₁λ₀

• Z⁺⁺_λ₁λ₀

• ϖ_λ₁λ₀_VS_n2

• i_λ₁λ₀_VS_n2

• Z⁻⁺_λ₁λ₀_VS_n2

• Z⁺⁺_λ₁λ₀_VS_n2

• ϖ_λ₁λ₀_VS_o2

• i_λ₁λ₀_VS_o2

• Z⁻⁺_λ₁λ₀_VS_o2

• Z⁺⁺_λ₁λ₀_VS_o2

• i_λ₁λ₀_all

• i_ref

• n_Raman

• F₀

• SIF₀

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vSmartMOM.InelasticScattering.VS_1to0_plus Type

struct RRS{FT<:AbstractFloat}

A struct which defines Rotational Raman Scattering parameters

Fields

• bandSpecLim: Concatenated indices of band limits

• iBand

• grid_in

• n2: Molecular Constant for N2

• o2: Molecular Constant for O2

• greek_raman: Greek coefs in Raman calculations

• greek_raman_VS_n2

• greek_raman_VS_o2

• fscattRayl: Pre-computed optical properties

• ϖ_Cabannes

• ϖ_λ₁λ₀

• i_λ₁λ₀

• Z⁻⁺_λ₁λ₀

• Z⁺⁺_λ₁λ₀

• ϖ_λ₁λ₀_VS_n2

• i_λ₁λ₀_VS_n2

• Z⁻⁺_λ₁λ₀_VS_n2

• Z⁺⁺_λ₁λ₀_VS_n2

• ϖ_λ₁λ₀_VS_o2

• i_λ₁λ₀_VS_o2

• Z⁻⁺_λ₁λ₀_VS_o2

• Z⁺⁺_λ₁λ₀_VS_o2

• i_λ₁λ₀_all

• i_ref

• n_Raman

• F₀

• SIF₀

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Molecular and Source Helpers

vSmartMOM.InelasticScattering.compute_γ_air_Cabannes! Function

compute_γ_air_Cabannes!(λ₀, rs_or_n2, [o2])

Compute the effective Cabannes Greek coefficient γ and elastic Cabannes fraction for an air mixture at wavelength λ₀ in nm.

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vSmartMOM.InelasticScattering.compute_γ_air_Rayleigh! Function

compute_γ_air_Rayleigh!(λ₀, rs_or_n2, [o2])

Compute the effective Rayleigh Greek coefficient γ and Rayleigh cross section for an air mixture at wavelength λ₀ in nm.

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vSmartMOM.InelasticScattering.compute_σ_Rayl_coeff! Function

compute_σ_Rayl_coeff!(mol)

Update the molecular Rayleigh cross-section prefactor stored on mol.

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vSmartMOM.InelasticScattering.compute_σ_Rayl_VibRaman_coeff_hires! Function

compute_σ_Rayl_VibRaman_coeff_hires!(T, mol; Jmax=30)

Update high-resolution Rayleigh and vibrational Raman transition prefactors over rotational levels up to Jmax.

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vSmartMOM.InelasticScattering.compute_σ_VibRaman_coeff! Function

compute_σ_VibRaman_coeff!(T, mol; vmax=2, Jmax=30)

Update Stokes and anti-Stokes vibrational Raman cross-section prefactors for mol at temperature T.

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vSmartMOM.InelasticScattering.apply_lineshape! Function

apply_lineshape!(Δνᵢ, σᵢ, λ₀, Δν_out, σ_out, pressure, temperature, molMass; wavelength_flag=false)

Broaden discrete Raman transitions onto Δν_out, writing cross sections into σ_out for incident wavelength λ₀.

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vSmartMOM.InelasticScattering.compute_energy_levels! Function

compute_energy_levels!(mol; vmax=2, Jmax=30)

Populate molecular vibrational/rotational energy levels in cm⁻¹ for v = 0:vmax and J = 0:Jmax.

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vSmartMOM.InelasticScattering.compute_stellar_Rayl Function

compute_stellar_Rayl(λ₀, h2)

Return the H₂ Rayleigh cross section at stellar/solar wavelength λ₀.

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vSmartMOM.InelasticScattering.get_greek_raman Function

get_greek_raman(rs, n2, o2)

Return Raman phase-function Greek coefficients for rotational or rovibrational Raman scattering in an N₂/O₂ atmosphere.

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