Struct SlantPathOptions 

pub struct SlantPathOptions {

    pub hs_km: Option<f64>,
    pub rho_gm3: Option<f64>,
    pub r001_mmh: Option<f64>,
    pub eta: f64,
    pub t: Option<f64>,
    pub h_percent: Option<f64>,
    pub pressure_hpa: Option<f64>,
    pub h_l_m: f64,
    pub l_s_km: Option<f64>,
    pub tau_deg: f64,
    pub v_t_kgm2: Option<f64>,
    pub exact: bool,
    pub include_rain: bool,
    pub include_gas: bool,
    pub include_scintillation: bool,
    pub include_clouds: bool,
}

Optional environmental and model inputs for slant-path attenuation.

Defaults match the ported python-itu-r slant-path behavior: all environmental inputs are looked up from the bundled ITU-R grids where possible, approximate gaseous attenuation is used, and gas, cloud, rain, and scintillation contributions are included.

Fields

hs_km: Option<f64>

Earth station altitude above mean sea level in kilometres.

This is the ground terminal height used by rain, gas, and water-vapour calculations. It may be negative for sites below sea level. When None, the model uses the P.1511/P.836 topographic map at the requested site.

rho_gm3: Option<f64>

Surface water vapour density in g/m^3.

This is the near-surface absolute humidity used by gaseous attenuation. Values must be non-negative. When None, P.836 water-vapour maps are used for the site and time percentage.

r001_mmh: Option<f64>

Rainfall rate exceeded for 0.01% of an average year, in mm/h.

This is the intense-rain reference rate used by P.618 to scale rain attenuation for the requested time percentage. Values must be non-negative. When None, P.837 data are used.

eta: f64

Antenna efficiency factor used in scintillation attenuation.

This dimensionless factor describes effective aperture efficiency for the scintillation fade calculation. It must be in (0, 1]; the default is 0.5.

t: Option<f64>

Surface temperature in kelvin for gaseous attenuation.

This temperature is used by gaseous attenuation and, when h_percent is provided, converted to Celsius for scintillation humidity calculations. Values must be greater than zero. When None, P.1510 annual mean surface temperature data are used.

h_percent: Option<f64>

Relative humidity percentage for scintillation attenuation.

Values must be in [0, 100]. When None, scintillation uses the recommendation’s wet-term refractivity map instead of local humidity, temperature, and pressure.

pressure_hpa: Option<f64>

Atmospheric pressure in hPa.

This is the surface pressure used by gaseous attenuation and, when h_percent is provided, scintillation water-vapour pressure. Values must be positive. When None, P.835 standard-atmosphere pressure is computed from hs_km.

h_l_m: f64

Turbulent layer height in metres for scintillation attenuation.

This is the effective height of the tropospheric turbulent layer. It must be positive; the default is 1000.0 m.

l_s_km: Option<f64>

Slant-path length through rain in kilometres.

This is the portion of the Earth-space path inside the rain region. Values must be positive when provided. When None, P.618 derives the path length from rain height, station height, and elevation.

tau_deg: f64

Polarization tilt angle in degrees.

This describes the radio wave polarization relative to horizontal and affects P.838 rain specific attenuation coefficients. It must be in [0, 90]; the default is 45.0.

v_t_kgm2: Option<f64>

Total water vapour content in kg/m^2 for gaseous attenuation.

This is the vertically integrated water-vapour column above the site. Values must be non-negative. When None, P.836 total-content maps are used.

exact: bool

Use exact gaseous attenuation when true; use the faster approximate path when false.

Exact mode integrates the P.676 gaseous model through atmosphere layers. Approximate mode is faster and matches the default slant-path behavior of the port. The default is false.

include_rain: bool

Include the rain attenuation contribution in the returned total.

When false, SlantPathContributions::rain_db is 0.0.

include_gas: bool

Include the gaseous attenuation contribution in the returned total.

When false, SlantPathContributions::gas_db is 0.0.

include_scintillation: bool

Include the scintillation attenuation contribution in the returned total.

When false, SlantPathContributions::scintillation_db is 0.0.

include_clouds: bool

Include the cloud attenuation contribution in the returned total.

When false, SlantPathContributions::cloud_db is 0.0.

Trait Implementations

impl Clone for SlantPathOptions

fn clone(&self) -> SlantPathOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SlantPathOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SlantPathOptions

fn default() -> Self

Returns the “default value” for a type.

impl Copy for SlantPathOptions