Struct LogProfile 

pub struct LogProfile {
    pub reference_speed_mps: f64,
    pub reference_height_m: f64,
    pub roughness_m: f64,
    pub direction_from_deg: f64,
}

Log-law boundary layer: u(z) = u_ref · ln(z/z0) / ln(z_ref/z0) for z > z0, zero below the roughness length z0. Direction is constant with height.

z is height above the GROUND, the surface where the profile is calm: the altitude argument of speed_at and position_m[1] in WindField::wind must both be height above ground. In a frame whose y is altitude above sea level, read it at y - ground elevation, in one place only (this crate has no offset wrapper; see Sounding::to_profile_field).

Fields

reference_speed_mps: f64

Wind speed at the reference height, m/s.

reference_height_m: f64

Reference height, metres (above the roughness length).

roughness_m: f64

Aerodynamic roughness length z0, metres.

direction_from_deg: f64

Meteorological direction the air comes FROM, degrees (constant with height).

Implementations

impl LogProfile

pub fn new( reference_speed_mps: f64, reference_height_m: f64, roughness_m: f64, direction_from_deg: f64, ) -> Result<Self>

Validate the parameters.

pub fn speed_at(&self, altitude_m: f64) -> f64

Wind speed at an altitude, m/s.

Trait Implementations

impl Clone for LogProfile

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LogProfile

impl Debug for LogProfile

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

Formats the value using the given formatter.

impl WindField for LogProfile

fn wind(&self, _time_s: f64, position_m: [f64; 3]) -> Wind

World-frame air velocity at a time (seconds) and position ([x, y, z] metres, Y up).