Enum GravityModel 

#[non_exhaustive]
pub enum GravityModel {
    Constant {
        g_mps2: f64,
    },
    VerticalTaylor,
    Vertical,
    Ellipsoidal,
}

How gravity is evaluated along the trajectory.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Constant

A uniform field (0, 0, −g) in the launch frame.

Fields

g_mps2: f64

Gravity magnitude, m/s², not negative: the field points down whatever the sign convention of the source, and Earth::new rejects a negative value.

VerticalTaylor

(0, 0, −γ) with γ from the Taylor series (eq. 4-3) at the launch latitude and height h₀ + z: RocketPy’s gravity formula, for like-for-like comparisons. A RocketPy flight differs from the formula in three ways a case must reproduce itself: it evaluates it at height above sea level rather than above the ellipsoid; it holds the value constant above max_expected_height (80 km by default; at 100 km that is 0.6% high); and it does not fly the formula at all but a 100-point cubic spline through it (Environment.set_gravity_model → Function.set_discrete), which over the 0 to 4.4 km of the parachute descents of M1.7a differs from the formula by at most 4.6e-8 m/s².

Vertical

(0, 0, −|γ|) with the exact magnitude (eq. 4-4) at the launch latitude and longitude and height h₀ + z: altitude-dependent, but always along the launch site’s vertical.

Ellipsoidal

The full normal gravity vector at the body’s actual position, resolved in the launch frame. It includes the turn of the vertical over long ranges (about 0.9 mrad per 5.7 km) and the small deflection above the ellipsoid.

Trait Implementations

impl Clone for GravityModel

fn clone(&self) -> GravityModel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GravityModel

impl Debug for GravityModel

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

Formats the value using the given formatter.

impl Default for GravityModel

fn default() -> GravityModel

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for GravityModel

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for GravityModel

fn eq(&self, other: &GravityModel) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for GravityModel

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for GravityModel