Crate principia 

principia — typed Newtonian numerical dynamics

principia owns the reusable, domain-agnostic numerical mechanics layer: typed Cartesian states, acceleration models, integrators, propagation, variational equations, covariance transport, and gravity-field kernels.

References

• Vallado, Fundamentals of Astrodynamics and Applications.
• Montenbruck & Gill, Satellite Orbits.

Re-exports

pub use covariance::ProcessNoise;

pub use covariance::StateCovariance;

pub use error::PrincipiaError;

pub use frames::lvlh_from_raw_km_km_s;

pub use frames::rtn_from_raw_km_km_s;

pub use frames::vnc_from_raw_km_km_s;

pub use frames::LocalTrajectoryFrame;

pub use frames::LVLH;

pub use frames::RTN;

pub use frames::VNC;

pub use gravity::spherical_harmonic_acceleration;

pub use gravity::spherical_harmonic_acceleration_raw_km;

pub use gravity::GravityConstants;

pub use gravity::GravityFieldProvider;

pub use integrators::dop853_propagate;

pub use integrators::dop853_step;

pub use integrators::dopri5_propagate;

pub use integrators::dopri5_step;

pub use integrators::rk4_propagate;

pub use integrators::rk4_step;

pub use integrators::AdaptiveStepper;

pub use integrators::Dop853;

pub use integrators::Dop853Step;

pub use integrators::Dopri5;

pub use integrators::Rk4;

pub use integrators::Stepper;

pub use models::CompositeModel;

pub use models::AccelerationModel;

pub use models::AccelerationPartials;

pub use models::TwoBody;

pub use models::J2;

pub use propagation::propagate;

pub use propagation::PropagationConfig;

pub use propagation::PropagationResult;

pub use propagation::EventDetector;

pub use propagation::EventDirection;

pub use propagation::EventOccurrence;

pub use propagation::PropagationError;

pub use propagation::RadialThresholdEvent;

pub use state::DynamicsState;

pub use state::StateDerivative;

pub use variational::finite_diff_stm_series;

pub use variational::finite_diff_stm;

pub use variational::propagate_stm;

pub use variational::propagate_stm_with;

pub use variational::StateTransitionMatrix;

pub use variational::VariationalConfig;

Modules

covariance

Cartesian state covariance and process noise.

error

Crate-level error family for principia.

frames

Local trajectory frames.

gravity

Gravity-field provider trait and spherical-harmonic acceleration kernel.

integrators

Numerical integrators for DynamicsState.

models

Acceleration models and composition.

propagation

Adaptive propagation driver, events, and results.

state

Cartesian dynamics state and time-derivative aggregate.

variational

Variational equations and state-transition matrices.

Structs

IntegratorTolerances

Combined typed tolerances for a variable-step ODE integrator.