Orbis.Propagator (Orbis v0.9.0)

High-precision numerical orbit propagation.

Supports high-order adaptive numerical integration (DP54) of orbital states using various force models via Rust NIF.

Summary

force_model()

state()

vec3()

Adaptive step propagation using Dormand-Prince 5(4) via Rust NIF. Returns the state at exactly t_end.

Legacy RK4 fixed-step implementation in pure Elixir. Maintained for baselines.

@type force_model() :: (vec3(), vec3() -> vec3())

@type state() :: {r :: vec3(), v :: vec3()}

@type vec3() :: {float(), float(), float()}

@spec propagate(state(), float(), keyword()) :: {:ok, state()} | {:error, any()}

Adaptive step propagation using Dormand-Prince 5(4) via Rust NIF. Returns the state at exactly t_end.

:tolerance — Integration tolerance (default: 1.0e-12)
:forces — List of active force models: ["twobody", "j2"] (default: ["twobody"])

@spec propagate_rk4(state(), float(), [force_model()]) :: state()

Legacy RK4 fixed-step implementation in pure Elixir. Maintained for baselines.