Crate assist_rs 

High-level domain layer for ASSIST + REBOUND solar-system propagation.

The raw FFI bindings and safe RAII wrappers live in the companion libassist-sys crate (which itself depends on librebound-sys for the REBOUND C ABI). This crate adds:

• Orbit + NonGravParams + Origin + AssistData: domain types for orbital states, non-gravitational coefficients, coordinate origins, and the bundled (ephemeris + observatory table) data handle.
• ObservatoryTable + earth_orientation: MPC observatory lookups and Earth-orientation kernel handling for topocentric observations.
• propagate: single-orbit + batched + rayon-parallel propagators, PropagatorPool for reusing simulations across many orbits, and STM
  • covariance propagation.
• ephemeris: topocentric ephemeris generation with light-time iteration.
• data (feature data): a data::DataManager that fetches + caches ephemeris and Earth-orientation kernels.

All of libassist-sys’s public surface is re-exported here so downstream consumers can keep a single assist_rs import.

Re-exports

pub use coordinates::ecliptic_to_equatorial;

pub use coordinates::equatorial_to_ecliptic;

pub use ephemeris::EphemerisResult;

pub use ephemeris::Observer;

pub use ephemeris::assist_generate_ephemeris;

pub use ephemeris::assist_generate_ephemeris_single;

pub use propagate::PropagatedState;

pub use propagate::PropagatorConfig;

pub use propagate::PropagatorPool;

pub use propagate::assist_propagate;

pub use propagate::assist_propagate_single;

pub use libassist_sys;

pub use librebound_sys;

Modules

coordinates

Coordinate frame transformations.

data

Data file management for ASSIST.

earth_orientation

Binary PCK reader for Earth orientation (ITRF93 ↔ ICRF/J2000).

ephemeris

assist_generate_ephemeris_single — Propagate orbit to observer epochs with light-time correction and topocentric spherical output.

ffi

Raw FFI bindings to the ASSIST C library.

propagate

assist_propagate_single — N-body propagation of a test particle.

Structs

AssistData

Bundle of the data resources the high-level assist_* functions need.

AssistSim

A REBOUND simulation with ASSIST ephemeris forces attached.

BodyState

State vector result from assist_get_state.

Ephemeris

Owned ASSIST ephemeris data. Freed on drop.

IntegratorConfig

Per-call IAS15 integrator knobs. None for any field leaves the REBOUND default in place.

NonGravParams

Marsden-Sekanina non-gravitational force parameters.

ObservatoryTable

Lookup table from MPC observatory code to parallax coefficients.

Orbit

A test particle orbit: state vector + epoch + optional non-gravitational parameters.

Simulation

Owned REBOUND simulation. Freed on drop.

Enums

Error

Error type for assist-rs operations.

Ias15AdaptiveMode

IAS15 timestep-adaptation rule. REBOUND default since 2024-01 is Self::Prs23; older code used Self::Global.

Origin

An origin point in the solar system: a named body, barycenter, or MPC observatory.

Functions

assist_get_state

Get the heliocentric ecliptic J2000 state of a body or observatory at one or more epochs.

Type Aliases

Result