Reference frame tree and Earth rotation (RNP, nutation, precession) for the astrodyn orbital-dynamics pipeline
Pipeline orchestration, VehicleBuilder, and recipes — single API surface for ECS adapters
Rigid-body dynamics, integrators (RK4, RKF45, GJ, ABM4), mass tree, and body initialization
Time scales (TAI/UTC/UT1/TDB/TT/GMST) and converters for the astrodyn orbital-dynamics pipeline
General-purpose DE4xx (SPICE) binary ephemeris reader for orbital mechanics applications
Bevy ECS adapter for the astrodyn orbital-dynamics gateway
Planet definitions and presets (Earth, Moon, Sun, Mars) for the astrodyn orbital-dynamics pipeline
Phantom-tagged typed quantities (Position, Velocity, ...) for orbital dynamics
Quaternion, Euler, geodetic, orbital-element, and LVLH math kernels for the astrodyn orbital-dynamics pipeline
Atmospheric density models (exponential, MET) for the astrodyn orbital-dynamics pipeline