# High-Precision Orbit Propagator
API reference for the numerical (force-model) propagator. For background, see:
- [Force Model](../guide/forces.md) — modeled forces and physical motivation
- [Empirical SRP: ECOM](../guide/ecom.md) — the experimental ECOM solar-radiation-pressure model behind `satproperties.ecom`
- [ODE Integrators](../guide/integrators.md) — solver families, step-size selection, tolerances
- [State Vectors, STM & Covariance](../guide/satstate.md) — state representation, STM, covariance propagation, maneuvers
- Tutorial: [GPS Example](../tutorials/GPS Example.ipynb)
- [References](../guide/references.md) — primary sources for each force model and integrator
- Tutorial: [ECOM Solar Radiation Pressure](../tutorials/ECOM Solar Radiation Pressure.ipynb)
::: satkit.propagate
::: satkit.propresult
::: satkit.propsettings
::: satkit.integrator
::: satkit.tidemodel
::: satkit.propstats
::: satkit.satproperties
::: satkit.ecomparams
::: satkit.thrust