nyx

Nyx is a high fidelity, fast, reliable and validated astrodynamics toolkit library written in Rust and available in Python.

The target audience is mission designers, astrodynamics engineers/hobbyists, and GNC engineers. The rationale for using Rust is to allow for very fast computations, guaranteed thread safety, and portability to all platforms supported by Rust.

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License

The AGPLv3 LICENSE is enforced.

Features

Propagation

• [x] Propagation with different Runge Kutta methods (validated in GMAT)
• [x] Convenient and explicit definition of the dynamics for a simulation (cf. tests/orbitaldyn.rs)
• [x] Propagation to different stopping conditions

• [x] Detect orbital events in other frames

  Dynamical models

• [x] Multibody dynamics using XB files

• [x] Finite burns with fuel depletion (including low thrust / ion propulsion)
• [x] Sub-Optimal Control of continuous thrust (e.g. Ruggerio, Petropoulos/Q-law)
• [x] Solar radiation pressure modeling
• [x] Basic drag models (cannonball)
• [x] Spherical harmonics

• [ ] Spacecraft attitude control and some useful optimal control algorithms

  Orbit determination

• [x] Statistical Orbit Determination: Classical and Extended Kalman Filter

• [x] Orbit Determination with multibody dynamics
• [x] Smoothing and iterations of CKFs
• [ ] Square Root Information Filer (SRIF) (removed in version 1.0.0-alpha.1)
• [x] An easy-to-use OD user interface
• [x] Estimation with spherical harmonics enabled
• [ ] Solar radiation pressure (SRP) parameter estimation (#98)
• [x] Covariance mapping and estimate frame transformations
• [x] State noise compensation (SNC)
• [ ] Dynamic model compensation (DMC) (#86)

• [x] High fidelity ground station placement

  Celestial computations

• [x] Orbital state manipulation

• [x] Planetary and Solar eclipse and visibility computation
• [x] Light-time corrections and aberrations
• [x] Frame rotations

Who am I?

An astrodynamics engineer with a heavy background in software. I currently work for Rocket Lab USA on the GNC of the Blue Ghost lunar lander. -- Find me on LinkedIn.