spacecraft-paladin 0.1.3

high-fidelity spaceraft dynamics propagator

paladin : python library for astrodynamics

Overview

This package provides tools for conducting CR3BP and ephemeris level analysis in cislunar and deep-space environments.

While the library is implemented in python, the majority of functionalities are powered by either SPICE routines or through numpy/scipy/numba implementations, resulting in (relatively) fast computations. For numerical integration of ODEs, paladin provides the option of using either scipy or gsl; the latter is recommended due to higher accuracy.

Optimization is conducted by constructing problems as pygmo udp's, which can then be solved through a variety of compatible solvers, including IPOPT, SNOPT, or WORHP (the latter two requires licenses).

Dependencies

Developed on python 3.10.

Package requirements:

• numpy, matplotlib, numba, scipy, spiceypy, sympy

Optional:

• pygsl : recommended for high-accuracy integration; requires gsl to be installed.
• pygmo, pygmo_plugins_nonfree : required for running trajectory construction problems

SPICE setup

Users are responsible for downloading the generic SPICE kernels froom the NAIF website. In addition, supplementary custom kernels specific to this module are stored in paladin/assets/spice/. The most commonly required kernels are:

• naif0012.tls
• de440.bsp
• gm_de440.tpc

GSL setup

See pygsl setup notes

Installation

This package is still in development. For now, please clone the repository and add to path.

Capabilities

Roadmap

• GSL event capability
• Propagation in CR3BP
• Propagation in N-body problem
• Transition to full-ephemeris model
• Helper methods for frame transformation

Gallery

NRHO propagation