nasabreakup

# NASA Breakup Model in Python
NASA Standard Breakup Model in Python is a Python library for simulating explosion and collision events in orbit using the NASA Standard Breakup Model. The breakup model was implemented based on the following works: NASA’s new breakup model of evolve 4.0 (Johnson et al.), and Proper Implementation of the 1998 NASA Breakup Model (Krisko et al.). ## Installation NASA Breakup Model in Python runs on Python 3.6 or higher (Python 3.8 is recommended): Currently the package is available using pip: ``` pip install nasabreakup ``` >*A conda distribution will be made available when the project is stable* ## Getting Started To use NASA Breakup Model in Python, you must first create a .yaml file to configure the simulation. This file has three required fields, the minimum characteristic length, the [simulation type](https://nasa-breakup-model-python.readthedocs.io/en/latest/_autosummary/nasabreakup.configuration.SimulationType.html), and the [satellite type](https://nasa-breakup-model-python.readthedocs.io/en/latest/_autosummary/nasabreakup.configuration.SatType.html) involved in the fragmentation event. Secondly, you must provide an implementation of [Satellite](https://nasa-breakup-model-python.readthedocs.io/en/latest/_autosummary/nasabreakup.satellite.Satellite.html). Once, you have those two criterion met you can perform the simulation as follows: ```python from nasabreakup.configuration import SimulationConfiguration from nasabreakup.model import FragmentationEvent config = SimulationConfiguration('data/simulation_config.yaml') event = FragmentationEvent(config, np.array([sat])) debris = event.run() ``` > An example configuration.yaml and Satellite implementation has been provided in `examples` ## Resulting Data Format | index | data | type | |-------|----------------------------|------------------------------------| | 0 | SatType (for internal use) | enum | | 1 | position | np.array (, 3), containing floats | | 2 | characteristic length | float | | 3 | area to mass ratio | float | | 4 | area | float | | 5 | mass | float | | 6 | velocity | np.array (, 3), containing floats | >*The returned debris is an (n, 7, 3) numpy array. However, only the position and velocity use the third axis as those quanities are vectors.* >*All other fields have 3 copies of their respective data. This was done as a performance optimization for numpy* ## Documentation - [Read the Docs](https://nasa-breakup-model-python.readthedocs.io/en/latest/)