Multiple Gravity Assist Trajectory Planner for KSP

An online tool providing automatic design of trajectories with multiple gravity assists for Kerbal Space Program. See the forum post.

Dependencies

This project was developed on Visual Studio Code.
It requires type definitions for THREE.js, Chart.js and js-yaml. They can be obtained with the following commands:

npm install --save-dev @types/three
npm install --save-dev @types/js-yaml
npm install --save-dev @types/chart.js

This project also includes THREE.js example classes for line rendering and camera control. In order to have the TypeScript compiler recognize them, the following lines must be addded to node_modules/@types/three/src/Three.d.ts:

/* Examples imports */
/* Example lines */
export * from '../examples/jsm/lines/Line2';
export * from '../examples/jsm/lines/LineGeometry';
export * from '../examples/jsm/lines/LineMaterial';
/* OrbitControls */
export * from '../examples/jsm/controls/OrbitControls';

Solar systems support

The tool can support any solar system configuration. You can contribute to add support for solar systems from known mods.

1. Fork this project and create a new branch for your solar system.
2. Create a new folder in data for your system with a config.yml and bodies.yml file following the templates in data/stock.
   • config.yml stores the global configurations of the tool. These parameters may need to be changed depending on the characteristics of the solar system (e.g. duration of a day, camera clip distances for large solar systems...).
   • bodies.yml stores the description of each bodies in the solar system. It must rigorously follow the template format. If your solar system uses Kopernicus configuration files, you can directly convert them into a bodies.yml file via this page.
3. Add an entry to data/systems.yml for your solar system.
4. Test the tool locally with your system (run the tool on a local HTTP server), check for the coherence of results and ingame feasibility.
5. Create a pull request to this repository.

Used resources

• Ceriotti, Matteo (2010) Global optimisation of multiple gravity assist trajectories. PhD thesis.
• Orbital Mechanics for Engineering Students by Howard D. Curtis
• René Schwarz' website and his Memorandum Series
• Astrodynamics Wikibook
• ESA's Lambert Solver script for pykep
• Space Exploration StackExchange (more precisely this and this post)