Gravity-assist Trajectory Design and Analysis - SNOPT

Version 2.1.0.0 (16 MB) by David Eagle
A MATLAB Script for Interplanetary Gravity-Assist Trajectory Design and Optimization
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Updated 23 Dec 2023

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PDF document and a MATLAB script called flyby_matlab_snopt that can be used to design and optimize interplanetary trajectories that include a single gravity assist maneuver. The user specifies the launch, flyby and destination planets, and the desired flyby altitude. The algorithm also requires initial guesses for the launch, flyby and arrival calendar dates. This script searches for a patched-conic gravity-assist trajectory that satisfies the flyby mission constraints (V-infinity matching and user-defined flyby altitude) and minimizes the launch, arrival or total impulsive delta-v for the mission. The type of delta-v optimization is specified by the user.

Cite As

David Eagle (2024). Gravity-assist Trajectory Design and Analysis - SNOPT (https://www.mathworks.com/matlabcentral/fileexchange/39462-gravity-assist-trajectory-design-and-analysis-snopt), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2023b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes
2.1.0.0

Updated source code and PDF documentation
2.0.0.0

Script is now "data file driven". Added asteroid or comet as arrival body. Updated PDF document and added several new example missions.
1.6.0.0

MATLAB source code updates (new keywords, etc.)
1.5.0.0

Fixed bug in code that calculated the heliocentric orbital elements and state vector of the departure planet. (emu replaced with smu in the calling argument).
1.4.0.0

UPDATED LINKS

SNOPT ccom.ucsd.edu/~optimizers/

Binary Ephemeris Files

https://www.dropbox.com/sh/hul0g7ia6nhspwo/AAATqfVXb5ClZODfGGvEbRZEa?dl=0
1.3.0.0

Bug fixes. Added three-dimensional graphics for the flyby trajectory. Updated PDF document.
1.2.0.0

Added main script (flyby_matlab_64bit.m) that uses the March 17, 2014 version of SNOPT.
1.1.0.0

MICE version included in flyby_mice.zip archive.
1.0.0.0