Patched Conic Trajectory Code

PatCon code was developed to help mission designers run trade studies on launch and arrival times for any given planet. Initially developed in Fortran, the required inputs included launch date, arrival date, and other orbital parameters of the launch planet and arrival planets at the given dates. These parameters include the position of the planets, the eccentricity, semimajor axes, argument of periapsis, ascending node, and inclination of the planets. With these inputs, a patched conic approximation is used to determine the trajectory.

The patched conic approximation divides the planetary mission into three parts: (1) the departure phase, in which the two relevant bodies are Earth and the spacecraft, and where the trajectory is a departure hyperbola with Earth at the focus; (2) the cruise phase, in which the two bodies are the Sun and the spacecraft, and where the trajectory is a transfer ellipse with the Sun at the focus; and (3) the arrival phase, in which the two bodies are the target planet and the spacecraft, where the trajectory is an arrival hyperbola with the planet as the focus.

This work was done by Brooke Anderson Park and Henry Wright of Langley Research Center. LAR-17446-1

This Brief includes a Technical Support Package (TSP).

Patched Conic Trajectory Code (reference LAR-17446-1) is currently available for download from the TSP library.

Please Login at the top of the page to download.


White Papers

Introduction to Hypervisor Technology
Sponsored by Curtiss-Wright Controls Embedded Computing
Engaging stakeholders in the home medical device market
Sponsored by bsi
3D Printing in Space: The Next Frontier
Sponsored by Stratasys
Guidelines for Ensuring PCB Manufacturability
Sponsored by Sunstone Circuits
Advances in Laser Welding Systems and Technology for Medical Device Manufacturing
Sponsored by Miyachi Unitek
The Aerospace Industry Takes a Fresh Look at Its Wire Harness Design Approach
Sponsored by Mentor Graphics

White Papers Sponsored By: