Text Size
JEOD Determines Dynamic State of Spacecrafts
August 15, 2011

    › Benefits
    › Applications
    › Licensing and Partnering Opportunity
    › Contact Information

Innovators at NASA's Johnson Space Center (JSC) have developed a software package that includes a collection of environment and dynamics models to represent the dynamic state of a spacecraft in a planetary environment. JSC's Engineering Orbital Dynamics (JEOD) Version 2.0 extends the capabilities of JEOD Version 1.4 to allow users to model scenarios anywhere in outer space. JEOD is a collection of mathematical models, represented as differential equations, used to generate vehicle trajectories. JEOD Version 2.0 has a more flexible coordinate system framework and management scheme as well as a new time scale model that better supports multiple and nonlinear time scales. The package has been completely recoded in the C++ programming language and now incorporates an object-oriented framework designed for reuse, extensibility, and long-term growth. These and other modifications combine to provide better long-term spacecraft modeling and simulation support for exploration initiatives. This software may be released for U.S. Government purposes only.


  • Accurate: Provides enhanced time scale modeling
  • Flexible: Supports multiple related coordinate systems and frame-specific vehicle state integration
  • Improved: Permits more accurate modeling of multiple time scales since it permits time scales to have nonlinear dependence
  • Efficient: Features a configurable hierarchical organizational structure to manage and use coordinate systems
  • Extensible: Supports planetary, inter-planetary, and multi-planetary simulations
  • User-friendly: Offers clearer interfaces for external systems model integration


  • Governmental and commercial organizations involved in space exploration

Licensing and Partnering Opportunity

This technology is being made available through JSC's Technology Transfer and Commercialization Office, which seeks to transfer technology into and out of NASA to benefit the space program and U.S. industry. NASA invites companies to consider licensing this technology for commercial applications.

Contact Information

If you would like more information about this technology or about NASA's technology transfer program, please contact:

Technology Transfer and Commercialization Office
NASA's Johnson Space Center
Phone: 281-483-3809
E-mail: jsc-techtran@mail.nasa.gov

Image Token: 
Image Token: 
Page Last Updated: January 16th, 2014
Page Editor: NASA Administrator