Jeannette P. Owens
Media Relations Office
April 21, 2009
RELEASE : 09-015
NASA and Boeing Win 2008 Software of the Year Award
CLEVELAND -- NASA's Glenn Research Center and Boeing employees have won the 2008 NASA Software of the Year Award for the development of a general-purpose program used to perform trajectory optimization and performance studies for a wide variety of vehicles including aircraft, rockets, satellites and interplanetary vehicles.

The team developed Optimal Trajectories by Implicit Simulation, version 4 (OTIS4), which utilizes state-of-the-art numerical integration and optimization technologies to predict how a vehicle will perform or to determine how best to fly it. Data generated by the program allows a variety of studies to be accomplished including vehicle and sub-system design trades, guidance studies, error analyses and mission planning.

With OTIS4, users can seamlessly generate optimal trajectories and parametric vehicle designs simultaneously. Flight paths can be generated with respect to any of the major bodies in the solar system. In addition, OTIS4 can be used to solve non-aerospace continuous time optimal control problems.

The prestigious Software of the Year Award recognizes developers of exceptional software created for or by NASA and owned by NASA. Developers of this breakthrough technology include Glenn engineers Waldy K. Sjauw of Concord Township, Robert D. Falck of Cleveland, John P. Riehl, distinguished research associate, of Strongsville and Boeing engineer Stephen W. Paris of Kent, Wash.

The software recently was used to conduct a launch abort analysis of the Orion crew exploration vehicle. Its highly generalized modeling capabilities enable developers to generate more detailed simulation as the vehicle and mission design advance without abandoning the basic simulation framework. More realistic constraints can be added and design options easily traded off to obtain insight into the final design.

OTIS4 is widely used throughout the U.S aerospace industry, but its distribution is subject to the export control laws of the country. NASA's In-Space Program funded much of the OTIS4 effort.

The team received their award at the NASA Project Management Challenge in Daytona Beach, Fla., in February.

For more information on OTIS, visit:

For information about NASA's Glenn Research Center, visit:

Photos of the OTIS4 team can be found at:


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