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Advances in Orion's On-Orbit Guidance and Targeting System ArchitectureNASA's manned spaceflight programs have a rich history of advancing onboard guidance and targeting technology. In order to support future missions, the guidance and targeting architecture for the Orion Multi-Purpose Crew Vehicle must be able to operate in complete autonomy, without any support from the ground. Orion's guidance and targeting system must be sufficiently flexible to easily adapt to a wide array of undecided future missions, yet also not cause an undue computational burden on the flight computer. This presents a unique design challenge from the perspective of both algorithm development and system architecture construction. The present work shows how Orion's guidance and targeting system addresses these challenges. On the algorithm side, the system advances the state-of-the-art by: (1) steering burns with a simple closed-loop guidance strategy based on Shuttle heritage, and (2) planning maneuvers with a cutting-edge two-level targeting routine. These algorithms are then placed into an architecture designed to leverage the advantages of each and ensure that they function in concert with one another. The resulting system is characterized by modularity and simplicity. As such, it is adaptable to the on-orbit phases of any future mission that Orion may attempt.
Document ID
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Scarritt, Sara K.
(NASA Johnson Space Center Houston, TX, United States)
Fill, Thomas
(Draper (Charles Stark) Lab., Inc. Cambridge, MA, United States)
Robinson, Shane
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
February 23, 2015
Publication Date
January 30, 2015
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
Meeting Information
Meeting: AAS Guidance Navigation and Control Conference
Location: Breckenridege, CO
Country: United States
Start Date: January 30, 2015
End Date: February 4, 2015
Sponsors: American Astronautical Society
Distribution Limits
Public Use Permitted.
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