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Evolution of Orion Mission Design for Exploration Mission 1 and 2The evolving mission design and concepts of NASA's next steps have shaped Orion into the spacecraft that it is today. Since the initial inception of Orion, through the Constellation Program, and now in the Exploration Mission frame-work with the Space Launch System (SLS), each mission design concept and program goal have left Orion with a set of capabilities that can be utilized in many different mission types. Exploration Missions 1 and 2 (EM-1 and EM-2) have now been at the forefront of the mission design focus for the last several years. During that time, different Design Reference Missions (DRMs) were built, analyzed, and modified to solve or mitigate enterprise level design trades to ensure a viable mission from launch to landing. The resulting DRMs for EM-1 and EM-2 were then expanded into multi-year trajectory scans to characterize vehicle performance and Earth-Moon geometry trends. This provides Orion's subsystems with stressing reference trajectories to help design their system. Now that Orion has progressed through the Preliminary and Critical Design Re-views (PDR and CDR) there is a general shift in the focus of mission design from aiding the vehicle design to providing mission specific products needed for pre-flight and real time operations. Some of the mission specific products need-ed include analysis of steering law performance, inputs into navigational accura-cy assessments, abort options at any point in the mission for each valid trajecto-ry in the launch window, recontact avoidance between the upper stage and Orion post nominal separation, etc.
Document ID
20150023252
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Gutkowski, Jeffrey P. (NASA Johnson Space Center Houston, TX, United States)
Dawn, Timothy F. (NASA Johnson Space Center Houston, TX, United States)
Jedrey, Richard M. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
December 17, 2015
Publication Date
February 5, 2016
Subject Category
Lunar And Planetary Science And Exploration
Astronautics (General)
Report/Patent Number
AAS 16-111
JSC-CN-35009
Meeting Information
Meeting: Guidance and Control Conference
Location: Breckenridge, CO
Country: United States
Start Date: February 5, 2016
End Date: February 10, 2016
Sponsors: American Astronomical Society
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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