TABLE L.1 Technology Area Breakdown Structure for TA09, Entry, Descent, and Landing Systems

NASA Draft Roadmap (Revision 10) Steering Committee-Recommended Changes
TA09 Entry, Descent, and Landing Systems Several items have been merged and/or relocated or deleted.

9.1.    Aeroassist and Atmospheric Entry


9.1.1.     Rigid Thermal Protection Systems


9.1.2.     Flexible Thermal Protection Systems


9.1.3.     Rigid Hypersonic Decelerators


9.1.4.     Deployable Hypersonic Decelerators


9.1.5.     Instrumentation and Health Monitoring

Move: 9.1.5 into added 9.4.6, Instrumentation and Health Monitoring

9.1.6.     Entry Modeling and Simulation

Merge 9.1.6 with 9.2.5 and 9.3.6 and move to added 9.4.5, EDL

9.2.    Descent

Modeling and Simulation

9.2.1.     Attached Deployable Decelerators


9.2.2.     Trailing Deployable Decelerators


9.2.3.     Supersonic Retropropulsion


9.2.4.     GN&C Sensors

Merge 9.2.4 with 9.3.4 and move to added 9.4.7, GN&C Sensors and

9.2.5.     Descent Modeling and Simulation

Merge 9.2.5 with 9.1.6 and 9.3.6 and move to added 9.4.5, EDL Modeling and Simulation

9.3.    Landing


9.3.1.     Touchdown Systems


9.3.2.     Egress and Deployment Systems


9.3.3.     Propulsion Systems


9.3.4.     Large Body GN&C

Merge 9.3.4 with 9.2.4 and move to added 9.4.7.

9.3.5.     Small Body Systems


9.3.6.     Landing Modeling and Simulation

Merge 9.3.6 with 9.1.6 and 9.2.5 and move to added 9.4.5.

9.4.    Vehicle Systems Technology


9.4.1.     Architecture Analyses

Delete: 9.4.1. Architecture Analyses

9.4.2.     Separation Systems


9.4.3.     System Integration and

Note: In some places in the roadmap,

9.4.3      Systems Integration and Analyses

Analyses" is titled "Vehicle Technology." "Systems Integration and

9.4.4.     Atmosphere and Surface Characterization

Analyses" more accurately describes the content of this technology.
  Add: 9.4.5. EDL Modeling and Simulation
  Add: 9.4.6. Instrumentation and Health Monitoring
  Add: 9.4.7. GN&C Sensors and Systems

GN&C sensors (9.2.4) are applicable to entry and landing as well as descent. In addition, there are entry and descent aspects to large-body GN&C (9.3.4). Therefore, these items have been combined into a new level 3 technology (9.4.7, GN&C Sensors and Systems) in technology subarea 9.4, Vehicle Systems Technology.

Technology 9.4.1 Architecture Analyses appears in the TABS and in two summary figures in the TA09 roadmap, but it does not appear in the roadmap table of contents or in the text in the main body of the roadmap. It has been deleted.

Technology 9.4.3 in the TABS is titled Systems Integration and Analyses. In some places in the roadmap it is titled Vehicle Technology. Systems Integration and Analyses more accurately describes the content of this technology.


EDL is commonly a challenging aspect of NASA missions; EDL problems have been associated with some significant failures as well as many near misses.

NASA’s draft EDL roadmap may be too narrow because it is focused on the development of human class, large payload delivery to Mars as the primary emphasis, even though such a mission may be three decades away. While this mission beneficially stresses and challenges EDL technology development, it would be prudent to consider the benefit of advanced EDL technologies to other possible applications to ensure that the technology

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