Atmospheric Impacts on Approach Operations and Entry Targeting for the InSight Mission
- 1 September 2021
- journal article
- research article
- Published by American Institute of Aeronautics and Astronautics (AIAA) in Journal of Spacecraft and Rockets
- Vol. 58 (5), 1538-1547
- https://doi.org/10.2514/1.a35181
Abstract
Early in operational testing for the InSight mission to Mars, it was discovered that the final maneuver to target the entry-interface point was unexpectedly sensitive to planned atmosphere updates that would be based on real-time measurements of the Martian atmosphere by Mars Reconnaissance Orbiter. Upon investigation, the team realized that the Phoenix mission also discovered this sensitivity during operational testing. Further investigation identified that the sensitivity was a result of the fact that both the entry flight path angle and ground target were being held fixed in the maneuver design process, constraining the maneuver in a way that forced the entry time to change to compensate for changes to the nominal trajectory from updating the atmosphere model. The final maneuver was planned for 22 h before entry, at which point it is very expensive to change entry time. The study also revealed that any unguided Mars entry, descent, and landing mission would be impacted by this sensitivity if it used real-time atmosphere observations to model the nominal expected atmosphere used for maneuver targeting of the entry-interface point. This paper discusses the results of that investigation and presents a number of mitigations as well as the consequences of ignoring the sensitivity.Keywords
Funding Information
- Jet Propulsion Laboratory (80NM0018D0004)
- California Institute of Technology
This publication has 12 references indexed in Scilit:
- MONTE: the next generation of mission design and navigation softwareCEAS Space Journal, 2018
- Selection of the InSight Landing SiteSpace Science Reviews, 2016
- DSENDS: Multi-mission Flight Dynamics Simulator for NASA MissionsPublished by American Institute of Aeronautics and Astronautics (AIAA) ,2016
- MarCO: Interplanetary Mission Development On a CubeSat ScalePublished by American Institute of Aeronautics and Astronautics (AIAA) ,2016
- Mars Phoenix Entry, Descent, and Landing Simulation Design and Modeling AnalysisJournal of Spacecraft and Rockets, 2011
- Analysis of Effectiveness of Phoenix Entry Reaction Control SystemJournal of Spacecraft and Rockets, 2011
- Overview of the Phoenix Entry, Descent, and Landing System ArchitectureJournal of Spacecraft and Rockets, 2011
- Phoenix and MRO coordinated atmospheric measurementsJournal of Geophysical Research, 2010
- Mars Scout Phoenix Parachute System PerformancePublished by American Institute of Aeronautics and Astronautics (AIAA) ,2009
- A Mars Polar Lander failure assessmentPublished by American Institute of Aeronautics and Astronautics (AIAA) ,2000