136 accommodated for in statio n designs and/or operations, excessive dust accumulation on sample tube and  glove surfaces after removal from a bit post -sample acquisition can detrimentally impact operations .  Therefore,  operational dust mitigation efforts are being developed for  validat ion in QMDT  to ensure robust  solutions are available for the flight hardware should an issue exist  on Mars . 

Summary  

The ACA is a complex assembly of mechanisms required to perform a number of functions to meet Mars  2020 science objectives . A number of challenges existed for the development, assembly, and test of the  ACA. Detailed test campaigns were completed to validate the flight hardware and software prior to  integration onto the Rover, which identified a number of issues that were address ed as quickly as possible  to not impact the mission. After the launch of Mars 2020, the remaining ACA units will continue to provide  critical ground- based learning opportunities to improve the robustness of operations on Mars.  

Acknowledgements  

This work  was performed at the Jet Propulsion Laboratory, California Institute of Technology, under a  contract with the National Aeronautics and Space Administration. The Sample Handling Assembly (SHA)  was provided by Maxar , Pasadena, CA under contract with JPL. Reference herein to any specific  commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not  constitute or imply its endorsement by the United States Government or the Jet Propulsion Laboratory,  California Insti tute of Technology . Copyright 2020  California Institute of Technology . U.S. Government  sponsorship acknowledged.  

Designing and developing the ACA, as well as the subsequent ass embly  and testing, relied on a significant  number of people who dedicated many long hours to make the ACA a reality . It would be impossible to list  everyone on the ACA team ; however , listed here are the hardware/station leads and critical ACA staff:  Nick  Haddad, Grayson Adams , Erich Brandeau, Rebecca Perkins , Kayla Andersen, Sarah Sherman, Pavlina  Karafillis , Brad Kobeissi , Suzie Kellogg, Will Green, Jeff Seiden, Jesse Grimes -York, Sean O’Brien , Sivan  Kenig , Eric Roberts , Alex Bielawiec , Ken Glazebrook , Ed Dorantes, and Mary Magilligan. In addition, Louise  Jandura, K eith Rosette, Matt Robinson, Richard Rainen, Don Sevilla, Matt Orzewalla,  Mark Balzer, and  Justin Kaderka have made substantial contributions towards making the ACA a success.  

References  

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