Joel J. K. Parker is senior navigation analyst in the Navigation and Mission Design Branch  at NASA Goddard Space Flight Center, where he contributes to projects in the fields of mission design, navigation, and space policy. Mr. Parker is the PI for the Lunar GNSS Receiver Experiment CLPS payload, and is a founding member of the GSFC Positioning, Navigation and Timing Policy team, where he is involved in national and international projects related to GPS, GNSS, and space-based PNT services. He leads NASA involvement in development the Interoperable GNSS Space Service Volume concept via the United Nations International Committee on GNSS. Mr. Parker received his BS and MS in Aerospace Engineering from the Mississippi State University.

Dr. Michael C. Moreau has worked for NASA since 2001, and has been one of the leaders of NASA’s OSIRIS-REx asteroid sample return mission since 2013, currently as deputy project manager. Prior to joining OREx, he contributed to space navigation activities as part of NASA Goddard’s Satellite Servicing Capabilities project, NASA’s Constellation Program, GPS III, and another large national defense satellite program. Dr. Moreau has degrees in Mechanical Engineering and Aerospace Engineering from the universities of Vermont and Colorado, respectively. His PhD research, which found application on a number of Earth orbiting satellites, focused on applications of GPS in high Earth orbits.

Dr. Dolan E. Highsmith is a senior project engineer at The Aerospace Corporation in the Systems Integration and Protection Department of the Civil Systems Group based in the Washington, DC, region.  Current projects include the GPS Antenna Characterization Experiment (ACE) and OSIRIS-REx Flight Dynamics, and he recently took on the role of deputy chief engineer for the NASA Conjunction Assessment Risk Analysis (CARA) team at Goddard Space Flight Center.  Dr. Highsmith received his BS in Aerospace Engineering from the University of Virginia and MS and PhD from the University of Colorado, Boulder.

Dr. Philip D. Martzen is a senior engineering specialist at The Aerospace Corporation in the Navigation and Geopositioning Systems Department where he has worked since 1997.  His work experience includes orbit determination during early orbit operations, orbit estimation algorithms development, dynamical and measurement models development, and weak signal GPS batch mode receiver development.  His previous work included gravity and geodetic error analysis at Geodynamics Corporation.  He has 40 years of experience with Aerospace TRACE and its variants which he currently maintains.  Dr. Martzen received his PhD in Physics from the University of California, Santa Barbara.