Philip Metzger

Dr. Phil Metzger is a planetary scientist with the Florida Space Institute at the University of Central Florida. In 2014 he retired from NASA’s Kennedy Space Center where he had worked since 1985. He was a part of the Space Shuttle launch team and later with the International Space Station program developing, testing and integrating spaceflight hardware. He then returned to school and earned a Ph.D. in Physics with a focus on granular materials and the regolith of planetary bodies. He co-founded the KSC Swamp Works, performing research and technology development related to planetary regolith. His research led to NASA’s effort to protect the historic lunar sites, including the Apollo landing sites, from rocket exhaust blast effects. He participated in lunar and martian exploration architecture studies and NASA’s technology roadmapping team. He co-founded NASA’s biannual Workshop on Granular Materials in Lunar and Martian Exploration and was selected as Kennedy Space Center’s Scientist/Engineer of the Year for 2011. He received the astronaut’s Silver Snoopy award in 2011.
Dr. Metzger performs research and technology development related to lunar, matian, and asteroidal regolith including: soil compaction processes on airless bodies; rocket exhaust interactions with regolith; modeling the mechanics and excavation of soil; and developing technologies that use regolith as a resource. He is a cooperating scientist with NASA’s Resource Prospector mission, slated to go to the Moon in 2022. He is principle investigator on a NASA contract with Honeybee Robotics to develop small spacecraft that prospect lunar volatiles using the same volatiles for steam propulsion during the mission. He is working with Deep Space Industries on a NASA contract to characterize simulated asteroid regolith. He is studying the commercial-scale extraction of lunar volatiles for rocket fuel for the United Launch Alliance.
Journal Articles

  1. Metzger, Philip T., Anthony Colaprete, and Rick Elphic, “Lunar Regolith Near Surface Complex Structure and Nighttime Cooling Curves Measured by LRO Diviner,” manuscript in preparation.
  2. LaMarche, Casey, Philip Metzger, Peter Liever, Jennifer Sinclair Curtis, “The Effect of Lunar Conditions on Cratering of Particle Beds by Subsonic Turbulent Jets,” Icarus (submitted 12/5/2016).
  3. Metzger, Philip T., “Space Development and Space Science Together: an Historic Opportunity,” Space Policy 37 (2), 77-91 (2016).
  4. Berger, Kyle J., Anshu Anand, Philip T. Metzger, and Christine M Hrenya,, “Erratum: Role of collisions in erosion of regolith during a lunar landing (vol 87, 022205, 2013)”, Physical Review E 91(1), 1-1 (2015).
  5. Lane, John E. and Philip T. Metzger, “Estimation of Apollo lunar dust transport using optical extinction measurements,” Acta Geophysica 63 (2), 568-599 (2014).
  6. Lane, John E., Takis Kasparis, Philip T. Metzger, and W. Linwood Jones, “In Situ Disdrometer Calibration Using Multiple DSD Moments,” Acta Geophysica 62 (6), 1450-1477 (2014).
  7. Anand, Anshu, Kyle J. Berger, Philip T. Metzger, and Christine M Hrenya, “Role of Collisions in Erosion of Regolith during a Lunar Landing,” Physical Review E 87, 022205 (2013).
  8. Metzger, Philip T., Anthony Muscatello, Robert P. Mueller, and James Mantovani, “Affordable bootstrapping of space industry and solar system civilization,” J. Aerospace Engineering 26 (1), 18-29 (2013).
  9. Rickman, Doug, Christopher Immer, Philip Metzger, Emily Dixon, Matthew Pendleton, and Jennifer Edmunson. "Particle Shape in Simulants of the Lunar Regolith." Journal of Sedimentary Research 82 (11), 823-832 (2012).
  10. Murray, J. A., S. Benyahia , P. Metzger, and C. M. Hrenya, “Continuum Representation of a Continuous Size Distribution of Particles engaged in Rapid Granular Flow,” Physics of Fluids 24, 083303 (2012).
  11. Lane, John E., and Philip T. Metzger, “Ballistics Model for Particles on a Horizontal Plane in a Vacuum Propelled by a Vertically Impinging Gas Jet,” Particulate Science and Technology 30(2), 196-208 (2012).
  12. Immer, Christopher D., John E. Lane, Philip T. Metzger, and Sandra Clements, “Apollo Video Photogrammetry Estimation of Plume Impingement Effects,” Icarus 214, 46–52 (July, 2011).
  13. Metzger, Philip T., Jacob Smith, and John E. Lane, “Phenomenology of Soil Erosion by Rocket Exhaust on the Moon and the Mauna Kea Lunar Test Site,” Journal of Geophysical Research – Planets 116, E06005, (June 2011).
  14. LaMarche, Casey Q., Jennifer S. Curtis, and Philip T. Metzger, “Permeability of JSC-1A: A Lunar Soil Simulant,” Icarus 212 (1), 383-389 (March 2011).
  15. Immer, Christopher D., Philip Metzger, Paul Hintze, Andrew Nick and Ryan Horan, “Apollo 12 Lunar Module Exhaust Plume Impingement on Lunar Surveyor III,” Icarus 211 (2), 1089-1102 (February 2011).
  16. Metzger, Philip T., John E. Lane, Robert A. Carilli, Jason M. Long, and Kathy L. Shawn, “Photogrammetry and Ballistic Analysis of a High-Flying Projectile in the STS-124 Space Shuttle Launch,” Acta Astronautica 67, 217-229 (2010).
  17. Lane, John E., Takis Kasparis, W. Linwood Jones, and Philip T. Metzger, “Spatial and Temporal Extrapolation of Disdrometer Size Distributions Based on a Lagrangian Trajectory Model of Falling Rain,” The Open Atmospheric Science Journal 3, 172-186 (2009).
  18. Metzger, Philip T., and John E. Lane, “Electric Potential Due to a System of Conducting Spheres,” The Open Applied Physics Journal 2, 32-48 (2009).
  19. Helenbrook, Brian T., Hayley H. Shen, Michael P. Powers, and Philip T. Metzger, “Continuum modeling and discrete element simulations of elastic-quasi-static granular flow in a compressing slot,” J. Aerospace Engineering 22 (4), 415-422 (2009).
  20. Metzger, Philip T., Christopher D. Immer, Carly M. Donahue, Bruce T. Vu, Robert C. Latta, III, Matthew Deyo-Svendsen, “Jet-induced cratering of a granular surface with application to lunar spaceports,” J. Aerospace Engineering 22 (1), pp. 24-32 (2009).
  21. Wilkinson, R. A.; Metzger, P. T., “Special Section: NASA Exploration 2006 Granular Materials Workshop: Science and Engineering of the Lunar Soil, Introduction,” J. Aerospace Engineering 22 (1), 1-1 (2009).
  22. Metzger, Philip T., “H theorem for contact forces in granular materials,” Physical Review E 77, 011307 (2008).
  23. Behringer, R. P. (Bob), Allen Wilkinson, Philip T. Metzger, “Selected papers from the First Workshop on Granular Materials in Lunar and Martian Exploration at NASA's Kennedy Space Center in February 2005: Editorial,” Granular Matter 9(5), 293-294 (2007).
  24. Metzger, Philip T., and Carly M. Donahue, "Elegance of disordered granular packings: a validation of Edwards' hypothesis," Physical Review Letters 94, 148001 (2005).
  25. Youngquist, Robert C., Philip T. Metzger, and Kelly Kilts, "Force Density Function Relationships in 2-D Granular Media," SIAM Journal on Applied Mathematics 65 (6), 1855-1869 (2005).
  26. Metzger, Philip T., "Granular contact force density of states and entropy in a modified Edwards ensemble," Physical Review E 70, 051303 (2004).
  27. Metzger, Philip T., "Comment on 'Mechanical analog of temperature for the description of force distribution in static granular packings,'" Physical Review E 69, 053301 (2004).
Other Peer-Reviewed Publications

  1. K. Zacny, P. Metzger, K. Luczek, J. Mantovani, R. Mueller, “The World is Not Enough (WINE): Harvesting Local Resources for Eternal Exploration of Space,” AIAA Space 2016, paper no. AIAA 2016-5279.
  2. Susante, Paul van, and Philip T. Metzger, “Design, Test and Simulation of Lunar and Mars Landing Pad Soil Stabilization Built with In-Situ Rock Utilization,” Proceedings of Earth and Space 2016: Engineering, Science, Construction, and Operations in Challenging Environments, Orlando, FL, April 11-15, 2016.
  3. Mueller, R.P., et al, “Automated Additive Construction (AAC) for Earth and Space Using In-situ Resources,” Proceedings of Earth and Space 2016: Engineering, Science, Construction, and Operations in Challenging Environments, Orlando, FL, April 11-15, 2016.
  4. Covey, S.D., J.S. Lewis, P.T. Metzger, D.T. Britt, and S.E. Wiggins, “Simulating the Surface Morphology of a Carbonaceous Chondrite Asteroid,” Proceedings of Earth and Space 2016: Engineering, Science, Construction, and Operations in Challenging Environments, Orlando, FL, April 11-15, 2016.
  5. Chambers, Wesley A., and Philip T. Metzger, “Regolith Instability Caused by Gas Diffusion: A Case Study of the Asteroid Redirect Mission,” Proceedings of Earth and Space 2016: Engineering, Science, Construction, and Operations in Challenging Environments, Orlando, FL, April 11-15, 2016.
  6. Metzger, Philip T., Daniel T. Britt, Stephen D. Covey, and John S. Lewis, “Results of the 2015 Workshop on Asteroid Simulants,” Proceedings of Earth and Space 2016: Engineering, Science, Construction, and Operations in Challenging Environments, Orlando, FL, April 11-15, 2016.
  7. Metzger, Philip T., Kris Zacny, Kathryn Luczek, Magnus Hedlund, “Analysis of Thermal/Water Propulsion for CubeSats That Refuel in Space,” Proceedings of Earth and Space 2016: Engineering, Science, Construction, and Operations in Challenging Environments, Orlando, FL, April 11-15, 2016.
  8. Metzger, Philip T., “Rocket Exhaust Blowing Soil in Near Vacuum Conditions is Faster than Predicted by Continuum Scaling Laws,” Proceedings of Earth and Space 2016: Engineering, Science, Construction, and Operations in Challenging Environments, Orlando, FL, April 11-15, 2016.
  9. Lane, J.E., and Philip T. Metzger, “Image Analysis Based Estimates of Regolith Erosion Due to Plume Impingement Effect,” Proceedings of Earth and Space 2014: Engineering, Science, Construction, and Operations in Challenging Environments, St. Louis, MO, Oct. 27-29, 2014.
  10. Shipley, S.T., P.T. Metzger and J.E. Lane, “Lunar Cold Trap Contamination by Landing Vehicles,” Proceedings of Earth and Space 2014: Engineering, Science, Construction, and Operations in Challenging Environments, St. Louis, MO, Oct. 27-29, 2014.
  11. Metzger, Philip T., Robert C. Latta III, Jason M. Schuler, and Christopher D. Immer, “Craters Formed in Granular Beds by Impinging Jets of Gas,” in Proceedings of Powders and Grains 2009 (Golden, Colorado), July 14-17, 2009.
  12. Tordesillas, Antoinette, Edward Lam, and Philip T. Metzger, “Hyperstaticity and loops in frictional granular packings,” in Proceedings of Powders and Grains 2009 (Golden, Colorado), July 14-17, 2009.
  13. Metzger, Philip T., Deriving the Density of States for Granular Contact Forces, Doctoral Dissertation, University of Central Florida, Spring, 2005.
  14. Metzger, Philip T., John E. Lane, and Robert C. Youngquist, “Asymmetric Electrostatic Radiation Shielding for Spacecraft,” in Proceedings of the 2004 IEEE Aerospace Conference (Big Sky, MT), Mar. 6-13, 2004.
Conference Proceedings

  1. Metzger, Philip, “Economic Planetary Science in the 21st Century,” NASA Planetary Science Vision 2050 Workshop, Washington, DC, Feb. 27-28, 2017.
  2. Britt, D.T., and P. Metzger, “The Technology and Future of In-Situ Resource Utilization: a Capstone Seminar this Spring,” NASA Planetary Science Vision 2050 Workshop, Washington, DC, Feb. 27-28, 2017.
  3. Metzger, P.T., and J. E. Lane, “Effects of Spacecraft Landing on the Moon,” abstract no. 3093, 44th Lunar and Planetary Science Conference (2013).
  4. Lane, John E., Linwood Jones, Takis C. Kasparis, and Philip Metzger, “Measurements of DSD second moment based on laser extinction,” 93rd American Meteorological Society Annual Meeting, Austin, TX, Jan. 6-10, 2013.
  5. Berger, Kyle, Philip T. Metzger, and Christine M. Hrenya, “Assessment of Collision-Less Vs. Collisional Simulation of Lunar Regolith Ejection During Spacecraft Landing,” Proceedings of 2012 AIChE Annual Meeting, Pittsburgh, PA, Oct. 28 – Nov.2, 2012.
  6. Lane, John, Steven Trigwell, Paul Hintze, and Philip Metzger, “Further Analysis on the Mystery of the Surveyor III Dust Deposits,” Proceedings of Earth and Space 2012: Engineering, Science, Construction, and Operations in Challenging Environments, Pasadena, CA, Apr. 15-18, 2012.
  7. Clegg, Ryan N., Bradley L. Jolliff, and Philip T. Metzger, “Photometric Analysis of the Apollo Landing Sites,” Proceedings of Earth and Space 2012: Engineering, Science, Construction, and Operations in Challenging Environments, Pasadena, CA, Apr. 15-18, 2012.
  8. Metzger, Philip T., “Nature's Way of Making Audacious Space Projects Viable,” 100 Year Starship Study Public Symposium, Orlando, FL, Sep.30 - Oct. 2, 2011.
  9. Clegg, Ryan N., Philip T. Metzger, Stephen Huff, and Luke B. Roberson, “Lunar soil erosion physics for landing rockets on the Moon,” abstract no. 1450, 42nd Lunar and Planetary Science Conference (2011).
  10. Metzger, Philip T., Mantovani, James G., Townsend, Ivan I., and Mueller, Robert P., “Integrating beneficiation into regolith conveyance systems,” Workshop on Lunar Applications of Mining and Mineral Beneficiation, Butte, Montana, October 5-7, 2010.
  11. Mueller, Robert P., Philip T. Metzger, and James G. Mantovani, “Regolith as a resource in solar system human and robotic exploration,” paper no. IAC-10-A3.1.7, Proceedings of the 61st International Astronautics Conference, Prague, Czech Republic, Sept. 27 – Oct. 1, 2010.
  12. Metzger, Philip T., Christopher D. Immer, John E. Lane, Jacob Smith, Joseph W. Studak, and Brian F. Banker, “Rocket plume impingement on Mauna Kea lunar analog site compared with photogrammetry of Apollo lunar landing videos,” extended abstract for the First Joint Meeting of the Space Resources Roundtable and the Planetary and Terrestrial Mining Sciences Symposium (PTMSS), Golden , CO, June 8-10, 2010.
  13. Clegg, Ryan, Philip Metzger, Luke Roberson, and Stephen Huff, “Lunar Soil Erosion Physics for Landing Rockets on the Moon,” abstract #P12.013 in APS March Meeting 2010, March 15-19, 2010.
  14. Gamsky, Jacob, and Philip T. Metzger, “The Physical State of Lunar Soil in the Permanently Shadowed Craters of the Moon,” Proceedings of Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments, Honolulu, HI, Mar. 14-17, 2010.
  15. LaMarche, Casey Q., Philip T. Metzger, and Jennifer S. Curtis, “Cratering of a Lunar Soil Simulant, JSC-1A, by a Turbulent Subsonic Jet”, Proceedings of Earth and Space 2010, 12th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments, Honolulu, HI, Mar. 14-17, 2010.
  16. Rahmatian, Laila A., and Philip T. Metzger, “Soil Test Apparatus for Lunar Surfaces,” Proceedings of Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments, Honolulu, HI, Mar. 14-17, 2010.
  17. Metzger, Philip T., John E. Lane, C.D. Immer, J.N. Gamsky, W. Hauslein, Xiaoyi Li, R.C. Latta III, C.M. Donahue, “Scaling of Erosion Rate in Subsonic Jet Experiments and Apollo Lunar Module Landings,” Proceedings of Earth and Space 2010, 12th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments, Honolulu, HI, Mar. 14-17, 2010.
  18. Lane, John E., Philip T. Metzger, and Jeffrey W. Carlson, “Lunar Dust Particles Blown By Lander Engine Exhaust in Rarefied and Compressible Flow,” Proceedings of Earth and Space 2010, 12th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments, Honolulu, HI, Mar. 14-17, 2010.
  19. Immer, Christopher, Philip Metzger, “Rocket Cratering in Simulated Lunar and Martian Environments,” Proceedings of Earth and Space 2010, 12th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments, Honolulu, HI, Mar. 14-17, 2010.
  20. Mueller, Robert P., Ivan I. Townsend, James G. Mantovani, and Philip T. Metzger, “Evolution of Regolith Feed Systems for Lunar ISRU O2 Production Plants,” Proceedings of 48th AIAA Aerospace Sciences Conference, Orlando, Florida, January 4-7, 2010.
  21. Metzger, Philip T., Xiaoyi Li, Christopher D. Immer, and John E. Lane, “ISRU Implications of Lunar and Martian Plume Effects,” Proceedings of 47th AIAA Aerospace Sciences Conference, Orlando, FL, January 5-8, 2009.
  22. Clegg, Ryan N., Philip T. Metzger, Stephen Huff, and Luke B. Roberson, “Lunar soil erosion physics for landing rockets on the Moon,” paper no. 4122, Proceedings of the Joint Annual Meeting of the Lunar Exploration Analysis Group (LEAG), the International Lunar Exploration Working Group (ILEWG) Conference on Exploration and Utilization of the Moon (ICEUM) and the Space Resources Roundtable (SRR), Cape Canaveral, Florida, October 28-31, 2008.
  23. Smith, David J., Luke B. Roberson, Rob Mueller, and Phil Metzger, “Rapidly deployable blast barriers for lunar surface operations,” paper no. 4045, Proceedings of the Joint Annual Meeting of the Lunar Exploration Analysis Group (LEAG), the International Lunar Exploration Working Group (ILEWG) Conference on Exploration and Utilization of the Moon (ICEUM) and the Space Resources Roundtable (SRR), Cape Canaveral, Florida, October 28-31, 2008.
  24. Metzger, Philip T., John E. Lane, Christopher D. Immer, and Sandra Clements, “Cratering and blowing soil by rocket engines during lunar landings,” in Proceedings of the 6th International Conference on Case Histories in Geotechnical Engineering, Arlington, VA, August 11-16, 2008.
  25. Metzger, Philip T., John E. Lane, and Christopher D. Immer, “Modification of Roberts’ theory for rocket exhaust plumes eroding lunar soil,” in Proceedings of the 11th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments (Long Beach, California), Mar. 3-5, 2008.
  26. Lane, John E., Philip T. Metzger, and Christopher D. Immer, “Lagrangian trajectory modeling of lunar dust particles,” in Proceedings of the 11th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments (Long Beach, California), Mar. 3-5, 2008.
  27. Immer, Christopher D., Philip T. Metzger, and John E. Lane, “Apollo Video Photogrammetry Estimation of Plume Impingement Effects,” in Proceedings of the 11th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments (Long Beach, California), Mar. 3-5, 2008.
  28. Metzger, Philip T., et al., “Cratering of Soil by Impinging Jets of Gas with Applications to Landing Rockets on Planetary Surfaces,” in Proceedings of the 18th Engineering Mechanics Division Conference 2007, Blacksburg, VA, June 3-6, 2007.
  29. Metzger, Philip T., “An Extension of Boltzmann’s H Theorem for the Stress in Granular Materials with Implications for a New Modeling Approach,” in Proceedings of the 18th Engineering Mechanics Division Conference 2007, Blacksburg, VA, June 3-6, 2007.
  30. Metzger, P.T., C.M. Donahue, C.D. Immer, and B.T. Vu, “Dynamical Scaling of Jet-Induced Crater Formation in a Granular Bed,” in Proceedings of the Fifth World Congress of Particle Technology, Orlando, FL, April 2006.
  31. Helenbrook, Brian T., Hayley H. Shen, Michael P. Powers, and Philip T. Metzger, “Continuum modeling and discrete element simulations of elastic-quasi-static granular flow in a compressing slot,” in Proceedings of the Fifth World Congress of Particle Technology, Orlando, FL, April 2006.
  32. Metzger, P.T., C. Donahue, R. Haehnel, C. Immer, and B. Vu, “Rocket Exhaust Cratering: Transient Effects from Abrupt Application of Jet,” in Proceedings of Earth & Space 2006, 10th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments, League City, Texas, Mar.5-8, 2006.
  33. Donahue, C.M., P.T. Metzger, and C.D. Immer, “Functional Scaling for the Cratering of a Granular Surface by an Impinging Jet,” in Proceedings of Earth & Space 2006, 10th Biennial ASCE Aerospace Division International Conference on Engineering, Construction and Operations in Challenging Environments, League City, Texas, Mar.5-8, 2006.
Technical Reports

  1. Gump, David, et al, “Extruded Clay-Based Regoliths for Construction on Mars, Phobos, and NEAs: Low-heat fabrication free of terrestrial additives, Phase I Final Report,” contract NNX16CK06P, Deep Space Industries, Moffett Field, CA, Dec. 9, 2016.
  2. Amara L. Graps, JL Galache, Vishnu Reddy, Martin Elvis, Andy Rivkien, Paolo Tanga, Migo Mueller, Philippe Blondel, Patrick Michel, Henry Hsieh, Petr Pravec, Alex Parker, Pauli Laine, Philip Metzger, Daniel Britt, Philipp Maier, Bill Hartmann, Jan Thimo Grundmann, “Questions from the Asteroid Miners,” Asteroid Science Intersections with In-Space Mine Engineering 2016, Luxembourg City, 21-22 September 2016.
  3. Chris Culbert, Diane Linne, Faith Chandler, Leslie Alexander, Sharon Jefferies, Kriss J Kennedy, Mark Lupisella, Phil Metzger, Nathan Moore, and Karen Taminger, “NASA Technology Roadmaps, TA 7: Human Exploration Destination Systems”, NASA, July 2015.
  4. Metzger, Philip T., et al., “WINE: The World Is Not Enough, Phase I Final Demonstration Report,” NASA Contractor Report, contract NNX15CK13P, Honeybee Robotics Spacecraft Mechanisms Corporation, Pasadena, CA, June 17, 2016.
  5. Gump, David, et al, “Task-Specific Asteroid Simulants for Ground Testing, Phase I Final Report,” NASA Contractor Report, contract NNX15CK10P, Deep Space Industries, Moffett Field, CA, December 2015.
  6. Metzger, Philip T., “Plume Interactions with Asteroid Regolith during Proximity Operations,” NASA report to Asteroid Return Mission (ARM) Alternative Study (October 2014).
  7. Metzger, Philip T., “Estimation of Regolith Backscatter during OSIRIS-REx Sample Capture,” NASA report to OSIRIS-REx Project (2014).
  8. Metzger, Philip T., “Planetary Ice Mining by Down-Hole Energy Injection,” NASA New Technology Report 1340291432 (June 2012).
  9. “NASA’s Recommendations to Space-Faring Entities: How to Protect and Preserve the Historic and Scientific Value of U.S. Government Lunar Artifacts,” NASA (July 2011).
  10. Lane, John E., Philip T. Metzger, and Allen R. Wilkinson, “A Review of Discrete Element Method (DEM) Particle Shapes and Size Distributions for Lunar Soil,” NASA TM- 2010-216257, NASA Glenn Research Center, Cleveland, OH (December 2010).
  11. Philip T. Metzger, Greg Galloway, James Mantovani, Kris Zacny and Jack Craft, “Low Force Icy Regolith Penetration Technology,” NASA/Technical Memorandum 2011-216302.
  12. Clegg, Ryan N., Philip T. Metzger, Luke Roberson, "Compaction and Magnetic Flow Properties of Lunar Soil," Motivating Undergraduates in Science and Technology (MUST) Fellowship Final Report, NASA Kennedy Space Center, August 2009.
  13. Abilleira, F; Acuna, M; Alena, R; Alonso, J; Anbar, A; Arnold, J; Arnold, J; Baalen, M; Bagdigian, B; Bearden, D; Beaty, D; Bell, M; Bitten, R; Blattnig, S; Borowski, S; Bose, D; Bowles, J; Briggs, G; Bryant, L; Bubenheim, D; Burt, I; Cataldo, B; Cerimele, C; Charles, J; Cheatwood, N; Clancey, B; Clancy, R; Clowdsley, M; Cockell, C; Conley, C; Connerney, J; Cooke, D; Coughlin, S; Craig, D; Crane, T; Cravens, T; Crisp, V; Cruz, J; Cucinotta, F; Culbert, C; Culver, G; Delory, G; Dickson, J; Doran, P; Doyle, M; Drake, B; Drake, B; Durda, D; Durston, D; Dwyer, A; Easter, R; Edwards, C; Elliott, J; Elphic, R; Engelund, W; Epp, C; Eppler, D; Feingold, H; Feldman, S; Fernandez-Remolar, D; Fisher, D; Forbes, J; Fragola, J; Gabriele, G; Gage, P; Garcia, J; Garvin, J; Gernhardt, M; Giles, B; Glass, B; Gonzales, A; Gonzales, A; Goodwinn, S; Griffin, B; Gruener, J; Guetersloh, S; Hassler, D; Hawes, M; Head, J; Health, H; Heldmann, J; Helper, M; Hill, J; Hipkin, V; Hoffman, S; James, A; Jitendra, J; Jones, H; Jones, J; Jordan, F; Karcz, J; Kerschman, R; Keyes, J; Killeen, T; Kinney, D; Kinney, D; Kliss, M; Landis, R; Lane, M; Larson, B; Laub, B; Laurini, K; Lavoie, T; Lee, P; Lemke, L; Leung, R; Levine, J; Levy, J; Lim, D; Liskowsky, D; Luhmann, J; Luna, B; Mahaffy, P; Manning, R; Manzella, D; Mattingly, R; McCann, R; McCuistion, D; McKay, C; Menrad, R; Metzger, P; Moersch, J; Moore, A; Moore, C; Moore, T; Morris, K; Mueller, R; Mulqueen, J; Murphy, N; Noreen, G; Ondler, R; Ostrach, L; Paxton, L; Peach, L; Plachta, D; Porter, L; Posner, A; Poulet, F; Powell, R; Price, H; Purves, L; Putney, B; Quinn, S; Radcliffe, T; Radzanowski, D; Rice, J; Roman, M; Russo, C; Rutledge, R; Salamon, M; Sander, M; Sanders, J; Schenker, P; Schier, J; Semones, E; Shah, B; Simonsen, L; Slavin, J; Snook, K; Squyres, S; Stoker, C; Sulzman, F; Sumrall, P; Tahu, G; Tauber, M; Tigges, M; Toups, L; Tran, H; Tri, T; Tripathi, A; Troutman, P; Tyburski, T; Venkatapathy, E; Venkatapathy, E; Volosin, J; Waits, D; Watson, K; Webbon, B; Westhelle, C; Wright, H; Wright, M; Yoder, G; Yoon, S; Zapp, E; Zavaleta, J; Zimbelman, J, Mars Design Reference Architecture 5.0, Drake, Brett, Ed., NASA SP-2009-566 (2009).
  14. Metzger, Philip T., and Robert P. Mueller, “Landing Plume Effects,” in Mars Design Reference Architecture 5.0, Addendum, NASA SP-2009-566-ADD, pp. 234-248 (2009).
  15. Metzger, Philip T., “The Physics of Rocket Exhaust Cratering,” in Center Director's Discretionary Fund 2005 Annual Report, NASA TP-2007-214731, pp. 47-64 (2007).
  16. Youngquist, Robert C., Philip T. Metzger, and John E. Lane, “Particle Beam Propulsion Using a Cluster of Electrostatic Conducting Spheres,” NASA New Technology Report 5020479 (2006).
  17. Beaty, D.W., Snook, K., Allen, C.C., Eppler, D., Farrell, W.M., Heldmann, J., Metzger, P., Peach, L., Wagner, S.A., and Zeitlin, C., “An Analysis of the Precursor Measurements of Mars Needed to Reduce the Risk of the First Human Missions to Mars,” unpublished report of the Mars Exploration Program Analysis Group (MEPAG), http://mepag.jpl.nasa.gov/reports/index.html (2005).
  18. Metzger, Philip T., John E. Lane, and Robert C. Youngquist, “Asymmetric Electrostatic Radiation Shielding for Spacecraft,” NASA Tech Briefs, 29 (9), p. 78 (September 2005).
  19. Metzger, Philip T. and Carly M. Donahue, “Algorithm for Analysis and Characterization of the Microstructural Stress State of Static Granular Media,” NASA New Technology Report 5019558 (2005).
  20. Moss, Thomas J., Robert C. Youngquist, and Philip T. Metzger, “Self Taring Load Cell System,” NASA New Technology Report 5019717 (2005).
  21. Metzger, Philip T., and Bruce T. Vu, “Rocket Exhaust Cratering: Lessons Learned from Viking and Apollo,” report to NASA Exploration Systems Enterprise, RFI 04212004, (May 14, 2004).
  22. Metzger, Philip T., “Software Algorithm for Predicting the Probability Distribution of Forces in Static Cohesionless Granular Media – Frictionless, Isotropic, Locally Isostatic Version,” NASA New Technology Report KSC-5019558 (2004).
  23. R. Youngquist, P. Metzger, J. Lane, “Particle beam propulsion: simulations of an electrostatic sail concept,” Research and Technology 2004 Annual Report, John F. Kennedy Space Center, (2004) pp. 6–7.
  24. Metzger, Philip T., John E. Lane, and Robert C. Youngquist, “Asymmetric Electrostatic Radiation Shielding for Spacecraft,” NASA New Technology Report KSC-12624 (2004).
  25. Metzger, Philip T., John E. Lane, and Robert C. Youngquist, “Electrostatic First Order Image Charge Calculator For Conducting Spheres with Optimizer,” NASA New Technology Report KSC-12706 (2004).
Book Chapters

  1. Metzger, Philip T., John E. Lane, Christopher D. Immer, and Sandra Clements, “Cratering and Blowing Soil by Rocket Engines During Lunar Landings,” in Lunar Settlements, ed. by Haym Benaroya (CRC Press, 2010), pp. 551-576.
Magazine Articles

  1. Metzger, Philip T., “Mining on the Moon: Take a Look at a Space Settlement of the Future,” Boys’ Life, September 2015 issue, pp. 20-23 (cover story).
  2. Metzger, Philip T., “Space, the Choice is Endless,” Physics World 19, pp. 42-43 (February, 2007).
  3. Metzger, Philip T., “Granular Mechanics and Regolith Operations Laboratory,” Tech Transfer KSC News 4 (2), pp. 6-8 (Fall/Winter 2011).
Guest Editing

  1. Journal of Aerospace Engineering 26 (1), January 2013, special issue on In Situ Resources Utilization, with Haym Benaroya and Anthony Muscatello.
  2. Journal of Aerospace Engineering 22 (1), January 2009, special issue on the 2nd Workshop on Granular Materials in Lunar and Martian Exploration, with Allen Wilkinson.
  3. Granular Matter 9 (5), 2007, special issue on the Workshop on Granular Materials in Lunar and Martian Exploration, with Robert Behringer and Allen Wilkinson.