97 citations · 651 across the 39 of their papers we have counts for
10 papers · 1 filter
Moons Are Planets: Scientific Usefulness Versus Cultural Teleology in the Taxonomy of Planetary Science
Philip T. Metzger, William M. Grundy, Mark Sykes +5
We argue that taxonomical concept development is vital for planetary science as in all branches of science, but its importance has been obscured by unique historical developments.…
Apollo Video Photogrammetry Estimation of Plume Impingement Effects (conference version)
Christopher Immer, John Lane, Philip Metzger +1
The Constellation Project's planned return to the moon requires numerous landings at the same site. Since the top few centimeters are loosely packed regolith, plume impingement fro…
Scaling of Erosion Rate in Subsonic Jet Experiments and Apollo Lunar Module Landings
Philip T. Metzger, John E. Lane, Christopher D. Immer +5
Small scale jet-induced erosion experiments are useful for identifying the scaling of erosion with respect to the various physical parameters (gravity, grain size, gas velocity, ga…
Lunar Dust Particles Blown By Lander Engine Exhaust in Rarefied and Compressible Flow
John E. Lane, Philip T. Metzger, Jeffrey W. Carlson
Previously we presented a numerical model that predicts trajectories of lunar dust, soil, and gravel blown by the engine exhaust of a lunar lander. The model uses the gas density,…
ISRU Implications for Lunar and Martian Plume Effects
Philip T. Metzger, Xiaoyi Li, Christopher D. Immer +1
Experiments, analyses, and simulations have shown that the engine exhaust plume of a Mars lander large enough for human spaceflight will create a deep crater in the martian soil, b…
Modification of Roberts' Theory for Rocket Exhaust Plumes Eroding Lunar Soil
Philip T. Metzger, John E. Lane, Christopher D. Immer
Roberts' model of lunar soil erosion beneath a landing rocket has been updated in several ways to predict the effects of future lunar landings. The model predicts, among other thin…
Cratering of Soil by Impinging Jets of Gas, with Application to Landing Rockets on Planetary Surfaces
Philip T. Metzger, Bruce T. Vu, D. E. Taylor +9
Several physical mechanisms are involved in excavating granular materials beneath a vertical jet of gas. These occur, for example, beneath the exhaust plume of a rocket landing on…
Empirical Scaling Laws of Rocket Exhaust Cratering
Carly M. Donohue, Philip T. Metzger, Christopher D. Immer
When launching or landing a spacecraft on the regolith of a terrestrial surface, special attention needs to be paid to the rocket exhaust cratering effects. If the effects are not…
Furthering Asteroid Resource Utilization in the Next Decade through Technology Leadership
Chris Lewicki, Amara Graps, Martin Elvis +2
A significant opportunity for synergy between pure research and asteroid resource research exists. We provide an overview of the state of the art in asteroid resource utilization,…
Understanding and Mitigating Plume Effects During Powered Descents on the Moon and Mars
Ryan N. Watkins, Philip T. Metzger, Manish Mehta +10
This 2020 Decadal Survey White Paper reviews what is known about lunar and martian lander Plume Surface Interactions (PSI) during powered descent. This includes an overview of the…