47 citations · 162 across the 15 of their papers we have counts for
16 papers
Lunar Cold Trap Contamination by Landing Vehicles
Scott T. Shipley, John E. Lane, Philip T. Metzger
Tools have been developed to model and simulate the effects of lunar landing vehicles on the lunar environment, mostly addressing the effects of regolith erosion by rocket plumes a…
Further Analysis on the Mystery of the Surveyor III Dust Deposits
John Lane, Steven Trigwell, Paul Hintze +1
The Apollo 12 lunar module (LM) landing near the Surveyor III spacecraft at the end of 1969 has remained the primary experimental verification of the predicted physics of plume eje…
Lagrangian Trajectory Modeling of Lunar Dust Particles
John E. Lane, Philip T. Metzger, Christopher D. Immer +1
A mathematical model and software implementation developed to predict trajectories of single lunar dust particles acted on by a high velocity gas flow is discussed. The model uses…
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…
A phenomenological relationship between vertical air motion and disdrometer derived A-b coefficients
John Lane, Takis Kasparis, Silas Michaelides +1
Using the well-known Z-R power law, Z = A R^b, A-b parameters derived from a single disdrometer are readily found and can provide useful information to study rainfall drop size dis…
Estimation of Apollo lunar dust transport using optical extinction measurements
John E. Lane, Philip T. Metzger
A technique to estimate mass erosion rate of surface soil during landing of the Apollo Lunar Module (LM) and total mass ejected due to the rocket plume interaction is proposed and…
A Hail Size Distribution Impact Transducer
John E. Lane, Robert C. Youngquist, William D. Haskell +1
An active impact transducer has been designed and tested for the purpose of monitoring hail fall in the vicinity of the Space Shuttle launch pads. An important outcome of this desi…
In Situ Disdrometer Calibration Using Multiple DSD Moments
John Lane, Takis Kasparis, Philip Metzger +1
In situ calibration is a proposed strategy for continuous as well as initial calibration of an impact disdrometer. In previous work, a collocated tipping bucket had been utilized t…
Photogrammetry and ballistic analysis of a high-flying projectile in the STS-124 space shuttle launch
Philip T. Metzger, John E. Lane, Robert A. Carilli +2
A method combining photogrammetry with ballistic analysis is demonstrated to identify flying debris in a rocket launch environment. Debris traveling near the STS-124 Space Shuttle…
Electric Potential Due to a System of Conducting Spheres
Philip T. Metzger, John E. Lane
Equations describing the complete series of image charges for a system of conducting spheres are presented. The method of image charges, originally described by J. C. Maxwell in 18…
Spatial and Temporal Extrapolation of Disdrometer Size Distributions Based on a Lagrangian Trajectory Model of Falling Rain
John E. Lane, Takis Kasparis, Philip T. Metzger +1
Methodologies to improve disdrometer processing, loosely based on mathematical techniques common to the field of particle flow and fluid mechanics, are examined and tested. The inc…