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Planetary Scientist
240-228-2903
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B.Eng., Aerospace Systems Engineering1990, Southampton University, UK
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Ph.D., Space Sciences1994, University of Kent, UK
I have wide-ranging interests in science and engineering, especially relating to planetary science (with an emphasis on surface/atmosphere interactions on Titan, Venus and Mars), and doing science from innovative sensor platforms such as probes, landers, balloons, penetrators, and boats. I have been involved in the life cycle of flight investigations including concept formulation, mission and system design, science planning, observation design, instrument development, data analysis, and publication of results. My experience includes radar remote sensing, in-situ instrumentation, geomorphology, meteorology, oceanography, vehicle dynamics and trajectory measurements, and astrobiology. I am a NASA Participating Scientist on the JAXA Akatsuki Venus Climate Orbiter, and on InSight at Mars, and a Co-I for the SuperCam microphone experiment on Perseverance, and lead the Atmospheric Structure Investigation on the proposed DAVINCI+ Venus probe, currently in a Phase A study. I am the Dragonfly Mission Architect, a role that involves considering how the vehicle and its payload will interact with the Titan environment, and developing engineering specifications for that environment. I have authored >300 popular was well as technical publications ranging from brief articles and papers to book-length works. My terrestrial fieldwork has focussed on desert areas, studying dust devils and sand dunes. My books include "Dune Worlds: How Wind-Blown Sand Shapes Planetary Landscapes" (Springer, 2014), "Space Systems Failures" (Springer 2006), "Titan Unveiled" (Princeton, 2008), and "Exploring Planetary Climate" (CUP, 2019), Saturn's Moon Titan Owners' Workshop Manual (Haynes, 2020).
Notable Awards and Leadership
| Year(s) | Description |
|---|---|
| 2003 - Present | International Planetary Probe Workshop organizing committee |
| 2020 | AL Seiff Memorial Award, International Planetary Probe Workshop |
| 2019 | ASLI CHOICE Award. Best Atmospheric Science book (History Category) for "Exploring Planetary Climate" |
| 2018 | NASA Group Achievement Award, Next-Generation RTG |
| 2007, 2008, 2009, 2009, 2015, 2018 | NASA Group Achievement Awards (Cassini) |
| 2009, 2012, 2014, 2015 | APL Publication Award |
| 2007 - 2011 | NRC Committee on the Origins and Evolution of Life (COEL) |
| 2007 | AGU Sagan Lecturer |
| 1998 | NASA Group Achivement Award (Huygens) |
| 1994 | Luigi Napolitano Award, International Astronautical Federation |
Scholarly Publications
An acoustic investigation of the near-surface turbulence on Mars
The Journal of the Acoustical Society of America, 2024
Taking Titan’s Boreal Pole Temperature: Evidence for Evaporative Cooling in Ligeia Mare
The Astrophysical Journal, 2024
Comparing the Dust Devil Vortex Populations on Mars and Earth
2024
The effects of airflow velocity and particle size on dust accumulation for Titan dust simulants on transparent windows
Planetary and Space Science, 2023
Palaeoclimate evolution on Titan after episodic massive methane outgassing simulated by a global climate model
2023
Wind and Turbulence Observations With the Mars Microphone on Perseverance
Journal of Geophysical Research: Planets, 2023
Parachute Deployment on Venus :Recovery of “Lost” Pioneer Venus Large Probe Entry Accelerometer Data
Advances in Space Research, 2023
The sounds of a helicopter on Mars
Planetary and Space Science, 2023
Titan’s North–South Haze Asymmetry Ratio and Boundary at Visible Wavelengths over the Cassini Mission
The Planetary Science Journal, 2023
Venus Atmospheric Structure Investigation (VASI) on the DAVINCI Probe
2023
Vortices and Dust Devils at Jezero crater after one year of measurements with MEDA on Mars 202
2023
The Aeolian Activity at InSight Over Two Martian Years
2023
Systematic catalog of Martian convective vortices observed by InSight
2023
Analytic rock abundance distributions and their application to spacecraft landing hazards
Planetary and Space Science, 2023
Slopes on Titan and application to spacecraft landing safety
Planetary and Space Science, 2023
Description of Martian Convective Vortices Observed by InSight and Implications for Vertical Vortex Structure and Subsurface Physical Properties
Journal of Geophysical Research: Planets, 2023
Gentle Perseverance Lifts the Veil on Martian Dust
Journal of Geophysical Research: Planets, 2023
Investigating Diurnal and Seasonal Turbulence Variations of the Martian Atmosphere Using a Spectral Approach
The Planetary Science Journal, 2023
Titan's surface bearing strength: Contact force models for the Dragonfly rotorcraft lander
Planetary and Space Science, 2022
Turbulence for extraterrestrial aviation: Gust specification for Dragonfly's powered flights
Planetary and Space Science, 2022
First Sounds from Mars : Results of the Microphones on Perseverance
2022
In situ recording of Mars soundscape
Nature, 2022
Investigation of magnetic field signals during vortex-induced pressure drops at InSight
Planetary and Space Science, 2022
Turbulence Models for Titan Exploration
2022
Landscapes of the Argentine Puna Reveal Conditions and Processes on Wind-Eroded Planetary Surfaces
2022
Enabling Subsurface Exploration of Ocean Worlds: Technology Developments for Sending Signals Through the Ice (STI) 
2022
An RF Concept for Communicating with a Subsurface Cryobot on an Ocean World
2022
Sand Transport on Titan: A Sticky Problem
Geophysical Research Letters, 2022
Composition, Roughness, and Topography from Radar Backscatter at Selk Crater, the Dragonfly Landing Site
The Planetary Science Journal, 2022
Wind and turbulence observations with the Mars microphone on Perseverance
2022
Lifting and transport of Martian dust by the Ingenuity helicopter rotor downwash as observed by high-speed imaging from the Perseverance rover
2022
Acoustics Reveals Short‐Term Air Temperature Fluctuations Near Mars' Surface
Geophysical Research Letters, 2022
Winds at the Mars 2020 Landing Site. 2. Wind Variability and Turbulence
Journal of Geophysical Research: Planets, 2022
Lifting and Transport of Martian Dust by the Ingenuity Helicopter Rotor Downwash as Observed by High‐Speed Imaging From the Perseverance Rover
Journal of Geophysical Research: Planets, 2022
The sound of a Martian dust devil
Nature Communications, 2022
A Study of Daytime Convective Vortices and Turbulence in the Martian Planetary Boundary Layer Based on Half‐a‐Year of InSight Atmospheric Measurements and Large‐Eddy Simulations
Journal of Geophysical Research: Planets, 2021
Large-Eddy Simulation of Titan’s near-surface atmosphere: Convective turbulence and flow over dunes with application to Huygens and Dragonfly
Icarus, 2021
Vortex‐Dominated Aeolian Activity at InSight's Landing Site, Part 2: Local Meteorology, Transport Dynamics, and Model Analysis
Journal of Geophysical Research: Planets, 2021
Constraining Martian Regolith and Vortex Parameters From Combined Seismic and Meteorological Measurements
Journal of Geophysical Research: Planets, 2021
Selection and Characteristics of the Dragonfly Landing Site near Selk Crater, Titan
The Planetary Science Journal, 2021
A complete Martian year of atmospheric observations with InSight instruments
2021
Detection of charged organic grains at the surface of Titan with the EFIELD/DraGMet sensor on board Dragonfly
2021
An optical flash on Venus detected by the AKATSUKI spacecraft
2021
The Challenging Depths of Titan's Seas
Journal of Geophysical Research: Planets, 2021
Prediction of aerodynamically-triggered condensation: Application to the Dragonfly rotorcraft in Titan's atmosphere
Aerospace Science and Technology, 2021
Near surface properties derived from Phobos transits with HP RAD³ on InSight, Mars
2021
Vortex‐Dominated Aeolian Activity at InSight's Landing Site, Part 1: Multi‐Instrument Observations, Analysis, and Implications
Journal of Geophysical Research: Planets, 2021
Observation of Cassini’s Entry into Saturn: No Detection, and Lessons Learned
Research Notes of the AAS, 2021
Science Goals and Objectives for the Dragonfly Titan Rotorcraft Relocatable Lander
The Planetary Science Journal, 2021
Gravitational atmospheric tides as a probe of Titan’s interior: application to Dragonfly
2021
Detection of sand grains blown by Titan surface winds with the DraGMet/EFIELD sensor on Dragonfly
2021
Atmospheric Science with the SuperCam Microphone on the Perseverance Rover
2021
The Sound of the Wind on Mars: Preliminary Wind Speed Analysis with the SuperCam Microphone on Perseverance
2021
Measurement of Titan’s surface permittivity with the DraGMet/DIEL sensor on Dragonfly
2021
Near Surface Properties of Martian Regolith Derived From InSight HP3‐RAD Temperature Observations During Phobos Transits
Geophysical Research Letters, 2021
Wind and surface roughness considerations for seismic instrumentation on a relocatable lander for Titan
Planetary and Space Science, 2021
Lander and rover histories of dust accumulation on and removal from solar arrays on Mars
Planetary and Space Science, 2021
Search for Infrasound Signals in InSight Data Using Coupled Pressure/Ground Deformation Methods
Bulletin of the Seismological Society of America, 2021
Paleoclimate Evolution on Titan After Episodic Massive Methane Outgassing Simulated by a Global Climate Model
Journal of Geophysical Research: Planets, 2021
First Sounds from Mars
2021
Maunder’s Work on Planetary Habitability in 1913: Early Use of the term “Habitable Zone” and a “Drake Equation” Calculation
Research Notes of the AAS, 2020
Geophysical observations of Phobos transits by InSight
2020
Key Technologies and Instrumentation for Subsurface Exploration of Ocean Worlds
Space Science Reviews, 2020
Prospects for Detecting Volcanic Events with Microwave Radiometry
Remote Sensing, 2020
Martian Ripples Making a Splash
Journal of Geophysical Research: Planets, 2020
Geophysical Observations of Phobos Transits by InSight
Geophysical Research Letters, 2020
Evidence of diurnal variations of Titan’s near-surface temperature and of a cooling effect of the northern seas from the Cassini radar/radiometer
2020
The atmosphere of Mars as observed by InSight
Nature Geoscience, 2020
Dust Devils on Titan
Journal of Geophysical Research: Planets, 2020
Schumann Resonance on Titan : Huygens Observations Critically Re-Assessed and prospects for the Dragonfly Mission
2020
Daytime and nighttime turbulence on Mars monitored by InSight
2020
Good review
2020
Scientific Observations With the InSight Solar Arrays: Dust, Clouds, and Eclipses on Mars
Earth and Space Science, 2020
On‐Deck Seismology: Lessons from InSight for Future Planetary Seismology
Journal of Geophysical Research: Planets, 2020
Monitoring of Dust Devil Tracks Around the InSight Landing Site, Mars, and Comparison With In Situ Atmospheric Data
Geophysical Research Letters, 2020
A Transit Lightcurve of Deimos, Observed with the InSight Solar Arrays
Research Notes of the AAS, 2020
Aeolian Changes at the InSight Landing Site on Mars: Multi-instrument Observations
2020
How far is far enough? Requirements derivation for planetary mobility systems
Advances in Space Research, 2020
MaxEP is the only 'true' steady state?
2020
A Thermal Inertia Map of Titan
Journal of Geophysical Research: Planets, 2019
Hydrogen sensing in Titan's atmosphere: Motivations and techniques
Planetary and Space Science, 2019
Calculating risk and payoff in planetary exploration and life detection missions
Advances in Space Research, 2019
A model intercomparison of Titan's climate and low-latitude environment
Icarus, 2019
Seismic signal from waves on Titan's seas
Earth and Planetary Science Letters, 2019
Constraints on Venus Lightning From Akatsuki's First 3 Years in Orbit
Geophysical Research Letters, 2019
Paper has a good structure, but fails to quantify the dynamics
2019
Yardangs and Dunes: Minimum- and Maximum-Dissipation Aeolian Landforms
2019
Modeling of Seasonal Lake Level Fluctuations of Titan's Seas/Lakes
Journal of Geophysical Research: Planets, 2019
One dimensional effervescence modeling of an extraterrestrial submarine in the Saturn Titan Seas
Planetary and Space Science, 2019
Expected Seismicity and the Seismic Noise Environment of Europa
Journal of Geophysical Research: Planets, 2018
Venus atmospheric structure and dynamics from the VEGA lander and balloons: New results and PDS archive
Icarus, 2018
Discharge current measurements on Venera 13 & 14 – Evidence for charged aerosols in the Venus lower atmosphere?
Icarus, 2018
Electric properties of dust devils
Earth and Planetary Science Letters, 2018
A numerical study of tides in Titan′s northern seas, Kraken and Ligeia Maria
Icarus, 2018
Morphological evidence that Titan’s southern hemisphere basins are paleoseas
Icarus, 2018
Lightning detection on Venus: a critical review
Progress in Earth and Planetary Science, 2018
Atmospheric test environments for planetary in-situ missions: Never quite “Test as you fly”
Advances in Space Research, 2018
Seismic Wave Propagation in Icy Ocean Worlds
Journal of Geophysical Research: Planets, 2018
Viking‐2 Seismometer Measurements on Mars: PDS Data Archive and Meteorological Applications
Earth and Space Science, 2017
Topographic Constraints on the Evolution and Connectivity of Titan's Lacustrine Basins
Geophysical Research Letters, 2017
Titan's Topography and Shape at the End of the Cassini Mission
Geophysical Research Letters, 2017
Geophysical investigations of habitability in ice-covered ocean worlds
Journal of Geophysical Research: Planets, 2017
Europa ocean sampling by plume flythrough: Astrobiological expectations
Icarus, 2016
Probing Pluto's underworld: Ice temperatures from microwave radiometry decoupled from surface conditions
Icarus, 2016
Observations of the surface of Titan by the Radar Altimeters on the Huygens Probe
Icarus, 2016
Heuristic estimation of dust devil vortex parameters and trajectories from single-station meteorological observations: Application to InSight at Mars
Icarus, 2016
Some modest improvements should be made
2016
Surface winds on Venus: Probability distribution from in-situ measurements
Icarus, 2016
Energy cost of acquiring and transmitting science data on deep-space missions
Journal of Spacecraft and Rockets, 2015
A multiyear dust devil vortex survey using an automated search of pressure time series
Journal of Geophysical Research E: Planets, 2015
Exploring the depths of Kraken Mare - Power, thermal analysis, and ballast control for the Saturn Titan submarine
Cryogenics, 2015
Dust devil height and spacing with relation to the martian planetary boundary layer thickness
Icarus, 2015
Detecting volcanism on Titan and Venus with microwave radiometry
Icarus, 2015
Dust devil track survey at Elysium Planitia, Mars: Implications for the InSight landing sites
Icarus, 2015
Engineering notes: Io volcanic plumes: Spacecraft flythrough hazard evaluation
Journal of Spacecraft and Rockets, 2015
Dust devils and dustless vortices on a desert playa observed with surface pressure and solar flux logging
GeoResJ, 2015
Dust devil signatures in infrasound records of the International Monitoring System
Geophysical Research Letters, 2015
Instrumented splashdown testing of a scale model Titan Mare Explorer (TiME) capsule
Aeronautical Journal, 2015
Seakeeping on Ligeia Mare: Dynamic response of a floating capsule to waves on the hydrocarbon seas of Saturn's moon titan
Johns Hopkins APL Technical Digest (Applied Physics Laboratory), 2015
Probabilistic constraints from existing and future radar imaging on volcanic activity on Venus
Planetary and Space Science, 2015
Laboratory measurements of cryogenic liquid alkane microwave absorptivity and implications for the composition of Ligeia Mare, Titan
Geophysical Research Letters, 2015
Material transport map of Titan: The fate of dunes
Icarus, 2015
Fluvial erosion as a mechanism for crater modification on Titan
Icarus, 2015
In-situ measurement of dust devil activity at La Jornada Experimental Range, New Mexico, USA
Aeolian Research, 2015
Seismometer detection of dust devil vortices by ground tilt
Bulletin of the Seismological Society of America, 2015
Gamma rays and cosmic rays at Venus: The Pioneer Venus gamma ray detector and considerations for future measurements
Planetary and Space Science, 2015
Meteorological insights from planetary heat flow measurements
Icarus, 2015
The restless rocks of Racetrack Playa
Physics World, 2015
Temperatures, thermal structure, and behavior of eruptions at Kilauea and Erta Ale volcanoes using a consumer digital camcorder
GeoResJ, 2015
The tectonics of Titan: Global structural mapping from Cassini RADAR
Icarus, 2015
The electrical properties of Titan's surface at the Huygens landing site measured with the PWA-HASI Mutual Impedance Probe. New approach and new findings
Icarus, 2015
Twilight on Ligeia: Implications of communications geometry and seasonal winds for exploring Titan's seas 2020-2040
Advances in Space Research, 2015
Titan's surface at 2.18-cm wavelength imaged by the Cassini RADAR radiometer: Results and interpretations through the first ten years of observation
Icarus, 2015
Touchdown on Venus: Analytic wind models and a heuristic approach to estimating landing dispersions
Planetary and Space Science, 2015
Solar panel clearing events, dust devil tracks, and in-situ vortex detections on Mars
Icarus, 2015
Voyage across Ligeia Mare: Mechanics of sailing on the hydrocarbon seas of Saturn's Moon, Titan
Ocean Engineering, 2015
Sun-stirred Kraken Mare: Circulation in Titan's seas induced by solar heating and methane precipitation
Icarus, 2015
Wind-driven circulation in Titan's seas
Journal of Geophysical Research E: Planets, 2015
Compact and inexpensive kite apparatus for geomorphological field aerial photography, with some remarks on operations
GeoResJ, 2014
Elevation dependence of bedform wavelength on Tharsis Montes, Mars: Atmospheric density as a controlling parameter
Icarus, 2014
Elevation distribution of Titan's craters suggests extensive wetlands
Icarus, 2014
A Barometric Survey of Dust-Devil Vortices on a Desert Playa
Boundary-Layer Meteorology, 2014
Declining rock movement at Racetrack Playa, Death Valley National Park: An indicator of climate change?
Geomorphology, 2014
A simple webcam spectrograph
American Journal of Physics, 2014
Buoyant thermal plumes from planetary landers and rovers: Application to sizing of meteorological masts
Planetary and Space Science, 2014
A radar map of Titan Seas: Tidal dissipation and ocean mixing through the throat of Kraken
Icarus, 2014
Trail formation by ice-shoved "sailing stones" observed at Racetrack Playa, Death Valley National Park
2014
Oceanography on Saturn's moon, Titan
Sea Technology, 2014
Implications of dune pattern analysis for Titan's surface history
Icarus, 2014
MASER: A mars meteorology and seismology mini-network mission concept enabled by milliwatt-RPS
IEEE Aerospace Conference Proceedings, 2014
Numerical simulation of tides and oceanic angular momentum of Titan's hydrocarbon seas
Icarus, 2014
Iapetus' near surface thermal emission modeled and constrained using Cassini RADAR Radiometer microwave observations
Icarus, 2014
Global mapping and characterization of Titan's dune fields with Cassini: Correlation between RADAR and VIMS observations
Icarus, 2014
Growth mechanisms and dune orientation on Titan
Geophysical Research Letters, 2014
Modeling microwave backscatter and thermal emission from linear dune fields: Application to Titan
Icarus, 2014
Modeling the SAR backscatter of linear dunes on Earth and Titan
Icarus, 2014
Gravity waves in Titan's lower stratosphere from Huygens probe in situ temperature measurements
Icarus, 2014
The bathymetry of a Titan sea
Geophysical Research Letters, 2014
Rocks of ages
New Scientist, 2014
Physics of saltation and sand transport on Titan: A brief review
Icarus, 2014
The exploration of Titan with an orbiter and a lake probe
Planetary and Space Science, 2014
Surface of Ligeia Mare, Titan, from Cassini altimeter and radiometer analysis
Geophysical Research Letters, 2014
Silence on Shangri-La: Attenuation of Huygens acoustic signals suggests surface volatiles
Planetary and Space Science, 2014
Understanding the evolution of Titan's surface, interior, and atmosphere
Eos, 2014
Sliding rocks on Racetrack Playa, Death Valley National Park: First observation of rocks in motion
PLoS ONE, 2014
The flushing of Ligeia: Composition variations across Titan's seas in a simple hydrological model
Geophysical Research Letters, 2014
Transient features in a Titan sea
Nature Geoscience, 2014
Vortex encounter rates with fixed barometer stations: Comparison with visual dust devil counts and large-eddy simulations
Journal of the Atmospheric Sciences, 2014
Supplementary material to "Trail formation by ice-shoved "sailing stones" observed at Racetrack Playa, Death Valley National Park"
2014
Oceanography on Saturn's moon, Titan
OCEANS 2013 MTS/IEEE - San Diego: An Ocean in Common, 2013
Recent developments in planetary Aeolian studies and their terrestrial analogs
Aeolian Research, 2013
A global topographic map of Titan
Icarus, 2013
Crater topography on Titan: Implications for landscape evolution
Icarus, 2013
A model of variability in Titan's atmospheric structure
Planetary and Space Science, 2013
Irregular dust devil pressure drops on Earth and Mars: Effect of cycloidal tracks
Planetary and Space Science, 2013
Extraterrestrial Aeolian Landscapes
Treatise on Geomorphology, 2013
Plumbing the depths of Ligeia: Considerations for depth sounding in Titan's hydrocarbon seas
Journal of the Acoustical Society of America, 2013
Dunes on planet Tatooine: Observation of barchan migration at the Star Wars film set in Tunisia
Geomorphology, 2013
Wind driven capillary-gravity waves on Titan's lakes: Hard to detect or non-existent?
Icarus, 2013
The longevity and aspect ratio of dust devils: Effects on detection efficiencies and comparison of landed and orbital imaging at Mars
Icarus, 2013
TiME-the titan mare explorer
IEEE Aerospace Conference Proceedings, 2013
Tracking desert dust devils with in-situ pressure sensors and imaging
IEEE Aerospace Conference Proceedings, 2013
Planetary seismology—Expectations for lander and wind noise with application to Venus
2012
Formulation of a wind specification for Titan late polar summer exploration
Planetary and Space Science, 2012
Power law distribution of pressure drops in dust devils: Observation techniques and EarthMars comparison
Planetary and Space Science, 2012
Bouncing on Titan: Motion of the Huygens probe in the seconds after landing
Planetary and Space Science, 2012
AVIATR-Aerial Vehicle for In-situ and Airborne Titan Reconnaissance
Experimental Astronomy, 2012
Maximum entropy production - Full steam ahead
AIP Conference Proceedings, 2012
Thermal drilling in planetary ices: an analytic solution with application to planetary protection problems of radioisotope power sources.
Astrobiology, 2012
The growth of wind-waves in Titan's hydrocarbon seas
Icarus, 2012
Titan through time: Formation, evolution and fate
Planetary and Space Science, 2012
Titan's global crater population: A new assessment
Planetary and Space Science, 2012
Titan's fluvial valleys: Morphology, distribution, and spectral properties
Planetary and Space Science, 2012
The Huygens surface science package (SSP): Flight performance review and lessons learned
Planetary and Space Science, 2012
Winds and tides of Ligeia Mare, with application to the drift of the proposed time TiME (Titan Mare Explorer) capsule
Planetary and Space Science, 2012
Apollo capsule capsize stability during splashdown: Application of a cavity collapse model
JBIS - Journal of the British Interplanetary Society, 2011
Cassini SAR, radiometry, scatterometry and altimetry observations of Titan's dune fields
Icarus, 2011
Analog environments for a Europa lander mission
Advances in Space Research, 2011
On the statistical distribution of dust devil diameters
2011
Regional geomorphology and history of Titan's Xanadu province
Icarus, 2011
Rapid and extensive surface changes near Titan's equator: Evidence of April showers
Science, 2011
Ice rafts not sails: Floating the rocks at Racetrack Playa
American Journal of Physics, 2011
Hypsometry of Titan
Icarus, 2011
Technology development for NASA science missions: Challenges and potential opportunities
IEEE Aerospace Conference Proceedings, 2011
The evolution of Titan's detached haze layer near equinox in 2009
Geophysical Research Letters, 2011
Observations of wind ripple migration on an Egyptian seif dune using an inexpensive digital timelapse camera
Aeolian Research, 2011
Meteorological conditions at Racetrack playa, death valley National Park: Implications for rock production and transport
Journal of Applied Meteorology and Climatology, 2011
Planetary penetrators: Their origins, history and future
Advances in Space Research, 2011
Transient surface liquid in Titan's polar regions from Cassini
Icarus, 2011
Variable wind ripple migration at Great Sand Dunes National Park and preserve, observed by timelapse imaging
Geomorphology, 2011
Comment on review
Aeronautical Journal, 2010
A simple model for Radioisotope Power System performance in the Titan environment
JBIS - Journal of the British Interplanetary Society, 2010
Attitude and angular rates of planetary probes during atmospheric descent: Implications for imaging
Planetary and Space Science, 2010
A 3 km atmospheric boundary layer on Titan indicated by dune spacing and Huygens data
Icarus, 2010
Atmospheric/exospheric characteristics of icy satellites
Space Science Reviews, 2010
Active shoreline of Ontario Lacus, Titan: A morphological study of the lake and its surroundings
Geophysical Research Letters, 2010
Bathymetry and absorptivity of Titan's Ontario Lacus
Journal of Geophysical Research E: Planets, 2010
Characteristics of icy surfaces
Space Science Reviews, 2010
Linear theory of optimum hot air balloon performance - Application to Titan
Aeronautical Journal, 2010
Erratum: Determining Titan's spin state from cassini radar images (The Astronomical Journal (2008) 135 (1669))
Astronomical Journal, 2010
Impact craters on Titan
Icarus, 2010
Linear dunes on Titan and earth: Initial remote sensing comparisons
Geomorphology, 2010
Distribution and interplay of geologic processes on Titan from Cassini radar data
Icarus, 2010
Mapping products of titan's surface
Titan from Cassini-Huygens, 2010
New Cassini RADAR results for Saturn's icy satellites
Icarus, 2010
Inexpensive time-lapse digital cameras for studying transient meteorological phenomena: Dust devils and playa flooding
Journal of Atmospheric and Oceanic Technology, 2010
Geology and surface processes on titan
Titan from Cassini-Huygens, 2010
Penetrometry of granular and moist planetary surface materials: Application to the Huygens landing site on Titan
Icarus, 2010
Titan unveiled: Saturn's mysterious moon explored
Titan Unveiled: Saturn's Mysterious Moon Explored, 2010
Radar-bright channels on Titan
Icarus, 2010
Racetrack and Bonnie Claire: southwestern US playa lakes as analogs for Ontario Lacus, Titan
Planetary and Space Science, 2010
Studies of desert dust devils with a sensor network, timelapse cameras and thermal imaging
IEEE Aerospace Conference Proceedings, 2010
Radarclinometry of the sand seas of Africa's Namibia and Saturn's moon Titan
Icarus, 2010
The moon that would be a planet
Scientific American, 2010
Seasonal change on titan
Titan from Cassini-Huygens, 2010
Titan beyond cassini-huygens
Titan from Cassini-Huygens, 2010
Volatile origin and cycles: Nitrogen and methane
Titan from Cassini-Huygens, 2010
Threshold of wave generation on Titan's lakes and seas: Effect of viscosity and implications for Cassini observations
Icarus, 2010
Winds of change on Titan
Science, 2010
Analysis and interpretation of Cassini Titan radar altimeter echoes
Icarus, 2009
Global pattern of Titan's dunes: Radar survey from the Cassini prime mission
Geophysical Research Letters, 2009
Cassini RADAR sequence planning and instrument performance
IEEE Transactions on Geoscience and Remote Sensing, 2009
Rivers, lakes, dunes, and rain: Crustal processes in titan's methane cycle
Annual Review of Earth and Planetary Sciences, 2009
Cassini RADAR images at hotei arcus and western Xanadu, Titan: Evidence for geologically recent cryovolcanic activity
Geophysical Research Letters, 2009
Earth-Based support for the titan saturn system mission
Earth, Moon and Planets, 2009
Determining Titan surface topography from Cassini SAR data
Icarus, 2009
An asymmetric distribution of lakes on Titan as a possible consequence of orbital forcing
Nature Geoscience, 2009
Power law of dust devil diameters on Mars and Earth
Icarus, 2009
Titan mission studies - A historical review
JBIS - Journal of the British Interplanetary Society, 2009
Titan's surface at 2.2-cm wavelength imaged by the Cassini RADAR radiometer: Calibration and first results
Icarus, 2009
Size and shape of saturn's moon titan
Science, 2009
Smoothness of Titan's Ontario Lacus: Constraints from Cassini RADAR specular reflection data
Geophysical Research Letters, 2009
TandEM: Titan and Enceladus mission
Experimental Astronomy, 2009
The shape of saturn's moon titan from cassini radar altimeter and SAR monopulse observations
IEEE National Radar Conference - Proceedings, 2009
A review of balloon concepts for Titan
JBIS - Journal of the British Interplanetary Society, 2008
Cassini RADAR constraint on Titan's winter polar precipitation
Icarus, 2008
Bearing damage analysis by calculation of capacitive coupling between inner and outer races of a ball bearing
2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008, 2008
Atmospheric electricity hazards
Space Science Reviews, 2008
Microwave dielectric constant of Titan-relevant materials
2008
Linear theory of optimum hot air balloon performance - Application to Titan
Aeronautical Journal, 2008
Microwave dielectric constant of liquid hydrocarbons: Application to the depth estimation of Titan's lakes
Geophysical Research Letters, 2008
In situ thermal conductivity measurements of Titan's lower atmosphere
Icarus, 2008
Fluvial channels on Titan: Initial Cassini RADAR observations
Planetary and Space Science, 2008
Determining titan's spin state from cassini radar images
Astronomical Journal, 2008
Fluvial erosion and post-erosional processes on Titan
Icarus, 2008
Dunes on Titan observed by Cassini Radar
Icarus, 2008
Electrical effects on atmospheric chemistry
Space Science Reviews, 2008
Hydrocarbon lakes on Titan: Distribution and interaction with a porous regolith
Geophysical Research Letters, 2008
The changing face of Titan
2008
Titan bumblebee: A 1 kg lander-launched UAV concept
JBIS - Journal of the British Interplanetary Society, 2008
Titan Explorer
AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2008
Titan's diverse landscapes as evidenced by Cassini RADAR's third and fourth looks at Titan
Icarus, 2008
The "Billion Dollar Box" study of science missions to Saturnian satellites
IEEE Aerospace Conference Proceedings, 2008
Titan explorer: A NASA Flagship mission concept
AIP Conference Proceedings, 2008
Titan's inventory of organic surface materials
Geophysical Research Letters, 2008
Titan's surface from the Cassini RADAR radiometry data during SAR mode
Planetary and Space Science, 2008
Radar topography of domes on planetary surfaces
Icarus, 2008
Titan's rotation reveals an internal ocean and changing zonal winds
Science, 2008
Titan's surface inventory of organic materials estimated from Cassini RADAR observations
Proceedings of the International Astronomical Union, 2008
Planetary Landers and Entry Probes
2007
Cryovolcanic features on Titan's surface as revealed by the Cassini Titan Radar Mapper
Icarus, 2007
Hydrocarbon lakes on Titan
Icarus, 2007
Correlations between Cassini VIMS spectra and RADAR SAR images: Implications for Titan's surface composition and the character of the Huygens Probe Landing Site
Planetary and Space Science, 2007
Comments on "In situ atmospheric turbulence measurement using the terrestrial magnetic field - A compass for a radiosonde"
Journal of Atmospheric and Oceanic Technology, 2007
Descent motions of the Huygens probe as measured by the Surface Science Package (SSP): Turbulent evidence for a cloud layer
Planetary and Space Science, 2007
Electrical properties of Titan's surface from Cassini RADAR scatterometer measurements
Icarus, 2007
Near-infrared spectral mapping of Titan's mountains and channels
Journal of Geophysical Research E: Planets, 2007
Mountains on Titan observed by Cassini Radar
Icarus, 2007
The lakes and seas of Titan
Eos, 2007
Titan's surface from Cassini RADAR SAR and high resolution radiometry data of the first five flybys
Icarus, 2007
Titan atmosphere profiles from Huygens engineering (temperature and acceleration) sensors
Planetary and Space Science, 2007
Titan's young surface: Initial impact crater survey by Cassini RADAR and model comparison
Geophysical Research Letters, 2007
Speed of sound measurements and the methane abundance in Titan's atmosphere
Icarus, 2007
The lakes of Titan
Nature, 2007
Cassini RADAR observations of Enceladus, Tethys, Dione, Rhea, Iapetus, Hyperion, and Phoebe
Icarus, 2006
Bistatic observations of Titan's surface with the Huygens probe radio signal
Journal of Geophysical Research E: Planets, 2006
Erratum: Titan Radar Mapper observations from Cassini's T3 fly-by (Nature (2006) 441 (709-713))
Nature, 2006
Demonstration of comet sample collection by penetrator
Acta Astronautica, 2006
Ringing in the changes
New Scientist, 2006
Huygens entry emission: Observation campaign, results, and lessons learned
Journal of Geophysical Research E: Planets, 2006
Inferring the composition of the liquid surface on Titan at the Huygens probe landing site from Surface Science Package measurements
Advances in Space Research, 2006
Finite-time thermodynamics of an instrumented drinking bird toy
American Journal of Physics, 2006
Seasonal evolution of Titan's dark polar hood: Midsummer disappearance observed by the Hubble Space Telescope
Monthly Notices of the Royal Astronomical Society, 2006
Quantitative geomorphic modeling of Martian bedrock shorelines
Journal of Geophysical Research E: Planets, 2006
Mapping of Titan: Results from the first Titan radar passes
Icarus, 2006
Physical properties of Titan's surface at the Huygens landing site from the Surface Science Package Acoustic Properties sensor (API-S)
Icarus, 2006
Overview of the coordinated ground-based observations of Titan during the Huygens mission
Journal of Geophysical Research E: Planets, 2006
GCM simulation of balloon trajectories on Titan
Planetary and Space Science, 2006
The exploration of titan
Johns Hopkins APL Technical Digest (Applied Physics Laboratory), 2006
Titan's damp ground: Constraints on Titan surface thermal properties from the temperature evolution of the Huygens GCMS inlet
Meteoritics and Planetary Science, 2006
Spin of planetary probes in atmospheric flight
JBIS - Journal of the British Interplanetary Society, 2006
The sand seas of titan: Cassini RADAR observations of longitudinal dunes
Science, 2006
Sediment transport by liquid surficial flow: Application to Titan
Icarus, 2006
Titan Radar Mapper observations from Cassini's T3 fly-by
Nature, 2006
Spinning flight: Dynamics of frisbees, boomerangs, samaras, and skipping stones
Spinning Flight: Dynamics of Frisbees, Boomerangs, Samaras, and Skipping Stones, 2006
The future of ai in space
IEEE Intelligent Systems, 2006
The potential for prebiotic chemistry in the possible cryovolcanic dome Ganesa Macula on Titan
International Journal of Astrobiology, 2006
Thermal interactions of the Huygens probe with the Titan environment: Constraint on near-surface wind
Icarus, 2006
What Titan is really like: In-situ measurements of the Titan environment by the Huygens probe
IEEE Aerospace Conference Proceedings, 2006
Non-equilibrium Thermodynamics and the Production of Entropy
2005
Convective plumes and the scarcity of Titan's clouds
Geophysical Research Letters, 2005
Flight and attitude dynamics measurements of an instrumented Frisbee
Measurement Science and Technology, 2005
Determination of physical properties of a planetary surface by measuring the deceleration of a probe upon impact: Application to Titan
Planetary and Space Science, 2005
A soft solid surface on Titan as revealed by the Huygens Surface Science Package
Nature, 2005
Miniature testbeds for planetary exploration vehicles: Tumbleweed and frisbee
IEEE Aerospace Conference Proceedings, 2005
Mapping the structure and depth of lava tubes using ground penetrating radar
Geophysical Research Letters, 2005
Cassini radar views the surface of Titan
Science, 2005
A post-huygens titan surface science mission design
IEEE Aerospace Conference Proceedings, 2005
Post-Cassini exploration of Titan: Science goals, instrumentation and mission concepts
Advances in Space Research, 2005
Radar: The Cassini Titan RADAR mapper
Space Science Reviews, 2005
Numerical calculations of the longevity of impact oases on Titan
Icarus, 2005
Sea-surface wave growth under extraterrestrial atmospheres: Preliminary wind tunnel experiments with application to Mars and Titan
Icarus, 2005
Titan's surface before Cassini
Planetary and Space Science, 2005
Physical properties as indicators of liquid compositions: Derivation of the composition for Titan's surface liquids from the Huygens SSP measurements
Monthly Notices of the Royal Astronomical Society, 2005
Planetary science: A 5-micron-bright spot on Titan: Evidence for surface diversity
Science, 2005
"Comet-tail" ejecta streaks: A predicted cratering landform unique to Titan
Meteoritics and Planetary Science, 2004
A miniature parachute-probe dynamics test-bed
European Space Agency, (Special Publication) ESA SP, 2004
Atmospheres as engines: Heat, work and entropy
Journal De Physique. IV : JP, 2004
Flying saucers
New Scientist, 2004
Sonic anemometry of planetary atmospheres
European Space Agency, (Special Publication) ESA SP, 2004
Splashdown and post-impact dynamics of the huygens probe: Model studies
European Space Agency, (Special Publication) ESA SP, 2004
Planetary probe entry and descent instrumentation - A review
European Space Agency, (Special Publication) ESA SP, 2004
Observing Titan with amateur equipment
European Space Agency, (Special Publication) ESA SP, 2004
The Yarkovsky effect as a heat engine
Icarus, 2004
Directed aerial robot explorers for planetary exploration
Advances in Space Research, 2004
Seasonal change in Titan's haze 1992-2002 from Hubble Space Telescope observations
Geophysical Research Letters, 2004
The temperature of Europa's subsurface water ocean
Icarus, 2004
Earth's entropy [3] (multiple letters)
Science, 2004
Thermal imaging of a desert dust devil
Journal of Meteorology, 2004
Titan's surface and rotation: New results from Voyager 1 images
Icarus, 2004
Interior structure models and tidal Love numbers of Titan
Journal of Geophysical Research E: Planets, 2003
Demonstration of comet sample collection by penetrator
European Space Agency, (Special Publication) ESA SP, 2003
A model of Titan's haze of fractal aerosols constrained by multiple observations
Planetary and Space Science, 2003
Backyard spectroscopy and photometry of Titan, Uranus and Neptune
Planetary and Space Science, 2003
Cassini RADAR: Prospects for Titan surface investigations using the microwave radiometer
Planetary and Space Science, 2003
Mars magnetometry from a tumbleweed rover
IEEE Aerospace Conference Proceedings, 2003
Computational mathematics: Full steam ahead-probably
Science, 2003
A simple expression for vertical convective fluxes in planetary atmosphere
Icarus, 2003
The second law of thermodynamics and the global climate system: A review of the maximum entropy production principle
Reviews of Geophysics, 2003
The seas of titan
Eos, 2003
Subsurface ambient thermoelectric power for moles and penetrators
IEEE Aerospace Conference Proceedings, 2003
The Glitter of Distant Seas
Science, 2003
Navigation of aerial platforms on Titan
Advances in the Astronautical Sciences, 2002
An artificial meteor on Titan?
Astronomy and Geophysics, 2002
Radiocarbon on Titan
Meteoritics and Planetary Science, 2002
Methane abundance on Titan, measured by the Space Telescope Imaging Spectrograph
Icarus, 2002
Maximum frictional dissipation and the information entropy of windspeeds
Journal of Non-Equilibrium Thermodynamics, 2002
Comparison of viking lander descent data and MOLA topography reveals kilometer-scale offset in Mars atmosphere profiles
Icarus, 2002
Titan's atmosphere - A review
Journal De Physique. IV : JP, 2002
Robotic astrobiology - The need for sub-surface penetration of Mars
European Space Agency, (Special Publication) ESA SP, 2002
Tidal winds on Titan: Measurement goals and mobility opportunities for future missions
European Space Agency, (Special Publication) ESA SP, 2002
Work output of planetary atmospheric engines: Dissipation in clouds and rain
Geophysical Research Letters, 2002
Titan's snowline
Icarus, 2002
Thermodynamics of geysers: Application to Titan
Icarus, 2002
Target effects during penetrator emplacement: Heating, triboelectric charging, and mechanical disruption
Planetary and Space Science, 2002
Titan airship explorer
IEEE Aerospace Conference Proceedings, 2002
Cassini Radio Detection and Ranging (RADAR): Earth and Venus observations
Journal of Geophysical Research: Space Physics, 2001
Correction to "Titan, Mars and Earth: Entropy production by latitudinal heat transport"
Geophysical Research Letters, 2001
Titan, Mars and Earth : Entropy production by latitudinal heat transport
2001
Geologic settings for aqueous organic synthesis on Titan revisited
Enantiomer, 2001
Mars attracts! A chain of microscopic magnets has revived hopes for Martian life, some say. But other experts will have none of it. Ralph Lorenz watched the two sides battle it out
New Scientist, 2001
Driven to extremes
New Scientist, 2001
Flight power scaling of airplanes, airships, and helicopters: Application to planetary exploration
Journal of Aircraft, 2001
Thermal and Evolved Gas Analyzer: Part of the Mars Volatile and Climate Surveyor integrated payload
Journal of Geophysical Research E: Planets, 2001
Physical properties of ammonian-rich ice: Application to Titan
Geophysical Research Letters, 2001
Post-Cassini exploration of Titan
European Space Agency, (Special Publication) ESA SP, 2001
Physical properties of the organic aerosols and clouds on Titan
Planetary and Space Science, 2001
Titan's smile and collar: HST observations of seasonal change 1994-2000
Geophysical Research Letters, 2001
Penetration tests on the DS-2 Mars microprobes: Penetration depth and impact accelerometry
Planetary and Space Science, 2000
Optimizing science return from titan aerial explorers
IEEE Aerospace Conference Proceedings, 2000
Post-cassini exploration of Titan: Science rationale and mission concepts
JBIS - Journal of the British Interplanetary Society, 2000
Microtektites on Mars: Volume and Texture of Distal Impact Ejecta Deposits
Icarus, 2000
Penetrator launch diagnostics from breech pressure measurements during operation of an air cannon
Measurement Science and Technology, 2000
Thermophysical properties of Alaskan loess: An analog material for the Martian polar layered terrain?
Geophysical Research Letters, 2000
Cassini Radar: Data analysis of the Earth flyby and simulation of Titan flybys' data
Proceedings of SPIE - The International Society for Optical Engineering, 2000
The weather on Titan
Science, 2000
An intact item of space debris with an Exposure age of about 10 years
JBIS - Journal of the British Interplanetary Society, 1999
Analytic Solutions for the Antigreenhouse Effect: Titan and the Early Earth
Icarus, 1999
On the volatile inventory of Titan from isotopic abundances in nitrogen and methane
Planetary and Space Science, 1999
Deep space 2: The Mars Microprobe Mission
Journal of Geophysical Research E: Planets, 1999
Analytic investigation of climate stability on Titan: sensitivity to volatile inventory.
Planetary and Space Science, 1999
Calorimetric radar absorptivity measurement using a microwave oven
Measurement Science and Technology, 1999
Seasonal Change on Titan Observed with the Hubble Space Telescope WFPC-2
Icarus, 1999
Solar Array Degradation by Dust Impacts During Cometary Encounters
1998
Microtektite dispersal from subcritical impact events on earth impact fluluence on spacecraft
JBIS - Journal of the British Interplanetary Society, 1998
Design considerations for Venus microprobes
Journal of Spacecraft and Rockets, 1998
Solar array degradation by dust impacts during cometary encounters
Journal of Spacecraft and Rockets, 1998
Preliminary Measurements of the Cryogenic Dielectric Properties of Water-Ammonia Ices: Implications for Radar Observations of Icy Satellites
Icarus, 1998
Some speculations on Titan's past, present and future
Planetary and Space Science, 1998
Speed of sound in outer planet atmospheres
Planetary and Space Science, 1998
Titan under a red giant sun: A new kind of "habitable" moon
Geophysical Research Letters, 1997
Titan's north-south asymmetry from HST and Voyager imaging: Comparison with models and ground-based photometry
Icarus, 1997
Did Comas Solà discover Titan's atmosphere?
Astronomy and Geophysics, 1997
Impacts and cratering on Titan: A pre-Cassini view
Planetary and Space Science, 1997
Titan's surface reviewed: The nature of bright and dark terrain
Planetary and Space Science, 1997
Latitudinal variation of aerosol sizes inferred from Titan's shadow
Icarus, 1997
Photochemically driven collapse of Titan's atmosphere
Science, 1997
Ablation and chemistry of meteoric materials in the atmosphere of Titan
Advances in Space Research, 1996
Martian surface wind speeds described by the Weibull distribution
1996
Martian surface wind speeds described by the Weibull distribution
Journal of Spacecraft and Rockets, 1996
Surface of Titan revealed by Cassini/Huygens
Proceedings of SPIE - The International Society for Optical Engineering, 1996
Sixty ways to tour Saturn
New Scientist, 1996
Erosion on Titan: Past and present
Icarus, 1996
Pillow lava on Titan: Expectations and constraints on cryovolcanic processes
Planetary and Space Science, 1996
Titan's surface, revealed by HST imaging
Icarus, 1996
Hiding Titan's ocean: Densification and hydrocarbon storage in an icy regolith
Planetary and Space Science, 1996
Prediction of aeolian features on planets: application to Titan paleoclimatology
Journal of Geophysical Research, 1995
Raindrops on Titan
Advances in Space Research, 1995
Tidal Dissipation on Titan
Icarus, 1995
Liquids and solids on the surface of Titan: results of a new photochemical model
Planetary and Space Science, 1994
Crater lakes on Titan: rings, horseshoes and bullseyes
Planetary and Space Science, 1994
Impact penetrometer for a landing spacecraft
Measurement Science and Technology, 1994
The surface of Titan in the context of ESA's Huygens Probe
ESA Journal, 1993
The life, death and afterlife of a raindrop on Titan
Planetary and Space Science, 1993
Wake-Induced Dust Cloud Formation Following Impact of Planetary Landers
Icarus, 1993
Aerodynamic attitude stabilization for a small, low-orbiting, manoeuvrable satellite
Acta Astronautica, 1989