A5045771914- Planetary Science and Exploration
- Space Exploration and Technology
- Astro and Planetary Science
- Space Science and Extraterrestrial Life
- Spacecraft and Cryogenic Technologies
- Scientific Research and Discoveries
- Geology and Paleoclimatology Research
- Spacecraft Design and Technology
- Spacecraft Dynamics and Control
- Spaceflight effects on biology
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Gas Dynamics and Kinetic Theory
- Hydrocarbon exploration and reservoir analysis
- Icing and De-icing Technologies
- Rocket and propulsion systems research
- Calibration and Measurement Techniques
- Geological and Geochemical Analysis
- Aerospace Engineering and Energy Systems
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Robotic Path Planning Algorithms
- Radiation Effects in Electronics
- Climate change and permafrost
- Micro and Nano Robotics
Jet Propulsion Laboratory
2019-2024
University of Arizona
2017-2019
Planetary Science Institute
2017-2019
Earth and Space Research
2017
University of Washington
2011-2017
Abstract Excess ice with a minimum age of tens millions years is widespread in Arcadia Planitia on Mars, and similar deposit has been found Utopia Planitia. The conditions that led to the formation preservation these midlatitude sheets hold clues past climate subsurface structure Mars. We simulate thermal stability retreat buried excess over 21 Myr Martian orbital solutions find can be orders magnitude older than obliquity cycles are typically thought drive deposition sublimation. Retreat...
Abstract Mars' iconic polar spiral troughs are 400–1,000‐m‐deep depressions in the north layered deposits. As deposits accumulate, migrate approximately poleward, anti‐parallel to local wind patterns. Insolation is suspected drive ice retreat through sublimation. Sublimation at trough wall produces a growing sublimation lag that modulates further retreat; however, winds move material off retreating slope faces, thinning lag. Discontinuities stratigraphy seen by radar highlight Trough...
Abstract The era of helicopter-based surveys on Mars has already begun, creating opportunities for future aerial science investigations with a range instruments. We argue that magnetometer-based studies can make use technology to answer some the key questions regarding early evolution. As such, we discuss mission concepts helicopter equipped magnetometer Mars, measurements it would provide, and survey designs could be implemented. For scenarios, build magnetization models test how well...
Deciphering paleoclimate on Mars has been a driving goal of Martian science for decades. Most research addressed this issue by studying Mars' large polar layered deposits (PLDs) as proxy, but the certainty to which we know link between climate and orbit is debated. Here, instead consider record other, smaller ice located within craters separated from PLDs using images NASA's High Resolution Imaging Science Experiment camera signal processing techniques. We show that in Burroughs Crater...
With Ingenuity's successful technology demonstration flights, NASA has unlocked a new dimension of mobility, exploration, and science for Mars. Just as Sojourner lead to Perseverance, so shall Ingenuity larger more capable exploration platforms. This paper will present the latest future Mars rotorcraft concept in its early formulation stages, called Science Helicopter (MSH). The focus MSH is deliver scientific payloads 2-5kg range newly frontiers Such would need be significantly...
Abstract Specific heat capacity Cp(T) is an intrinsic regolith property controlling planetary surface temperatures along with the albedo, density, and thermal conductivity. depends on material composition temperature. Generally, modelers assume a fixed specific value, or standard temperature dependence derived from lunar basalts, mainly because of limited composition‐specific data at low relevant to surfaces. In addition, only appears vary by small factor across various materials, in...
Abstract Mars Polar Science is a subfield of science that encompasses all studies the cryosphere and its interaction with Martian environment. Every 4 yr, community scientists dedicated to this meets discuss new findings debate open issues in International Conference on Exploration (ICMPSE). This paper summarizes proceedings seventh ICMPSE progress made since sixth edition. We highlight most important advances present salient questions field today, as discussed agreed upon by participants...
Abstract The present climate of Mars is punctuated by recurring dust storm events, where lifted from the surface and transported atmosphere. Dust addition or removal can brighten darken surface, as well affect thermal insulating properties because its low conductivity. Of particular interest recurrence global storms (GDSs) whether their frequency controlled replenishment depletion finite reservoirs between events. Global models predict changes in coverage before after storms, but output...
Abstract Ice sheets, such as the polar layered deposits (PLDs) of Mars, are great interest records past climate. Smaller outlier ice near north and south PLDs likely more sensitive to climate changes thus may hold information about recent history. However, southern have largely remained unmapped unanalyzed. Here, we identify 31 near, but separated from, Mars's PLDs, all which located within impact craters >15 km in diameter. On basis morphology, radar analysis, physical similarity...
Abstract Using derived temperatures from thermal‐infrared instruments aboard orbiting spacecraft, we constrain the thermophysical properties, in upper few meters, of north polar residual cap Mars. In line with previous authors test a homogeneous thermal model (i.e., depth‐independent properties), simulating water ice varying porosity against observed temperatures. We find that high inertia (>1,000 J m −2 K −1 s 1/2 or <40% porosity) provides best fit for most cap. Additionally, data...
Abstract With the aim of better understanding past depositional environment north polar region Mars, we infer local ice accumulation and retreat rates in area between 86° 87°N 16°–20°E. We follow a novel approach utilizing Bayesian framework with observations bounding surfaces associated migration two spiral troughs. Over time, troughs have migrated toward pole due to accumulation, sublimation, wind transport. relate record trough using phenomenological model explore climate parameters that...
Mid-Air Helicopter Delivery (MAHD) is a new Entry, Descent and Landing (EDL) architecture to enable in situ mobility for Mars science at lower cost than previous missions. It uses jetpack slow down Science (MSH) after separation from the backshell, reach aerodynamic conditions suitable helicopter take-off mid air. For given aeroshell dimensions, only MAHD's lander-free approach leaves enough room accommodate largest rotor option MSH. This drastically improves flight performance, notably...
Mid-Air Helicopter Delivery (MAHD) is a new Entry, Descent and Landing (EDL) architecture to enable in situ mobility for Mars science at lower cost than previous missions. It uses jetpack slow down Science (MSH) after separation from the backshell, reach aerodynamic conditions suitable helicopter take-off mid air. For given aeroshell dimensions, only MAHD's lander-free approach leaves enough room accommodate largest rotor option MSH. This drastically improves flight performance, notably...
Using the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), we map temporal variability of water ice absorption bands over near-polar mound in Louth crater, Mars. The band depth at 1.5 microns can be used as a proxy grain size and so sudden reductions time any switches from ablation to condensation. A short period deposition on outer edge during late spring coincides with disappearance seasonal frost surrounding regolith suggesting that this is locally sourced. unit differs its...