A5017123209- Planetary Science and Exploration
- Spacecraft and Cryogenic Technologies
- Astro and Planetary Science
- Space Exploration and Technology
- Spacecraft Dynamics and Control
- Spacecraft Design and Technology
- Aerospace Engineering and Energy Systems
- Seismic Waves and Analysis
- Heat Transfer and Boiling Studies
- Rocket and propulsion systems research
- Heat Transfer and Optimization
- Seismology and Earthquake Studies
- Gas Dynamics and Kinetic Theory
- Geophysics and Sensor Technology
- Meteorological Phenomena and Simulations
- Fluid Dynamics and Thin Films
- Earthquake Detection and Analysis
- Space Science and Extraterrestrial Life
- Space Satellite Systems and Control
- Underwater Acoustics Research
- Geophysics and Gravity Measurements
- Atomic and Subatomic Physics Research
- Groundwater flow and contamination studies
- Aeolian processes and effects
- History and Developments in Astronomy
Jet Propulsion Laboratory
2012-2024
California Institute of Technology
2002-2021
National Aeronautics and Space Administration
2020
Sandia National Laboratories California
2017
Université Paris Cité
2016
Délégation Paris 7
2016
Washington University in St. Louis
1991-1998
Georgia Institute of Technology
1993-1995
Abstract The Scanning Habitable Environments with Raman and Luminescence for Organics Chemicals (SHERLOC) is a robotic arm-mounted instrument on NASA’s Perseverance rover. SHERLOC has two primary boresights. Spectroscopy boresight generates spatially resolved chemical maps using fluorescence spectroscopy coupled to microscopic images (10.1 μm/pixel). second Wide Angle Topographic Sensor Operations eNgineering (WATSON); copy of the Mars Science Laboratory (MSL) Hand Lens Imager (MAHLI) that...
Abstract Extreme temperature and pressure conditions on the surface of Venus present formidable technological challenges against performing ground‐based seismology. Efficient coupling between Venusian atmosphere solid planet theoretically allows study seismically generated acoustic waves using balloons in upper atmosphere, where are far more clement. However, earthquake detection from a balloon has never been demonstrated. We first an balloon‐borne microbarometer near Ridgecrest, CA July...
On April 19, 2021, NASA's Ingenuity Mars Helicopter successfully executed humanity's historic first flight on Mars. In the flights that followed, continued to explore boundaries of what was aerodynamically, energetically, and operationally possible, took increasingly daring missions in process. Over time, Ingenuity's mission has evolved from a “Technology Demonstration” rotorcraft fly an “Operations scientific aerial exploration scenarios activities...
There are many different atomic frequency standard technologies but only few meet the demanding performance, reliability, size, mass, and power constraints required for space operation. The Jet Propulsion Laboratory is developing a linear ion-trap-based mercury ion clock, referred to as DSAC (Deep-Space Atomic Clock) under NASA's Technology Demonstration Mission program. This clock expected provide new capability with broad application space-based navigation science. A one-year flight...
Abstract We conducted an experiment in Pahrump, Nevada, June 2017, where artificial seismic signals were created using a hammer, and the possibility of detecting them from their acoustic signature was examined. In this work, we analyze pressure recorded by highly sensitive barometers deployed on ground tethers suspended balloons. Our signal processing results show that wind noise experienced barometer free‐flying balloon is lower compared to one moored balloon. This has never been...
Seismology on Venus has long eluded planetary scientists due to extreme temperature and pressure conditions its surface, which most electronics cannot withstand for mission durations required ground-based seismic studies. We show that infrasonic (low-frequency) fluctuations, generated as a result of ground motion, produced by an artificial source known hammer, recorded using sensitive microbarometers deployed tethered balloon, are able replicate the frequency content motion. also weak,...
Abstract The mechanical coupling between solid planets and their atmospheres enables seismically induced acoustic waves to propagate in the atmosphere. We numerically simulate this coupled system for two application cases: active seismic experiments (ASEs) passive experiments. A recent ASE (Krishnamoorthy et al., 2018, https://doi.org/10.1002/2018GL077481 ) observed infrasonic signals produced by a hammer. To measure sensitivity of observations parameters, we attempt reproduce results from...
Abstract Standard meteorological balloons can deliver small scientific payloads to the stratosphere for a few tens of minutes, but achieving multihour level flight in this region is more difficult. We have developed solar-powered hot-air balloon named heliotrope that maintain nearly constant altitude upper troposphere–lower as long sun above horizon. It accommodate ranging from hundreds grams several kilograms. The achieve float altitudes exceeding 24 km and fly days Arctic summer, although...
High-altitude monitoring of low-frequency acoustic waves (infrasound) on Earth has regained prominence in recent years, primarily driven by improvements light-weight sensor technology and advances scientific ballooning techniques. Balloon-borne infrasound is also being proposed as a remote sensing technique for planetary exploration. Contrary to ground-based monitoring, the noise background stratosphere measured balloon remains uncharacterized efficacy wind mitigation filters not been...
The Mars Science Laboratory (MSL) mission to land a large rover on is being planned for launch in 2009. This paper will describe the basic architecture of thermal control system, challenges and methods used overcome them by use an innovative maximize heritage from past projects while meeting requirements design.
We present the Sample Recovery Helicopter (SRH) element that serves as primary backup for tube retrieval part of Mars Return (MSR) Campaign. SRH was officially incorporated into MSR in July 2022. Concept operations, aerial and ground mobility, manipulation, avionics, thermal telecom will be described context SRH's Mission Review held June The summarized Operations (ConOps) is follows: 1. would ride along with Retrieval Lander to deploy onto surface. 2. perform mapping flights aid...
Natural convection in a spherical geometry is considered for prediction of the buoyancy single- and double-walled balloons cryogenic environment such as Titan’s atmosphere. The steady-state flow characteristics obtained by solving Reynolds-averaged Navier–Stokes equations with standard turbulence model are used to determine net function heat input. Thermal radiation effects shown to have minor impact on buoyancy, would be expected at conditions. predicted temperature fields compare...
Venus is essential to our understanding of the evolution and habitability Earth-size planets throughout galaxy. The selection VERITAS, EnVision, DAVINCI missions by NASA ESA in June 2021 an important step advancing science. However, addressing many most challenging questions will require situ platforms that can operate environment for extended periods order capture full complexity sister planet. Aerobots are aerial vehicles exploit buoyancy achieve long-duration operation cloud layer where...
Capillary temperature control during capillary electrophoresis (CE) separations is key for achieving accurate and reproducible results with a broad array of potential methods. However, the difficulty enabling typical fluid loops on portable instruments has meant that active in situ CE systems frequently been overlooked. This work describes construction test solid-state device suitable inclusion instruments, including those designed space missions. Two articles were built, thermal mass model...
This paper details a significant milestone towards maturing buoyant aerial robotic platform, or aerobot, for flight in the Venus clouds. We describe two flights of our subscale altitude-controlled fabricated from materials necessary to survive conditions. During these over Nevada Black Rock desert, prototype flew at identical atmospheric densities as 54 55 km cloud layer altitudes on Venus. further first-principle aerobot dynamics model which we validate against data and subsequently employ...