cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.j3p8cr
title: An emergent constraint on climate sensitivity by seasonal cycle of extratropical low clouds

description: A large spread in climate model estimates of equilibrium climate sensitivity (ECS), i.e., the global mean surface temperature increase in response to the radiative forcing of a doubling of CO2, can be largely ascribed to model uncertainty in representing low cloud shortwave (SW) radiative feedback. In this study, we show that the estimated ECS in a model is highly related to its depiction of seasonal variations of low cloud fraction (LCF) over the extra-tropics in historical simulations. Marked reduction of extratropical LCF from winter to summer is found in the models with ECS &gt; 4.5 K, but is largely absent in the models with ECS &lt; 3.3 K. The rapid reduction of extratropical LCF with increasing local surface temperature as manifested in its seasonal cycle in the high ECS models is in accord with significantly reduced extratropical LCF under a warming climate, and tends to be in better agreement with satellite observations of both LCF and the top-of-the-atmosphere SW cloud radiation effect. Given the emergent relationship between the seasonal variations of extratropical LCF and ECS derived in this study, the low ECS values in several models are likely underestimated. Further analyses using a cloud regime-based approach suggest that the distinct low cloud feedbacks over the extra-tropics between the high and low ECS models can be ascribed to their different prevailing cloud regimes in governing the low cloud variability. The strong positive low cloud feedback over the extra-tropics in the high ECS models involved with both seasonal cycle and climate trend is resulted from a strong coupling between low clouds and the mid- and high-top clouds through tropospheric vertical motion associated with the storm track variability. In contrast, a low-top cloud regime that largely follows the lower-tropospheric stability tends to dominate low cloud variability in the low ECS models. Considering the uncertainty in depicting the extratropical low cloud variability using satellite retrievals, we call for further investigations to characterize the prevailing cloud regimes and their roles in regulating low cloud variability over the extra-tropics.
DOI: 10.48577/jpl.dw9qy2
title: Integrated Interior Science with Europa Clipper

description: The Galileo mission to Jupiter revealed that Europa is an ocean world. The Galileo magnetometer experiment in particular provided strong evidence for a salty subsurface ocean beneath the ice shell, likely in contact with the rocky core. Within the ice shell and ocean, a number of tectonic and geodynamic processes may operate today or have operated at some point in the past, including solid ice convection, diapirism, subsumption, and interstitial lake formation. The science objectives of the Europa Clipper mission include the characterization of Europa’s interior; confirmation of the presence of a subsurface ocean; identification of constraints on the depth to this ocean, and on its salinity and thickness; and determination of processes of material exchange between the surface, ice shell, and ocean. Three broad categories of investigation are planned to interrogate different aspects of the subsurface structure and properties of the ice shell and ocean: magnetic induction, subsurface radar sounding, and tidal deformation. These investigations are supplemented by several auxiliary measurements. Alone, each of these investigations will reveal unique information. Together, the synergy between these investigations will expose the secrets of the Europan interior in unprecedented detail, an essential step in evaluating the habitability of this ocean world.
DOI: 10.48577/jpl.kcxpz8
title: Life Detection on Icy Moons Using Flow Cytometry and Exogenous Fluorescent Stains

description: Flow cytometry is a potential technology for in situ life detection on icy moons (such as Enceladus and Europa) and on the polar ice caps of Mars. Here we develop a method for using flow cytometry to positively identify four classes of biomarkers using exogenous fluorescent stains: nucleic acids, proteins, carbohydrates, and lipids. We demonstrate the effectiveness of exogenous stains with six known organisms and known abiotic material. We show that the cytometer is easily able to distinguish between the known organisms and the known abiotic material using the exogenous stains. To simulate a life detection experiment on an icy world lander, we use six natural samples with unknown biotic and abiotic content. We show that flow cytometry can identify all four biomarkers using the exogenous stains, and can separate the biotic material from the known abiotic material on scatter plots. Exogenous staining techniques would likely be used in conjunction with intrinsic fluorescence, clustering, and sorting for a more complete and capable life detection instrument on an icy moon lander.
DOI: 10.48577/jpl.nvktnq
title: Optical design and performance of the Lunar Trailblazer High-resolution Volatiles and Minerals Moon Mapper (HVM3)

description: The High-resolution Volatiles and Minerals Moon Mapper (HVM3) is a pushbroom shortwave infrared (SWIR) imaging spectrometer developed at NASA’s Jet Propulsion Laboratory (JPL), California Institute of Technology, for the Lunar Trailblazer mission. The mission, a part of NASA’s Small Innovative Missions for Planetary Exploration (SIMPLEx) program, pairs HVM3 with University of Oxford’s Lunar Thermal Mapper (LTM) to determine the form, abundance, and distribution of water on the Moon, while providing a potential reconnaissance opportunity for future landed missions. The HVM3 optical design utilizes heritage from NASA’s Moon Mineralogy Mapper (M3), and maintains a compact form while extending to longer wavelengths. Operating at F/3.4 with a spatial resolution of 70 meters per pixel and a spectral resolution of 10 nm over the 0.6 to 3.6 microns spectral range, HVM3 is optimized for the detection of volatiles to map OH, bound H2O, and water ice at the Moon, including the Moon’s permanently shadowed regions (PSRs). We discuss the optical specifications, optical design, alignment, and initial measured laboratory performance of the HVM3 instrument.
DOI: 10.48577/jpl.eagxkf
title: Moon Diver: Exploring a Pit’s Exposed Strata to Understand Lunar Volcanism

description: The discovery of natural pits on the Moon, potential entrances to lava tubes, expose a deep cross-section of the lunar maria, enabling the direct investigation of the formation and evolution of the Moon’s secondary crust. With this goal, the Moon Diver mission concept seeks to explore the Mare Tranquillitatis pit with its 70 m of exposed wall of regolith and bedrock. The concept is enabled by two innovative capabilities: pinpoint landing near the pit and robotic access to its near-vertical wall with an instrument package to examine the chemistry, mineralogy, and morphology of these bedrock layers. Pinpoint landing uses closed-loop guidance with terrain-relative navigation (TRN), which was advanced by Perseverance landing on Mars, to deliver the lander within a 100 m ellipse. The Axel robotic explorer, which remains tethered to the lander, would egress onto the lunar surface and traverse the relatively flat terrain to the pit’s funnel entrance. The lander, which is the data link to Earth, also serves as an anchor and provides power and communication to the rover through its tether. The rover is a novel two-wheeled platform with a trailing boom and a spool that pays out the tether as the rover traverses toward the pit. The 300 m long tether is well margined for the rover to scale the pit wall. The rover carries a surface preparation tool and three additional instrument types: (a) three high-resolution cameras for acquiring context images of the near and far walls with the near-wall pair in a stereoscopic configuration, (b) an alpha-particle-X-ray spectrometer (APXS) for elemental composition, and (c) a multi-spectral microscopic imager (MMI) that uses controlled lighting for minerology. The surface-preparation tool removes dust and patina from rock wall by grinding a small area. This tool, the MMI and the APXS would be deployed from an instrument bay inside the wheel wells. The rover would independently point each instrument at the same target on the wall with millimeter repeatability. Landing shortly after sunrise, the surface mission timeline is just shy of a lunar day (14 Earth days). Beyond the primary mission, the rover would be capable of descending across the overhang and peer into the void that may open to a large cave or lava tube. Lunar pits provide an exciting new target for exploration using innovative robotic capabilities that have been tested with integrated science instruments at multiple terrestrial analog sites including a basaltic pit in Arizona.
DOI: 10.48577/jpl.c4cqs8
title: The Psyche Mission (conference paper)

description: NASA's Psyche Mission is designed to orbit and study the asteroid (16) Psyche. Psyche, discovered in 1852 by Annibale de Gasparis at the Astronomical Observatory of Capodimonte in Naples, is the largest M-type asteroid in the Solar System and a possible exposed core of a protoplanetary body. The mission payload includes a gamma ray and neutron spectrometer designed to determine Psyche's elemental composition, a pair of imagers which will perform topographic and spectral surface analysis, and a magnetometer (built by the Denmark Technical University) which will investigate Psyche's internal structure and differentiation. All of the payloads will contribute to determine Psyche's origin and place in the formation of the solar system. The Discovery-class mission uses solar powered low thrust electric propulsion and carries an optical communications technology demonstration. Complex, innovative, and low cost planning have been required to produce an effective mission plan amidst COVID-19, a new spacecraft design and build partnership between NASA and Maxar Space, and significant anomalies uncovered during spacecraft manufacture and test. The mission plans accommodate frequent thrusting with limited communications for most of the cruise phase, very early mission pressure from its technology demonstration, an intensive Mars gravity assist, high uncertainties in (16) Psyche's characteristics, and four successively lower orbits at the asteroid, the last being below one body radius above the surface.
DOI: 10.48577/jpl.drmxcp
title: Transfers between Jupiter-Ganymede and Jupiter-Europa Resonant Tori In a Concentric Circular Restricted 4-Body Model

description: The phenomenon of mean-motion resonance overlapping, which generates heteroclinic connections between unstable resonant orbits, is known to be crucial for the generation of large-scale chaos and global instability in celestial systems. This instability in turn can be profitably leveraged for the purposes of low-energy space mission trajectory design. In most prior work leveraging such phenomena, though, connections were found between orbits resonant with the same moon; however, both Jupiter and Saturn have multiple moons, each having their own set of mean motion resonances. This study will present some results from a search for trajectories between orbits resonant with different Jovian moons, namely Ganymede and Europa. For this, the appropriate model to use is a concentric circular restricted 4-body model, where most unstable mean-motion resonant orbits correspond to 2D tori in a 5D extended phase space. We use GPU-assisted tools inspired by collision detection algorithms from computer graphics to rapidly find near-intersections of Jupiter-Ganymede and Jupiter-Europa resonant orbit manifolds, which correspond to potential transfers. We find the Jupiter-Ganymede 4:3 resonance to be the most promising candidate for trajectories to the key
DOI: 10.48577/jpl.dndzub
title: A Traveling Hub of Information: An organizational history of the Library at NASA Jet Propulsion Laboratory

description: The Library at NASA’s Jet Propulsion Laboratory has undergone many changes to staffing, functions, services, and physical space in its seven decades of continuous operation, but none more curious and interesting than its assignments to various reporting organizations over time. This paper offers a chronological examination of the history, changes, and (possible) reasoning behind is organizational journey. According to an internal reorganization timeline, historic organization charts, and other documents, the Library has occupied organizational space under Lab Personnel, Human Resources, Documentation and Materiel, Logistics, and currently Engineering and Science. The JPL Library is not unique in this situation; to be sure, specialized libraries are continually moving around organization charts, shifting between more specific and more general lines of reporting, and ever asking “Does the library serve the entire institution, or a limited population of users?” The author will offer an analysis of the benefits and challenges of each reorganization, as well as how each organizational home reflected and influenced the Library’s role at the Lab.
DOI: 10.48577/jpl.5h9yoj
title: From Information to Knowledge and Back Again: How NASA Libraries and Knowledge Management Work Together for the Advancement of Space Science

description: This paper outlines the history of and continuing association between NASA libraries and knowledge offices, with a special focus on this relationship at NASA’s Jet Propulsion Laboratory, and will be informed by interactions within other space agencies and private industry. Libraries have been operating in the knowledge management (KM) space since the concept of KM was defined and codified. At NASA’s Jet Propulsion Laboratory, the JPL Library led many early KM initiatives and continues to work closely with the JPL Knowledge Office on strategy and applications of benefit to the Lab. These efforts include creating and supporting best practices around Information Management and Knowledge Management, knowledge capture and transfer, maintaining the efficient flow from data to information to knowledge, defining the transmission of knowledge back to information, and developing the structure and function of organizational information. Unlike the European Space Agency (ESA) whose libraries wholly transformed into Knowledge Centers, the NASA Center Libraries and Knowledge Offices remain as separate entities with distinct reporting structures, allowing subject matter experts to collaborate with others within and outside their organizations. While it is a challenge structurally that the NASA Agency and Center Knowledge Management offices report to the Office of the Chief Engineer (OCE) and the Libraries report to The Office of Communications (OCOMM), the NASA libraries and Knowledge offices continue to work in tandem to advance knowledge management thinking, solutions, and research.
DOI: 10.48577/jpl.z2faas
title: Setting the Record Straight: The Galileo Probe Mission Was a Success!

description: Misperceptions regarding the operational success and science accomplishments of the Galileo Jupiter atmospheric entry probe have acquired an inertia that threatens the perceived value, risk, and consideration of future giant planet entry probe missions. These misperceptions largely arise from the entry of the Galileo probe into a 5-micron hotspot, an uncharacteristically dry and cloud-free location near Jupiter’s equator. While local hotspot conditions prevented determination of weather-dependent global properties such as the abundance of water, the probe's measurements of parameters which are not weather dependent including noble gas abundances and isotope ratios have fundamentally altered our understanding of Jupiter's formation, evolution, and internal structure. In addition to its scientific success, the operational success of the Galileo probe represented a resounding technological achievement. The Galileo probe arrived at Jupiter at the location of a particularly sunny afternoon. and it is understood that in this cloud-free region the oxygen abundance as determined from the measurement of water is not representative of the planet as a whole. Furthermore, recent results from the Juno mission have shown that the mechanisms by which large-scale and local weather conditions can alter the abundance of condensable species are not well understood. This limitation does not, however, detract from abundance measurements of species not significantly influenced by local weather conditions. For example, the Galileo probe's determination that the He/H2 ratio is significantly smaller than inferred from remote sensing observations and lower than the solar ratio indicate that helium rainout is occurring on Jupiter. The helium rainout provides an additional heat source for the interior thereby affecting the refinement of Jupiter interior models. It is inevitable that future entry probe mission concepts will be compared to the highly successful Galileo probe. The science value and overall success or failure of an atmospheric entry probe must be evaluated based on the unique and valuable science achievable from single point in-situ measurements, and should not be judged based on expectations for global in-situ science results that would require a large number of entry probes distributed around the planet. In this paper we highlight Galileo probe lessons learned relevant to the design, concept of operation, instrumentation, technologies, and scientific objectives of future giant planet entry probe missions.
DOI: 10.15151/esrf-es-1331065430
title: High throughput characterization

description: High throughput characterization of ex-situ samples
DOI: 10.48577/jpl.tzvky7
title: Runtime Verification as Documentation

description: In runtime verification, a monitor is used to return a Boolean verdict on the behavior of a system. We present several examples of the use of monitors to instead document system behavior. In doing so, we demonstrate how runtime verification can be combined with techniques from data science to provide novel forms of program analysis.
DOI: 10.48577/jpl.xhdulz
title: Efficiency Estimation and Optimization of Multistage Compound Planetary Gearboxes and Application to the Design of the Active Skin Propulsion of EELS

description: This paper outlines a novel versatile geometric method for the estimation of the efficiency of multistage compound planetary gearboxes. The approach is based on a virtual pitch point modeling that allows for accurate representation of the gear interaction with forces applied at the pitch point. When this modeling is applied to all gears in a multistage compound planetary gearbox, the gearbox efficiency may be estimated directly from the free body diagram of the compound planets in a simple and easy to implement fashion. The gear design parameters that determine the gearing efficiency are identified and a consistent strategy for maximizing the efficiency of such gearboxes is outlined. Finally, the introduced methods are applied to the design of a three-stage compound planetary gearbox used in a novel snake-like robot.
DOI: 10.48577/jpl.gpwx0j
title: Extreme Environment Electronics for Venus

description: No abstract available.
DOI: 10.57967/hf/1103
title: solubility
DOI: 10.48577/jpl.egertv
title: A Waveguide Based Terahertz Variable Attenuator

description: No abstract available.
DOI: 10.48577/jpl.jgu2gp
title: NISAR APPLICATIONS WORKSHOPS: SUBSIDENCE, LANDSLIDES, CRITICAL INFRASTRUCTURE

description: No abstract available.
DOI: 10.48577/jpl.vrrzjq
title: HOW TO GET TRAINED TO USE SAR DATA FOR NISAR: TRAINING PROGRAMS AND DATA ANALYSIS SOFTWARE

description: No abstract available.
DOI: 10.48577/jpl.tzve9r
title: ASAR Data Delivery and Hosting Summary

description: No abstract available.
DOI: 10.48577/jpl.a8lgne
title: Communications for the Artemis Missions

description: No abstract available.
DOI: 10.48577/jpl.93c9xn
title: A Lagrangian Perspective on the evolution of Pockets of Open Cells and the Surrounding Environment

description: No abstract available.
DOI: 10.48577/jpl.lkzicy
title: NASA Moon Trek’s New Visualization Analysis Tools

description: No abstract available.
DOI: 10.48577/jpl.xfafq3
title: Research and Technology Development at JPL’s Electrochemical Technologies Group

description: No abstract available.
DOI: 10.48577/jpl.nrmnzs
title: Revisiting Edison and Tesla – AC and DC Power Considerations for Planetary Surface Power Transfer

description: No abstract available.
DOI: 10.48577/jpl.uosouz
title: NASA-ISRO SAR (NISAR) Mission Countdown to NISAR

description: No abstract available.
DOI: 10.48577/jpl.2uituh
title: NASA-ISRO SAR (NISAR) Mission Overview

description: No abstract available.
DOI: 10.48577/jpl.p1z3hm
title: Jetpack Concept for Mid-Air Helicopter Delivery at Mars

description: No abstract available.
DOI: 10.48577/jpl.ov9q7l
title: Introducing the International GNSS Service (IGS)

description: No abstract available.
DOI: 10.48577/jpl.dgamhn
title: Alloy and Specification Development of Bulk Metallic Glass Gears for Extraterrestrial Robotic Exploration

description: No abstract available.
DOI: 10.48577/jpl.4nk5ck
title: Mars Sample Return Mission: Challenges

description: No abstract available.
DOI: 10.48577/jpl.zerhp6
title: Libera Science Overview – Objectives, Methods and Applications

description: No abstract available.
DOI: 10.48577/jpl.1uq548
title: Libera's novel “split-shortwave” measurements and their application in climate research

description: No abstract available.
DOI: 10.48577/jpl.vqfqa4
title: The NISAR Mission’s Urgent Response Products

description: No abstract available.
DOI: 10.48577/jpl.8flsqn
title: Mars Rovers, Helicopters and Ventilators

description: No abstract available.
DOI: 10.48577/jpl.4ysxnf
title: Space Radiation Challenges for Future Deep Space Exploration: from Moon to Mars and beyond

description: No abstract available.
DOI: 10.48577/jpl.nhjokw
title: How GipsyX turns GNSS measurements into position in a frame

description: No abstract available.
DOI: 10.48577/jpl.rfajxx
title: SHARAD Data Investigation over the Jezero Crater: Clutter Analysis

description: No abstract available.
DOI: 10.48577/jpl.wen3tm
title: The Deep Space Network

description: No abstract available.
DOI: 10.48577/jpl.vikn9k
title: COVERAGE: A Reusable Platform Enabling Synergistic Use of Altimetry and other Inter-agency Satellite and in-situ Oceanographic Datain Support of Marine Applications

description: No abstract available.
DOI: 10.48577/jpl.yra6fn
title: Using the surface reference technique to derive cloud liquid water path

description: No abstract available.
DOI: 10.48577/jpl.c8ived
title: Lessons Learned from Five Years of running a Minority Research Program at JPL

description: No abstract available.
DOI: 10.48577/jpl.bniuvq
title: From Information to Knowledge and Back Again: How NASA Libraries and Knowledge Management Work Together for the Advancement of Space Science

description: No abstract available.
DOI: 10.48577/jpl.c78yia
title: Material Challenges for Jovian Moon Missions

description: No abstract available.
DOI: 10.48577/jpl.hkivbj
title: EFFICIENT TRADE SPACE EXPLORATION: MOTIVATION AND METHODS FOR INITIAL FEASIBILITY ASSESSMENTS

description: No abstract available.
DOI: 10.48577/jpl.kqv096
title: Measuring Earth Energy Imbalance From Space

description: No abstract available.
DOI: 10.48577/jpl.mvzwgx
title: On Measuring Earth’s Energy Imbalance From Space

description: No abstract available.
DOI: 10.48577/jpl.nslrgp
title: STMD/GCD Annual Program Review Slides for LuNaMaps project

description: No abstract available.
DOI: 10.48577/jpl.hyyeme
title: Space-Based Quantum Networking at JPL

description: No abstract available.
DOI: 10.48577/jpl.arn26f
title: Space-Based Quantum Networking at JPL

description: No abstract available.
DOI: 10.57967/hf/1104
title: secondary_structure_prediction
DOI: 10.57967/hf/1105
title: deeploc
DOI: 10.57967/hf/1106
title: nearest_neighbor_search
DOI: 10.57967/hf/1107
title: remote_homology