cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.3409375
title: Encuesta de percepción y uso de Wikipedia

description: Encuesta de percepción y uso de Wikipedia.
DOI: 10.6084/m9.figshare.5027894
title: Tabla descriptiva de clusters

description: Esta tabla recoge la caracterización de cada tipo identificado, tomando como referencia los valores centrales en cada factor y las diferencias significativas observadas en la conducta que realiza cada grupo
DOI: 10.6084/m9.figshare.24113364
title: Inter-event creep reveals seismic moment release modulated by strain energy sources during fluid injection

description: This is the shared data for the study entitled: "Inter-event creep reveals seismic moment release modulated by strain energy sources during fluid injection"By Zhou Fang, Wei Wu*This study has been submitted to the Journal of Geophysical Research: Solid Earth for possible publication as a research paper in Jan. 2024.For any further queries, please contact wu.wei@ntu.edu.sg
DOI: 10.6084/m9.figshare.24113364.v2
title: Inter-event creep reveals seismic moment release modulated by strain energy sources during fluid injection

description: This is the shared data for the study entitled: "Inter-event creep reveals seismic moment release modulated by strain energy sources during fluid injection"By Zhou Fang, Wei Wu*This study has been submitted to the Journal of Geophysical Research: Solid Earth for possible publication as a research paper in Jan. 2024.For any further queries, please contact wu.wei@ntu.edu.sg
DOI: 10.6084/m9.figshare.24113364.v1
title: Inter-slip creep reveals seismic moment release modulated by strain energy sources during fluid injection

description: This is the shared data for the study entitled: "Inter-slip creep reveals seismic moment release modulated by strain energy sources during fluid injection"By Zhou Fang, Wei Wu*This study has been submitted to the Journal of Geophysical Research: Solid Earth for possible publication as a research paper in Sep. 2023.For any further queries, please contact wu.wei@ntu.edu.sg
DOI: 10.6084/m9.figshare.25097522
title: SNP .xlsx

description: This study aimed to investigate the relationship between single nucleotide polymorphisms (SNPs) in TXKandKCNIP4 genes and growth traits in Ashidan yaks and to search for potential molecular marker loci that can influence Ashidan yak breeding. A cGPS liquid microarray was used to genotype 232 Ashidan yaks and to analyse correlations between two SNPloci in the TXK and KCNIP4 genes and yak body weight, body height, body length,chest circumference atindifferent periods. The TXKgene g.55,999,531C&gt;T locus and KCNIP4gene g.84,567,697C&gt;A locus were significantly associated with Ashidan yak growth traits.
DOI: 10.48577/jpl.1nnozt
title: Statistical Characteristics of Total Electron Content Intensifications on Global Ionospheric Maps

description: Global ionospheric Total Electron Content (TEC) maps exhibit TEC intensications and depletions of various sizes and shapes. Characterizing key features on TEC maps and understanding their dynamic coupling with external drivers can signicantly benet space weather forecasting. However, comprehensive analysis of ionospheric structuring over decades of TEC maps is currently lacking due to large data volume. We develop feature extrac- tion software based on image processing techniques to extract TEC intensication re- gions, i.e., contiguous regions with suciently elevated TEC values than surrounding ar- eas, from global TEC maps. Applying the software to the Jet Propulsion Laboratory Global Ionospheric Map data, we generate a TEC intensication dataset for years 2003 to 2022 and carry out a statistical study on the number and strength of TEC intensications. We nd that the majority of the TEC maps (about 86%) are characterized with 1 or 2 intensication(s), while the rest of the TEC maps have 3 or more intensications. Both the number and strength of TEC intensications exhibit semi-annual variation that peaks near equinoxes and dips near solstices, as well as an annual asymmetry with larger values around December solstice compared to June solstice. The number and strength of intensications increase with enhanced solar extreme-violet irradiance. The strength of intensications also increases with elevated geomagnetic activity, but the number of in- tensications does not. In addition, the number of intensications is not correlated with the strength of intensications.
DOI: 10.48577/jpl.oflag5
title: Reflectarrays and Metasurface Antennas at Millimeter and Terahertz Waves

description: In this paper we present an overview of different metasurface antenna technologies that are being developed in our laboratory at millimeter and terahertz waves for space applications. We will show that even though transmit- and reflect-arrays have made tremendous progress at millimeter-wave frequencies in recent years, it is challenging to use them at terahertz frequencies. Moreover, for space applications, metasurface antennas at these frequencies are sometimes preferable as they require less volume. We provide detailed scientific motivations for some of the metasurface antennas working in the Ku-band to W-band and beyond. We report all-metal metasurface antennas with high efficiency working in the Ka-band and beam-steering metasurface antennas working in W-band for radar and spectrometer applications.
DOI: 10.48577/jpl.2q46dx
title: Investigating a NASA Cyclomatic Complexity Policy on Maintenance Risk of a Critical System

description: Monte is a mission critical system used by NASA for navigation and design of deep space missions has been used in over 40 missions over the last 18 years. Its continuous, reliable operation is considered critical to the operation for over 18 ongoing missions. Recently Monte has been escalated to safety-critical software and subject to NASA Software Assurance and Software Safety Standard requirements. One of these requirements mandates a policy that the cyclomatic complexity (CC) for safety-critical components be under 16 or given a technically detailed explanation as to why it cannot or should not be lower. Conformance to this requirement would be costly and we had doubts about its benefit and efficacy in managing our maintenance risk (defect proneness and defect repair effort). The requirement was not substantiated either empirically or in principle, and guidance in the literature for use of CC as in indicator of maintenance risk is limited and often speculative or have contradictory empirical or non-definitive results. This led us to rigorously investigate the impact the CC policy would have on the practical management of maintenance risk for Monte. The effect of CC on maintenance risk for Monte is explored using a variety of statistical methods and machine learning with aim of provide objective empirical evidence to support our decision as to what extent we will conform to the NASA CC policy of maintaining a CC under 16. This paper presents the conclusions and insights gained from this investigation. Practical questions related to the policy are addressed such as: Does higher CC associate with higher defect proneness? More effort to repair defects? If so, is there a CC after which action should be taken to reduce defect proneness and repair effort? We conclude that the impacts of CC on maintenance risk are, with high confidence, consistent with the risk management expectations of the NASA policy. We can quantify the benefit and weight it against the cost to inform our decision in conforming to the policy. Furthermore, we gained insight into how CC affects maintenance risk and is a useful indicator for maintenance risk management.
DOI: 10.48577/jpl.6d9dzx
title: Optical design study of Surface Biology and Geology (SBG) Visible to Short Wavelength Infrared (VSWIR) Wide Swath Imaging Spectrometer

description: To address the 2017 Earth Science Decadal Survey an instrument utilizing two high-throughput F/1.8 Dyson imaging spectrometers is designed to provide 10 nm spectral sampling over the 380-2500 nm range with 180-kilometer swath width at 30-meter resolution while delivering high uniformity over the field of view and spectral range.
DOI: 10.48577/jpl.iqzpg6
title: Tunable Laser Spectrometers for Planetary Science

description: Distinguishing planetary formation and evolution pathways and understanding the origins of volatiles on planetary bodies requires determination of relative abundances and isotope ratios in the noble gases, and also of the isotope ratios in C, H, N, O and S at high precisions. Traditional planetary mass spectrometers uniquely provide excellent survey capability including the noble gas relative abundances and their isotope ratios, and for isotope ratios in H- and N-bearing compounds where isobaric interferences are not present. However, to distinguish planetary evolution models for the outer planets, stable isotope ratios in C and O require precisions of ~10‰ or better, readily achievable with a tunable laser spectrometer (TLS). As demonstrated on the Mars Curiosity rover, and as planned for a now-selected NASA Venus mission, tunable laser spectrometers play a unique role synergistic with the capabilities of planetary mass spectrometers. The TLS technique of recording infrared absorption spectra at ultrahigh resolution (resolving power λ/δλ ~10 million) provides unambiguous detection of a wide variety of gases such as H2O, H2O2, H2CO, HOCl, NO, NO2, HNO3, N2O, O3, CO, CO2, NH3, N2H4, PH3, H2S, SO2, OCS, HCl, HF, O2, HCN, and CH4, C2H2, C2H4, C2H6 at parts-per-billion levels. Through line-depth or line-area ratio comparisons of adjacent spectral lines, planetary TLS instruments can achieve isotope ratio measurements in C, H, N, O, and S molecules at precisions of ~1-2‰, including for the triple isotope components of O and S. Expected performance of TLS instruments for Venus, Saturn, Enceladus and Uranus will be described as constrained by actual measurements reported at Mars on the Curiosity rover.
DOI: 10.48577/jpl.8io4ew
title: A Large Aperture Parabolic Cylinder Deployable Mesh Reflector Antenna for Next-Generation Satellite Synthetic Aperture Radar

description: The tensegrity synthetic aperture radar (TenSAR) antenna architecture is a unique next-generation high-aspect ratio deployable reflector that promises to enable surface deformation and change (SDC) monitoring with low-Earth orbit (LEO) small satellites. We present the development of a novel C-band parabolic cylinder deployable mesh reflector with a 7m1.5 m rectangular aperture as the first TenSAR antenna demonstration. Unique stowage and deployment mechanisms are implemented for the first time for this mesh deployable reflector. A lightweight 132 element linear patch array feed based on honeycomb substrate is designed to test the performance of the reflector. The measured reflector antenna achieved a measured gain of 42.06 dB at 5.357 GHz, with half-power beamwidths of 0.52 and 2.35 in E- and H-plane.
DOI: 10.48577/jpl.8eqmyr
title: On-orbit Demonstration of 200-Gbps Laser Communication from the TBIRD CubeSat

description: No abstract available.
DOI: 10.48577/jpl.vyljpg
title: Planetary Orbital Mapping and Mosaicking (POMM) Integrated Open Source Software Environment

description: Several Open Source planetary orbital mapping and utility image processing software packages, including, VICAR, AFIDS, ISIS, GDAL, and GeoTIFF, have been integrated into a single software environment (POMM), where package programs can be run independently from a Linux command line, or combined in synergistic scripts that facilitate advanced trans-package applications. Several integrated scripts have been prepared to simplify some of the more difficult database building tasks such as 1) image co-registration (for stacking and time series analysis), 2) mosaicking (for regional analysis), and 3) map-projection of raw PDS images for selected Mars and Luna sensor systems. A user interface/GUI is provided for the three planetary applications, but the underlying scripts can also be modified by an advanced user and run at the command-line. POMM is Open Source software available in “docker” container and “Yum-Install” versions that support cross-platform installation on Windows, Apple, and Linux products using available desktop applications and/or virtual containers. However, installation on systems requiring emulation can be slow, and the installation process can be challenging.
DOI: 10.48577/jpl.tz4dxm
title: NASA’S LASER COMMUNICATIONS RELAY DEMONSTRATION (LCRD) EXPERIMENT PROGRAM: CHARACTERIZATION AND INITIAL OPERATIONS

description: The National Aeronautics and Space Administration’s (NASA) Laser Communications Relay Demonstration (LCRD) completed the first 18 months of its Experiment Program in December 2023. Geosynchronous-ground experiments to date have included demonstrations of optimetrics and of Delay/Disruption Tolerant Networking (DTN), and measurements of the effects of the atmosphere on lasercom performance and availability. Future operational scenarios have been emulated. This paper provides an overview and highlights of the first 18 months of LCRD experiments, and a preview of the upcoming experiments, including relaying data to and from the International Space Station. Keywords: Optical communications, lasercom, communications relay, DTN, adaptive optics, optimetrics
DOI: 10.48577/jpl.d2jjpn
title: Driving mechanisms of global surface ozone and its bias in the current chemical reanalysis using machine-learning approaches

description: No abstract available.
DOI: 10.48577/jpl.f6ucga
title: RELATIVE PHASING AND OBSERVATIONS OVERLAP: LOW-THRUST TRAJECTORY DESIGN OPTIONS FOR THE INCUS MISSION

description: The INvestigation of Convective Updrafts (INCUS) mission, a recently selected NASA Earth Venture Mission, aims to enhance the understanding of the formation of tropical convective storms. After ejection from the launch vehicle in low Earth orbit, the three smallsats constituting the constellation will use their low-thrust engine to reach their nominal orbit formation for science operations. This paper outlines two aspects of the constellation design. First, the in-track offsets between vehicles are determined such that the ground observations are separated by a specified time interval. Second, an algorithm is developed to design the transfers sequence to deliver the spacecraft to their nominal configuration along the science orbit. Analytical solutions and approximations for both aspects are derived, allowing rapid design of the constellation’s initialization sequence. The proposed algorithm, labeled the double spiral transfer algorithm, is successfully employed to generate transfers that yield the nominal configuration for the constellation in a higher-fidelity model that includes atmospheric drag and spherical harmonics for the Earth’s gravity field. Multiple initialization sequences are constructed to examine the trade-offs between time-of-flight and propellant usage.
DOI: 10.48577/jpl.bonobl
title: A Machine Learning Approach for Hydrogen Maser Frequency Stability Evaluation

description: No abstract available.
DOI: 10.48577/jpl.cff2ck
title: Software Error Classification and Dependency Assessment for NASA Missions

description: Software anomalies are typically captured in databases, classified, and traced until they are resolved. These databases then remain part of the history for the space missions to refer to as necessary. The classifications used for the software anomalies are not always orthogonal and it is not trivial for developers and software assurance personnel to make the mapping between the anomaly in question and its related classification. Perhaps more significantly, the classification scheme and the attributes included in the standardized forms do not clarify whether or not the error in question, and its corresponding fix, affect other areas of the system. Our research indicates that there are a few keywords that can help the users of these systems identify each of these factors with a reasonable level of confidence. Of course, since the information is captured using natural language, and is highly specialized, these keywords may be different from one mission to another and from one center to another. However, tools that enable the team to develop their own keywords or modify keywords that are seeded into the system could be beneficial in helping to correctly classify the anomalies and better understand the dependencies between them. The first step, is, of course, a clear, concise and descriptive classification scheme. In this paper, we explain our efforts towards developing a standardized classification scheme, based on our examination of these schemes across several NASA centers, as well as the literature, and we also define the concept for a module for user-assisted analysis based on keywords that we have extracted from studying a subset of the problem failure reports for the Mars Perseverance Rover mission.
DOI: 10.48577/jpl.u4amow
title: Machine Learning Applications for Reliability

description: Published literature reports a number of Artificial Neural Networks (ANN) applications to solve problems in the area of circuit design, modelling and fault identification. Motivated by these findings and building upon previous applications of device modelling through ANN, we identify in this article promising areas for reliability processes improvement using ANNs. Because the run faster than simulators, ANN models can provide an impact in the area of Worst-Case Analysis, where a large number of computationally intensive transient simulations may be required. Failure diagnosis is particularly promising in the area of flight circuits, both for ground testing and also for in-flight fault detection and circuit self-correction.
DOI: 10.48577/jpl.kcvt3d
title: Ground Station for Terabyte Infrared Delivery (TBIRD)

description: No abstract available.
DOI: 10.48577/jpl.wgxfuc
title: The GeoSTAR geostationary microwave sounder

description: No abstract available.
DOI: 10.48577/jpl.3lhpoj
title: Early Results from NASA’s Laser Communications Relay Demonstration (LCRD) Experiment Program

description: The National Aeronautics and Space Administration’s (NASA) Laser Communications Relay Demonstration (LCRD) mission began its two-year Experiment Program in June 2022. This experimental phase includes long-term measurement of the effects of the atmosphere (turbulence, weather) on the performance and availability of lasercom. Furthermore, various future operational scenarios including robotic and exploration missions and various network service configurations are being emulated. In addition to experiments and demonstrations proposed by the LCRD Investigator Team, NASA enables individuals and groups from government agencies, academia, and industry to propose experiments under the LCRD Guest Experimenters Program. This conference paper provides highlights of the early LCRD experiments and a preview of the future experiments, including relaying data to and from the Integrated LCRD Low-Earth Orbit (LEO) User Modem and Amplifier Terminal (ILLUMA-T) on the International Space Station. The LCRD geosynchronous payload includes two laser communications terminals interconnected via an onboard electronic switch, and can relay information between two optical ground stations located in California and Hawaii. LCRD is a joint project involving NASA Goddard Space Flight Center (GSFC), the NASA Jet Propulsion Laboratory (JPL), and Massachusetts Institute of Technology Lincoln Laboratory (MIT LL).
DOI: 10.48577/jpl.za3g0c
title: Using SDR to Enhance Ground Station Testing and Multiple Spacecraft Per Antenna Capability at the Morehead State University 21-m Ground System

description: No abstract available.
DOI: 10.5281/zenodo.10576995
title: Nitrogen-induced community shifts in plants and microbes modulate soil respiration responses to warming and rainfall changes
DOI: 10.5281/zenodo.10576996
title: Nitrogen-induced community shifts in plants and microbes modulate soil respiration responses to warming and rainfall changes
DOI: 10.48577/jpl.rgnd1t
title: The Many Applications of the NISAR Mission

description: No abstract available.
DOI: 10.48577/jpl.jgmxg8
title: Moving to the Cloud: Migrating a data processing workflow to the AWS Cloud

description: No abstract available.
DOI: 10.48577/jpl.ftyn8u
title: Optical-to-Orion (O2O) Ground Terminal (GT) at Table Mountain Facility (TMF)

description: No abstract available.
DOI: 10.48577/jpl.xfrriu
title: Back action evading measurements of a classical signal involving a dichromatic probe

description: No abstract available.
DOI: 10.48577/jpl.acgssn
title: Rethinking the Nature of Interstellar Dust

description: No abstract available.
DOI: 10.48577/jpl.k2shqn
title: Deep Learning for Deep Space Navigation

description: No abstract available.
DOI: 10.48577/jpl.fvdzyn
title: An Operational Strategy to Enhance Real-Time Spacecraft Track Monitoring using Automated Historical Context Generation

description: The Deep Space Network (DSN), managed by NASA’s Jet Propulsion Laboratory in Pasadena California, is a multinational, cooperative communications infrastructure for deep space communications and science applications. Use cases include tracking, telemetry, and commanding of NASA and partner-agency deep-space spacecraft. In addition to this, select radio astronomy, radio science, and radar activities also utilize the DSN. The network has operated with a high degree of reliability for over fifty years. New challenges are emerging however, including supporting more numerous (and smaller) spacecraft, as well as handling a greater complexity of operations due to increased requirements on network operational staff – specifically link-control operators (LCOs). Additionally, the DSN’s recent adherence to a “follow-the-sun” (FtS) model, where a given Deep Space Communications Complex (DSCC) operates the entire global network during its respective daylight hours, presents potential challenges including in terms of numerosity and diversity of equipment that LCOs need to monitor as more spacecraft and antenna are added to the DSN in the future. These challenges motivate the need for greater automation and operational intelligence tools to streamline and simplify the information the DSN presents to LCOs. In light of these challenges, we present an automation strategy for identifying and highlighting the historical performance context for spacecraft communication link operations. We propose a software called Track Augmentation and Performance Analysis System (TAPAS) to automatically generate analytic comparisons between historical spacecraft communication tracking scenarios (hereafter referred to as “tracks”) compared to real-time tracking scenarios as well as present a user interface strategy to communicate these complex calculations to LCOs in an intuitive way. Through TAPAS, it is our goal to offer a streamlined way for LCOs to simplify and reduce the time it takes to answer at least two key questions about ongoing, live spacecraft tracks: (1) is a given live (reference) track off-nominal compared to a historical baseline of similarly configured tracks, and (2) which segments of the reference track showcase a deviation, if at all, from historical tracks and why.
DOI: 10.48577/jpl.yibb9m
title: Investigating the Effects of California Wildfires using Satellite Observations of Solar-induced Chlorophyll Fluorescence

description: No abstract available.
DOI: 10.48577/jpl.fv9gqm
title: Alternate Grade Parts For Space Task Group

description: No abstract available.
DOI: 10.48577/jpl.fbsqhb
title: Timing Synchronization among UAVs Swarm via Quantum-Well Modulating Retroreflecting Optical Communication for Distributed Interferometric Antenna

description: No abstract available.
DOI: 10.48577/jpl.udbctu
title: Advances in Novel Spacecraft and Reflector Antenna Technologies

description: Through his 50-year career in antennas, Prof. Yahya Rahmat-Samii has had a profound impact on the development of spacecraft antennas used for planetary exploration and Earth Science. This paper highlights key advances in spacecraft antenna technology resulting from the work of Prof. Rahmat-Samii and his former students.