cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.wkls30
title: Toward a Model for Biological Contaminant Dispersal by Spacecraft Operating and Landing in Near-Vacuum

description: When spacecraft operate and land in near-vacuum, as for Earth’s Moon or icy moons like Enceladus, they introduce contaminant into their environments that may impact mission science at local and global scales. The rarefied gas dynamic plume flows generated by chemical propulsion systems may remove and dis-perse terrestrial particles borne on such spacecraft, including microbes and spores. These high-speed flows provide a unique vector for transport of biological contaminant far from a spacecraft in near-vacuum, i.e. in the absence of atmospheric drag. This paper describes the initial development of gas dynamic and orbital mechanics models for spacecraft-generated plume flows and induced particle transport, and an investigation of necessary boundary conditions to address two key questions: how can plume flows remove and disperse microorganism-laden particles or independent microorganisms borne on a spacecraft? And how can biological contaminants redeposit both locally (to the spacecraft, its instruments, and landing site) and globally (i.e. to regions of scientific interest)?
DOI: 10.48577/jpl.wcucx1
title: ECOSTRESS Science Data Collections

description: No abstract available.
DOI: 10.48577/jpl.3eb075
title: High energy cosmic ray detections with the standalone radio trigger system at the Owens Valley Radio Observatory Long Wavelength Array

description: Radio observations of cosmic ray air showers can characterize cosmic ray mass composition, via precise Xmax measurements, at the energies of the likely shift from Galactic to extragalactic sources. Advantages over other methods include lower cost instrumentation and the ability to observe in a range of weather conditions. However, detecting cosmic rays via their radio emission alone amid radio frequency interference (RFI), without reference to an alternate particle detector, is a significant challenge. The Owens Valley Radio Observatory LongWavelength Array (OVRO-LWA) cosmic ray detection system uses a multistage RFI rejection process including FPGA and CPU processing to address this challenge and operate in the presence of RFI. The OVRO-LWA is a multi-use array of 352 dual-polarization dipole antennas operating at 30—80 MHz. The array recently completed a major upgrade, including the addition of the cosmic ray detection system, which operates simultaneously with the other radio astronomy observing modes. Detections of cosmic ray candidates began in 2024. The dense antenna spacing of the OVRO-LWA offers the opportunity for testing and developing new Xmax reconstruction techniques, such as interferometric reconstruction. This presentation will describe the cosmic ray detection system, present the sample of cosmic ray candidates, and discuss plans for the future.
DOI: 10.5281/zenodo.17089467
title: Mapping the microbiome on the Tibetan Plateau for bioprospecting

description: Although high-elevation ecosystems play a crucial role in microbial diversity and evolution, they remain a blind spot in Earth’s microbiome research. This study conducted a large-scale metagenomic survey targeting six typical ecosystems on the Tibetan Plateau-the world’s highest and largest alpine region—collecting 1,729 environmental samples from 879 sites. Based on 55.3 Tb of sequencing data, we reconstructed 51,922 metagenome-assembled genomes (MAGs), from which 17,920 species-level taxonomic lineages were identified.
DOI: 10.5281/zenodo.17089468
title: Mapping the microbiome on the Tibetan Plateau for bioprospecting

description: Although high-elevation ecosystems play a crucial role in microbial diversity and evolution, they remain a blind spot in Earth’s microbiome research. This study conducted a large-scale metagenomic survey targeting six typical ecosystems on the Tibetan Plateau-the world’s highest and largest alpine region—collecting 1,729 environmental samples from 879 sites. Based on 55.3 Tb of sequencing data, we reconstructed 51,922 metagenome-assembled genomes (MAGs), from which 17,920 species-level taxonomic lineages were identified.
DOI: 10.48577/jpl.tk0ypx
title: Lifetime Limitations in Hall Thrusters Operating at High Current Density

description: The Jet Propulsion Laboratory (JPL) has developed the conducting-wall, magnetically shielded, 10-kW class, 3,000 s specific impulse H10 Hall thruster, which has demonstrated a 2:1 power throttling ratio at 800 V (~3,000 s Isp), efficiencies greater than 50% over 6:1 power throttling, and a 50:1 power throttling ratio over 0.2–10 kW. Hall2De simulations at 800 V suggest erosion of the inner pole cover can exceed 100 μm/kh when operating at or above 20 kW and can reach 1000 μm/kh at 50 kW. Erosion rates at the outer pole cover are an order of magnitude lower than those at the inner pole cover. At 300 V, erosion rates larger than 100 μm/kh are predicted at the inner and outer front pole covers above 6 kW. Thus, at the same discharge power, lifetime can be preserved by operating at higher voltages. Even at 800-V discharge voltage, long-life (~20 kh) operation of the thruster significantly (&gt;20 kW) above its nominal power does not seem feasible and future Hall thrusters capable of operating at more than 20 kW will likely need to maintain current density values similar to those nominal for the H10 in order to achieve long-life.
DOI: 10.48577/jpl.bsdcp0
title: Evaluation of ECOSTRESS Collection 2 Evapotranspiration Products: Strengths and Uncertainties for Evapotranspiration Modeling

description: No abstract available.
DOI: 10.48577/jpl.yoiiqo
title: Cassini-Huygens: Enabling Giant Steps in Saturn System Exploration

description: No abstract available.
DOI: 10.48577/jpl.hhryuj
title: Recommended Practices for the Experimental Characterization of Gridded Ion Engines

description: This paper provides a comprehensive overview of best practices for characterizing gridded ion engines. It is part of a series of papers designed to serve as guidebooks for the consistent operation and characterization of electric propulsion devices. Understanding and optimizing gridded ion engine performance requires effective methods for measuring operational parameters. These measurements not only offer valuable insights into engine performance, but provide the information needed for flight, as well as enabling direct, meaningful comparisons with existing literature. Additionally, this document informs modelers about the measurement methods and conditions under which performance data were obtained, providing a foundation for model validation and cross-comparison with other engine systems. Methods to characterize the engine are drawn from numerous approaches in the experimental methods sections of thruster publications as well as in texts such as that of Katz and Goebel. In this paper, we highlight key characterization procedures found in the literature and consolidate these methods into a single document. Key performance parameters and how to measure them include: 1) perveance limits, 2) neutralizer operating modes, 3) discharge losses, 4) back-streaming limits, and 5) ion transparency. This work is based on the best approaches developed by national laboratories, space agencies and universities worldwide to understand the transportability of these methods. Transportability is essential to enable comparison of measured performance characteristics from laboratories around the world. This document is intended to serve as a compact guide for those new to the field to for the implementation of best practices for experimental characterization of gridded ion engines.
DOI: 10.48577/jpl.bxw9dy
title: NASA’s Cold Atom Lab (CAL): Quantum Science and Technology Maturation on the ISS

description: No abstract available.
DOI: 10.48577/jpl.xayfgf
title: Study of Hollow Cathode Plume Instabilities Onset using a Fast-Scanning Probe

description: Plasma instabilities play a fundamental role in determining the lifetime of hollow cathodes and, consequently, the operative life of electric thrusters. Three main categories have been identified: ionization instabilities, rotational instabilities, and turbulent ion acoustic instabilities (IAT). Ionization instabilities typically arise when the cathode operates in plume mode and decrease at lower discharge currents and mass flow rate ratios. Rotational instabilities occur in the presence of an externally applied axial magnetic field, even under spot-mode operation, while IAT develops at frequencies &gt; 100kHz. Several studies have suggested that plasma instabilities are linked to the generation of high-energy ions, which are responsible for keeper surface erosion and thus limit cathode lifetime. This paper presents results on the onset of plasma instabilities in a 25 A-class cathode, investigated using a fast-scanning axial probe capable of probing the cathode orifice region. By means of FFT and CWT analysis, the mode frequencies have been identified and their spatial localization on the centerline with respect to the cathode orifice has been observed. In the absence of an applied magnetic field, ionization instabilities have been detected at low mass flow rates, with characteristic frequencies that increase as the flow rate decreases. In the presence of an axial magnetic field, rotational instabilities couple with turbolent ion acoustic instabilities, leading to the generation of more energetic ions, and also interact with ionization instabilities when the cathode operates in plume mode. The CWT plots demonstrate that rotational bursts are stronger just downstream of the keeper orifice, where sputtering occurs. The dynamics of these rotational instabilities, tracked with the scanning probe, supports the presence of kink-type instabilities in the plume, even at low discharge currents.
DOI: 10.48577/jpl.1tnphl
title: Hydrodynamical and Chemical Modeling of Jupiter’s Atmosphere – Updates on the Deep Water Abundance

description: No abstract available.
DOI: 10.48577/jpl.xqvukc
title: Level ! Collection 3 Updates

description: No abstract available.
DOI: 10.15468/dl.dwdqks
title: Occurrence Download

description: A dataset containing 142 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-3.73574 36.10871,-0.26311 36.10871,-0.26311 37.49715,-3.73574 37.49715,-3.73574 36.10871))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Theba subdentata"
 ]
}

 The dataset includes 142 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001882-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.b0k4bu
title: Titan Science: From Voyager 1 to the discoveries of Cassini-Huygens

description: No abstract available.
DOI: 10.48577/jpl.pvwvkn
title: Simultaneous Calibration of Anomalous Electron Collision Frequency and Anomalous Electron Heating in a Hall Thruster Simulation

description: This paper presents a novel method of calibrating anomalous electron phenomena in fluid simulations of Hall thrusters. Specifically, this paper presents methods to calibrate the anomalous electron collision frequency, ν_ea, with measurements of the azimuthal electron drift velocity, u_eθ, and to calibrate the anomalous electron heating, Q_ea, with measurements of the electron temperature, T_e. These methods are implemented in the Hall2De simulation code with incoherent laser Thomson scattering measurements of the axial profiles u_eθ and T_e along the channel centerline of a Hall thruster. Two primary simulations are considered, one that calibrates only ν_ea and another that simultaneously calibrates ν_ea and Q_ea. In addition, auxiliary simulations are calibrated using the uncertainty bounds of the measured u_eθ and T_e axial profiles that produce corresponding uncertainties in the axial profiles of ν_ea and Q_ea. We find that both primary simulations exhibit a sharp local minimum in ν_ea at the axial location corresponding to the maximum of u_eθ. It is found that uncertainties in u_eθ produce large uncertainties in the downstream portion of the ν_ea profile. However, when only uncertainties in T_e are considered, there is a measurable difference in the ν_ea profiles between the two primary simulations. Lastly, while there is significant ambiguity in the calibrated profile of Q_ea, the calibrated profile shows significant deviation from the phenomenological model of Q_ea typically used in Hall thruster fluid simulations.
DOI: 10.15468/dl.wd6kn8
title: Occurrence Download

description: A dataset containing 151 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Labeo parvus)",
 "BasisOfRecord is one of (Specimen, Literature Occurrence, Human Observation, Observation)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1991",
 "Year is less than or equal to 2025"
 ]
}

 The dataset includes 151 records from 14 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001887-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7ftwm4
title: Occurrence Download

description: A dataset containing 25 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Epuraea imperialis",
 "Country is Belgium",
 "HasCoordinate is true"
 ]
}

 The dataset includes 25 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001883-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.y1jvj3
title: Thermally Sensitive ECOSTRESS Evapotranspiration Model Ensemble Evaluation and Development

description: No abstract available.
DOI: 10.15468/dl.g2a42b
title: Occurrence Download

description: A dataset containing 20 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Epuraea imperialis",
 "Country is France",
 "HasCoordinate is true"
 ]
}

 The dataset includes 20 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001884-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.zt2vp5
title: Measurement Definition Team 1 (MDT-1)

description: No abstract available.
DOI: 10.15468/dl.vd4rsq
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Epuraea imperialis",
 "Country is Italy",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001885-250920141307145/datasets/export for details.
DOI: 10.48577/jpl.bwkuij
title: Built to Break, Designed to Protect: Developing and Implementing 3D-Printed Crushable Lattices for Space Exploration

description: No abstract available.
DOI: 10.48577/jpl.bya18c
title: Detection of Plastics Using the Space-Based EMIT Imaging Spectrometer

description: No abstract available.
DOI: 10.15468/dl.ymbp2v
title: Occurrence Download

description: A dataset containing 40435 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Occurrence evidence, Human Observation, Observation)",
 "Country is Romania",
 "Geometry POLYGON((21.9344 44.35378,22.06735 43.86055,22.64348 43.28259,25.2804 43.05634,26.74289 43.3793,28.16106 43.63645,29.13605 44.32208,29.66786 44.41713,30.19968 44.66981,30.19968 45.48347,29.80082 45.82423,28.91446 46.00922,27.93947 46.03999,27.49629 45.54558,26.96448 45.01546,26.16675 44.5436,24.39404 44.32208,23.26393 44.70132,21.9344 44.35378))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Tracheophyta",
 "Year 1990-2025"
 ]
}

 The dataset includes 40435 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001886-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.tbx0xq
title: On the Size of the Mission Suite Enabled by NASA's Deep Space Network

description: No abstract available.
DOI: 10.48577/jpl.cnxshh
title: Collection 3 Level 1 Processing and Product Updates

description: No abstract available.
DOI: 10.48577/jpl.96qz3n
title: ECOSTRESS SATM

description: No abstract available.
DOI: 10.48577/jpl.so4m6s
title: BRDF Validation for Vicarious Calibration Using Resampled OCO-2/3 Radiance and Geometry Data

description: No abstract available.
DOI: 10.48577/jpl.dcuyds
title: Multi-Instrument High –Resolution Characterization of the PBL using tomography techniques

description: No abstract available.
DOI: 10.15468/dl.482fx4
title: Occurrence Download

description: A dataset containing 40 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is China",
 "Geometry POLYGON((97 26,109 26,109 35,97 35,97 26))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Melliodendron xylocarpum",
 "Year 1000-2025"
 ]
}

 The dataset includes 40 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001888-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.k740cb
title: Ecostress Wildfire Applications

description: No abstract available.
DOI: 10.48577/jpl.ew7bno
title: Simultaneous Modeling of water-leaving Reflectance and Sun and Sky Glint Contributions from Imaging Spectroscopy Measurements

description: No abstract available.
DOI: 10.48577/jpl.ew3rtm
title: Feasibility Study of a Forked Grating Scalar Vortex Coronagraph for the Habitable Worlds Observatory

description: No abstract available.
DOI: 10.48577/jpl.ychhdr
title: Data fusion pipeline leveraging HLS, VIIRS, and EMIT data for mapping snow properties

description: No abstract available.
DOI: 10.15468/dl.abnkda
title: Occurrence Download

description: A dataset listing the 947 species recorded in GBIF matching the query:
{
 "TaxonKey" : [
 "is Pinus"
 ]
}

 The dataset's 947 records were derived from 3888 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001871-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5683/sp3/jja6fv
title: Census of Population, 1986 [Canada]: Basic Summary Tabulations, Enumeration Area Level

description: This dataset contains enumeration area level data for the following topics: census families, demography, dwellings, ethnocultural, households, income, labour force, language, mobility, mother tongue, and schooling.
description: Census of Population
DOI: 10.5683/sp3/twg5io
title: Census of Population, 1986 [Canada]: Basic Summary Tabulations, Census Tract Level

description: This dataset contains census tract level data for the following topics: census families, demography, dwellings, ethnocultural, households, income, labour force, language, mobility, mother tongue, and schooling.
description: Census of Population
DOI: 10.5683/sp3/tj6ufe
title: Census of Population, 1986 [Canada]: Basic Summary Tabulations, Census Subdivision Level

description: This dataset contains census subdivision level data for the following topics: census families, demography, dwellings, ethnocultural, households, income, labour force, language, mobility, mother tongue, and schooling.
description: Census of Population
DOI: 10.5683/sp3/amgrwz
title: Gross State Product quarterly data, 1977-2005

description: &lt;p&gt;At the state level, Gross State Product (GSP) is the state counterpart of national GDP. It measures the output of goods and services produced in a state. Unlike the national level, the Department of Commerce generates only annual estimates of GSP. In early 2003, e-forecasting undertook a major project to create quarterly consistent estimates of GSP for all fifty states and the District of Columbia. A year later, the project was completed and long time quarterly series are now maintained for client use in the database. Includes: real Gross State Product (GSP), nominal GSP, and price index for GSP history. Quarterly data, 1977-2005q3. Excel format.&lt;/p&gt;
DOI: 10.5683/sp3/pm3phk
title: Australian election statistics, 2001

description: &lt;p&gt;Official statistics for the 2001 federal election held on 10 November 2001. Files for House of Representatives and Senate, by state and division. Background documents describe the methologology of conducting the 2001 Australian election. Includes: election timetable, registered parties, polling places and staff, public funding payments, enrolment statistics, declaration votes issues, declaration voted received, party representation.&lt;/p&gt;
description: Original dissemination medium: CD-ROM. The CD-ROM can be consulted in-person at the Map & Data Library, or ordered for free from the Australian Election Commission http://results.aec.gov.au/10822/Website/index.html.

5 data files in txt format (number of logical records varies) and 26 accompanying documentation in pdf format
DOI: 10.5683/sp3/qrttcf
title: Domestic exports data, 1966-1983

description: &lt;p&gt;Annual records of Canadian domestic exports, showing export commodity class (5-digit code), country, region of lading, mode of transport, year, value (Canadian $) and unit of quantity.&lt;/p&gt;
description: Obtained from University of British Columbia Data Library 2000-05-11.
DOI: 10.5683/sp3/pfnjgj
title: Imports data, 1966-1984

description: &lt;p&gt;Annual records of Canadian imports, showing import commodity class (5-digit code), country of origin, region of clearance, province of clearance, year, value (Canadian $) and unit of quantity.&lt;/p&gt;
description: 4 files total (2 data and 2 documentation)
DOI: 10.5683/sp3/hziplu
title: Index of Consumer Confidence (ICC)

description: &lt;p&gt;The Index of Consumer Confidence based on the Conference Board's survey of Canadian households measures consumers' levels of optimism regarding current economic conditions.&lt;/p&gt;

&lt;p&gt;The Index of Consumer Confidence survey is based on four attitudinal questions. Data is collected on each respondent's age, sex, marital status, and geographic location of residence. The four questions are:&lt;/p&gt;

&lt;ol&gt;
 &lt;li&gt;Considering everything, would you say that your family is better or worse off financially than six months ago? &lt;/li&gt;
 &lt;li&gt;Again, considering everything, do you think that your family will be better off, the same or worse off financially six months from now? &lt;/li&gt;
 &lt;li&gt;How do you feel the job situation and overall employment will be in this community six months from now? &lt;/li&gt;
 &lt;li&gt;Do you think that right now is a good or bad time for the average person to make a major outlay for items such as a home, car or other major item?&lt;/li&gt;
&lt;/ol&gt;

&lt;p&gt;Data from 2002-2017 is available on a monthly basis, while data from 1972-2001 is available on a quarterly basis.&lt;/p&gt;
DOI: 10.15468/dl.h6cde7
title: Occurrence Download

description: A dataset containing 155 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Africa",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Busseola fusca Fuller, 1901"
 ]
}

 The dataset includes 155 records from 9 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001350-250127130748423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.