cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5066/p9aqsrvh
title: Bathymetry, topography, and acoustic backscatter data, and a digital elevation model (DEM) of the Cache Slough Complex and Sacramento River Deep Water Ship Channel, Sacramento-San Joaquin Delta, California

description: This data release presents bathymetric and topographic data from surveys performed between 2017 and 2018 in the Cache Slough Complex and the Sacramento River Deep Water Ship Channel (DWSC), northern Sacramento-San Joaquin Delta, California. The shallow, highly vegetated aquatic habitats of this region necessitated a variety of survey platforms and techniques. In the deeper channels, swath bathymetry data were collected using a 234.5 kHz interferometric sidescan sonar pole-mounted to the 26-ft R/V San Lorenzo. In smaller channels and shallow areas not accessible with the larger survey vessel, swath bathymetry data were acquired with Kelpfly, a personal watercraft (PWC) equipped with a 468 kHz interferometric sidescan sonar. Two PWCs equipped with 200 kHz single-beam sonars were primarily used to survey the large, gently sloping flooded agricultural tracts and areas with dense submerged vegetation. Topographic data were collected by hiking over the land surface, with global navigation satellite system (GNSS) receivers mounted on backpacks. However, this method was largely ineffective in marshes because of the difficulty in traversing the dense, tall vegetation. The combination of these techniques resulted in good coverage of the main channels and shallow, open water embayments. These new bathymetric and topographic data were merged with existing recent datasets to produce seamless digital elevation models (DEMs) of the Cache Slough Complex and of the DWSC with a grid resolution of 1 m. Funding for these surveys and generation of the DEMs was provided by the U.S. Bureau of Reclamation in support of ongoing field experiments and numerical modeling to improve our understanding of habitat quality, the influence on various landscape features on ecosystem function, and the effects of restoration actions in the Sacramento-San Joaquin Delta.
DOI: 10.5281/zenodo.806811
title: Github Open Source Survey 2017

description: Data and accompanying documentation for the Open Source Survey fielded by GitHub and collaborators in 2017. Respondents were sourced via random sampling from traffic to licensed open source repositories on GitHub.com and from invitations sent to selected open source communities that work on other platforms. The files here include a README, a full copy of the (English) questionnaire, notes for working with the data, and two CSV data files. A report based on the subset of responses sampled from GitHub.com is available at http://opensourcesurvey.org/2017/. 

See the README for details on sampling methodology, and notes and questionnaire files for question wordings, response options, branching logic, and recoded variables.
DOI: 10.5281/zenodo.8145484
title: LENS and NoPin (NP) ensemble means for apparent oxygen utilization (AOU), anthropogenic and preindustrial carbon, pCFC-12, and ideal age from Olivarez et al. (2023)

description: Manuscript title: <strong>"How does the Pinatubo eruption influence our understanding of long-term changes in ocean biogeochemistry?"</strong> Authors: Holly C. Olivarez<sup>1,2</sup>, Nicole S. Lovenduski<sup>2,3</sup>, Yassir A. Eddebbar<sup>4</sup>, Amanda R. Fay<sup>5</sup>, Galen A. McKinley<sup>5</sup>, Michael N. Levy<sup>6</sup>, and Matthew C. Long<sup>6</sup> Affiliations:<br> <sup>1</sup>Department of Environmental Studies, University of Colorado, Boulder, CO, USA <br> <sup>2</sup>Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO, USA<br> <sup>3</sup>Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, USA <br> <sup>4</sup>Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA <br> <sup>5</sup>Columbia University and Lamont-Doherty Earth Observatory, Palisades, NY, USA <br> <sup>6</sup>Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, Colorado, USA LENS and No Pinatubo (NoPin in manuscript, NP in file names) CESM ensemble means for apparent oxygen utilization (AOU), anthropogenic and preindustrial carbon, <em>p</em>CFC-12, and ideal age along GO-SHIP transects akin to A16N, A16S, P16N, P16S, SO4I, SO4P. The CESM source code is freely available at http://www2.cesm.ucar.edu. The model outputs described in this paper can be accessed at www.earthsystemgrid.org.
description: Anthropogenic carbon is calculated by subtracting DIC_ALT from DIC. Preindustrial carbon is labeled DIC_ALT.
DOI: 10.5880/sfb806.61
title: Geodata of continuous and discontinuous permafrost during the last glacial maximum in Europe

description: This geodata contains shapefiles of continous and discontinous permafrost during the last glacial maximum in Europe as published in Lehmkuhl et al. (accepted). The data is based on published maps (Andrieux et al., 2016; Ruszkiczay-Rüdiger and Kern, 2016; Vandenberghe et al., 2014). Further methodological information can be found in Lehmkuhl et al. (accepted). A layer package file is included that can be used to obtain the same visual appearance as published. References Andrieux, E., Bertran, P., Saito, K., 2016. Spatial analysis of the French Pleistocene permafrost by a GIS database: French Pleistocene permafrost database. Permafrost and Periglac. Process. 27, 17–30. https://doi.org/10.1002/ppp.1856 Lehmkuhl, F., Nett, J.J., Pötter, S., Schulte, P., Sprafke, T., Jary, Z., Antoine, P., Wacha, L., Wolf, D., Zerboni, A., Hošek, J., Marković, S.B., Obreht, I., Sümegi, P., Veres, D., Zeeden, C., Boemke, B.J., Schaubert, V., Viehweger, J., Hambach, U., accepted. Loess landscapes of Europe - mapping, geomorphology, and zonal differentiation. Earth-Science Reviews. Ruszkiczay-Rüdiger, Z., Kern, Z., 2016. Permafrost or seasonal frost? A review of paleoclimate proxies of the last glacial cycle in the East Central European lowlands. Quaternary International 415, 241–252. https://doi.org/10.1016/j.quaint.2015.07.027 Vandenberghe, J., French, H.M., Gorbunov, A., Marchenko, S., Velichko, A.A., Jin, H., Cui, Z., Zhang, T., Wan, X., 2014a. The Last Permafrost Maximum (LPM) map of the Northern Hemisphere: permafrost extent and mean annual air temperatures, 25-17 ka BP: The Last Permafrost Maximum (LPM) map of the Northern Hemisphere. Boreas 43, 652–666. https://doi.org/10.1111/bor.12070
DOI: 10.13026/qj5m-n649
title: Electroencephalogram and eye-gaze datasets for robot-assisted surgery performance evaluation

description: Surgical training and patient safety depend on objective and accurate
performance evaluation. Robot-assisted surgery (RAS) is newer and its training
less well defined, but resources are not easily accessed to support data
collection from participants with various RAS skill levels. This work
describes and makes available for public use electroencephalogram (EEG) and
eye-gaze data collected from 25 participants performing RAS simulator tasks
with varying levels of RAS experience.Twenty-seven tasks from six modules of
the _da Vinci ®;Skills Simulator _™, which are standard elements of most RAS
surgical skills training curricula, were taken into consideration. The dataset
contains performance scores (scale: 0 to 100) generated by the simulator after
each exercise was completed. Each task was completed by the participants at
least twice, and if they weren't able to complete it with a score of 70 (out
of 100) on at least one try, they tried again until they did. The National
Institute of Biomedical Imaging and Bioengineering (NIBIB) and Roswell Park
Comprehensive Cancer Center (RPCCC) supported the collection of data for use
in RAS training, which is why the dataset has been named the NIBIB-RPCCC-RAS
performance evaluation dataset. The dataset contains 1636 EEG recordings (in
the "*.edf" format), 1559 eye-gaze recordings (in the "*.csv" format),
performance scores, and participant demographic data, such as age, gender, and
dominant hand. To our knowledge, this is the first shared dataset that
contains EEG and eye-gaze data from participants with a variety of RAS
experiences who performed all tasks included in the da Vinci simulator
modules.
DOI: 10.15151/esrf-es-1409736691
title: The Iberian cryoEM community BAG

description: The Iberian cryoEM BAG is a large consortium (&gt; 30 groups) composed of Portuguese and Spanish groups working in biologically relevant problems including disease related metabolic enzymes, antibiotic resistance, DNA replication and DNA maintenance, protein synthesis, virus structure and mechanisms, and macromolecular complexes involved in the control of key cellular processes like protein folding and degradation.
DOI: 10.48577/jpl.bect43
title: Orbit of the Patroclus-Menoetius binary system and predicts for the 2024/2025 mutual events season

description: We report on the ephemeris development for Menoetius, the satellite of Patro19 clus. Our data set contains ground–based and HST relative astrometry, as well as 20 42 lightcurves from the mutual events seasons in 2007, 2012, and 2017/2018. The next season of mutual events starts in February of 2024 and lasts until Jan32 uary of 2025. The Patroclus system is in opposition for the observers on Earth in 33 late September and is suitable for observations of the mutual events with an edge-on 34 geometry in October.
DOI: 10.48577/jpl.vhhc5h
title: Performance Analysis of the Lander’s UHF Antenna for the Mars Sample Return Mission

description: Abstract—This paper presents an investigation of the Radio-Frequency (RF) performance of the UHF antenna employed on the Sample Retrieval Lander (SRL) for the Mars Sample Return mission. The antenna is used for the radio communication with the orbital spacecraft and its operation is impacted by the presence of the lander deck, instruments located in close proximity, solar panels, and the Martian terrain. To evaluate the degradation of antenna radiation pattern, numerical analyses have been carried out in Ansys HFSS using the Finite-Element Method (FEM). The study was validated by repeating the simulation using a hybrid technique that employs the Integral Equation (IE) method.
DOI: 10.48577/jpl.o4ulbe
title: LunaNet Governance: Organizing and Planning for LunaNet Operations

description: Abstract LunaNet has been conceived as the lunar Internet and more, providing services for communications, networking, position, navigation, and timing (CPNT) for spacecraft and users in transit to and from the Moon, in orbit around the moon, in transit to and from the surface, and on the surface. It is envisioned to unify and integrate, for cislunar users, the services that are presently provided separately in the Earth terrestrial environment by space communications satellites, Global Navigation Satellite Systems (GNSS), ground tracking networks, and the Internet. LunaNet is planned to be an open, international architecture with contributions from multiple organizations including international civil space agencies, commercial service providers, academic institutions, and other organizations. Using a combination of conventional and emerging technologies, LunaNet will create a lunar-centric network-of-networks that inherits some features of the terrestrial Internet but has unique characteristics that will drive substantially different operations. Government acquisition efforts have already begun to procure commercial lunar communications and navigation services. A multi-stakeholder approach to developing the community-wide concepts of operation has been initiated by the Interagency Operations Advisory Group (IOAG), which is formed of international government space agencies, that includes other international organizations such as the Internet Society, Internet Engineering Task Force, International Committee on GNSS, and Space Frequency Coordination Group as well as industry and academic participants. Products of the Committee to Study LunaNet Governance (CSLG) will include: the recommendation and definition of an initial international organizational governance structure; associated roles, responsibilities, and processes; and recommended steps to implement the governance approach. This paper will describe the plan for developing these concepts and coordinating them among the participating organizations. Keywords: communications, networking, navigation, governance
DOI: 10.48577/jpl.xvqlix
title: Towards compact fire infrared radiance spectral tracker (c-FIRST)

description: In this presentation we will describe the technologies developed at the Jet Propulsion Laboratory for space remote sensing applications in mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) spectral regions. Remote sensing and characterization of high temperature targets on the Earth’s surface is required for many cross-disciplinary science investigations and applications including fire and volcano impacts on ecology, the carbon cycle, and atmospheric composition. For decades this research has been hindered by insufficient spatial resolution and/or detector saturation of satellite sensors operating at short and mid-infrared wavelengths (1-5μm) where the spectral radiance from high temperature (&gt;800 K) surfaces is most significant. To address this critical need, the Jet Propulsion Laboratory and partnering institutions are developing a compact modular high dynamic range (HDR) multispectral imager concept, with the flexibility to operate in the short, mid- or long-wavelength infrared spectral bands.
DOI: 10.48577/jpl.xxp1wa
title: Oversubscribed Scheduling for NASA’s Deep Space Network: A Comparison of Optimization Techniques

description: This paper describes a comparison of search methods applied to the same problem of scheduling activities for NASA's Deep Space Network (DSN). The DSN consists of large (34- and 70-meter) radio antennas at three sites around the world, and provides communications and navigation support for dozens of space missions. The DSN is oversubscribed -- more time is requested than can be accommodated -- and it is an ongoing challenge to efficiently schedule the available resources while also balancing the satisfaction of requests from the disparate set of users. As part of a study of state-of-the-art solution techniques for oversubscribed scheduling, a standard set of problems was defined, and solutions were attempted with several classes of algorithms developed by different teams. These included variants of Quantum Annealing (QA), Mixed-Integer Linear Programming (MILP), and Constraint Satisfaction Problem (CSP) based heuristic search (CSP-HS). The results of this comparison show that the heuristic search method CSP-HS significantly outperforms the other methods in the study in terms of solution quality and runtime performance, when objectives are to maximize the ``fairness'' of the resulting schedule (e.g. minimize starving some users at the expense of others) while simultaneously clearing all constraint violations and fitting as much as possible into the schedule. CSP-HS shows progressively better performance on more oversubscribed problems. The set of benchmark problems is made openly available for other groups to try.
DOI: 10.48577/jpl.e1hx3o
title: NASA’s Deep Space Network (DSN) Lunar Exploration Upgrades (DLEU)

description: In the near future, the National Aeronautics and Space Administration (NASA) will return humans to the moon beginning the next era of human exploration. NASA’s Space Communications and Navigation (SCaN) program will play a vital role in establishing communications and navigation support to realize the ambitious goals of the Artemis program. SCaN’s overall lunar communications support plan will be covered in a separate 2023 SpaceOps paper: “NASA’s Communications and Navigation Architecture Plans to Support the Return to the Moon and a Sustainable Lunar Presence.” The four-point plan, as it currently stands, includes lunar relay services, a dedicated set of new ground stations, international partner contributions, and support through the Deep Space Network (DSN) and associated upgrades. This paper will have a more granular focus on the DSN and NASA’s plans to upgrade and expand the network to be better suited for human spaceflight on and around the lunar surface. NASA’s Deep Space Network (DSN) will be a critical communications component for the upcoming lunar activities. There will be multiple spacecraft, using different bands, and some of those spacecraft will be transmitting and receiving using multiple bands, requiring DSN support of S-band (2 GHz), X-band (7 GHz up, 8 GHz down), and K-band (22.5 GHz up, 26 GHz down). Since there may be more than one spacecraft in the beamwidth of the DSN antennas, the DSN support will require an extension of the DSN’s capability to support multiple spacecraft using one antenna, expanding it to provide two simultaneous uplinks in the different bands at each antenna. Achieving this requires using new techniques for manufacturing the frequency selective surfaces, called dichroics, which steer the different frequency beams from and to the appropriate transmitting and receiving equipment, along with the addition of a new K-band uplink system. Additionally, due to the relative closeness of the moon from Earth (as opposed to the planetary missions the DSN supports daily), significantly higher data rates on both uplink and downlink are required are possible and desirable by the lunar missions, specifically up to 20 Mbps on the uplink and 150 Mbps on the downlink, both using Low Density Parity Check (LDPC) error correcting codes. And, again due to the relative closeness of the moon, there is a need for low latency data delivery of the high rate downlink telemetry which requires a change in the current DSN paradigm of delivering higher rate data with higher latency.
DOI: 10.48577/jpl.gxz7kc
title: The Deep Space Optical Communications Project Ground Laser Receiver

description: The Deep Space Optical Communication (DSOC) project will conduct its technology demonstration concurrently with NASA’s Psyche mission, which hosts the DSOC flight transceiver (FLT) on its spacecraft. The DSOC Ground Laser Receiver (GLR) has been developed by the Jet Propulsion Laboratory and installed at the Palomar Observatory 5m Hale telescope in order to receive the optical downlink signal from the FLT, and is capable of processing discrete downlink data rates from 56 kbps to 265 Mbps over the course of the mission spanning an approximate range of 0.06 to 2.7 AU. In this paper we review the architecture of the completed GLR and its subsystems: (i) the GLR Optics Assembly (GLROA) that acquires the downlink signal and couples it to (ii) the GLR Detector Assembly (GDA) that features a superconducting nanowire single photon counting detector (SNSPD) array, (iii) the GLR Signal Processing Assembly (GSPA) that demodulates and decodes the pulse-position-modulated downlink waveform, and (iv) the GLR Monitor and Control software that is used to interface with the Hale telescope and operate the entire system. We discuss GLR operations in response to planned DSOC downlink activities, and present key results from end-to-end performance tests conducted with FLT hardware, as well as operational readiness test results that demonstrate Ground Laser Receiver station readiness to meet DSOC objectives.
DOI: 10.48577/jpl.xj0pho
title: Local scale air quality impacts in the Los Angeles Basin from increased port activity during 2021 supply chain disruptions

description: Increased throughput and container ship backlogs at the Ports of Los Angeles and Long Beach due to supply chain disruptions related to the Covid-19 pandemic caused a significant increase in the number of ships near the California coast, leading to concerns about increased air pollution exposure of nearby communities. We use a combination of satellite-based observations from TROPOMI and ground-based observations from routine surface monitoring sites with chemical transport model results to analyze the changes in NO2 and PM2.5 in the Los Angeles Basin during a period in 2021 when the number of ships was at its peak. Using simulations to account for meteorological effects, changes are apportioned to emissions and meteorology. The largest emission-related changes in column NO2 occurred immediately east of the ports where emission-related NO2 increased by 28% compared to the baseline (2018-2019 average). In Central Los Angeles emission reductions led to a 10% decrease in NO2 during the same period. Emission-related PM2.5 increased by 0.7 µg/m3 on average with a maximum increase of 4.5 µg/m3. The emission/meteorology attribution method presented here provides a way to infer emission-influenced changes in air quality that are consistent with observations and suggests that both NO2 and PM2.5 were elevated in parts of the Los Angeles area during a period of increased port activity.
DOI: 10.48577/jpl.kj2vyg
title: Magnetically Shielded Miniature Hall Thruster: Flight Qualification, LIF, and Krypton Performance

description: Experimental and theoretical studies of magnetic shielding of Hall thrusters have shown significant enhancement of lifetime through reduced erosion of the thruster discharge channel. This enabling technology provides the capability for Hall thrusters to operate in deep space missions. A low power variant of a thruster with this technology - the Magnetically Shielded Miniature (MaSMi) Hall thruster - was developed at JPL to operate at relatively low powers of 200 - 1500 W with total efficiency as high as 60%. This thruster successfully passed flight qualification through JPL and was recently licensed to ExoTerra Resource for flight production (renamed Halo12), where additional flight qualification was instigated to extend its known capabilities. Under this program, the long duration wear test has been extended beyond the previous 7205 h duration and 1.55 MN-s total impulse for a total of 8187 h duration and 1.734 MN-s total impulse. Laser Induced Fluorescence measurements of the plasma shows the thruster operation is relatively invariant to off-nominal conditions, such as elevated background pressure, thruster temperature, and off-nominal magnetic field strength. Performance measurements of the thruster were conducted for krypton, which showed a familiar efficiency gap compared to xenon, however the performance was still as high as 51%.
DOI: 10.48577/jpl.irb6gv
title: Preliminary Feed Assembly Design for INCUS

description: This paper presents a preliminary feed assembly design for a new Earth science mission to be flown on a small satellite platform, recently approved by the National Aeronautics and Space Administration (NASA). The feed consists of a cluster of seven identical feedhorns at Ka-band fed by WR28 waveguides. Detailed RF and mechanical models are presented for both the feedhorns and the feeding waveguide runs. RF performance, including gain, insertion loss and coupling between feeds will also be discussed. Finally, details about the proposed preliminary fabrication approach will be provided, including a prototype single horn recently fabricated at the Jet Propulsion Laboratory (JPL).