cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.7ue9os
title: WORKFLOWS FOR NISAR DATA PROCESSING TO ADDRESS SOLID EARTH SCIENCE IMPLEMENTED ON THE ON-DEMAND CLOUD SYSTEM

description: In preparation for the launch of the NASA ISRO Synthetic Aperture Radar (NISAR) mission in 2024, the NISAR Project Science Team is building workflows for each Science Team discipline (Ecosystems, Cryosphere, and Solid Earth), for the purpose of accommodating large data volumes and ensuring that the quality of the measurements collected by NISAR meets the requirements to address the scientific goals proposed for the mission. This paper will focus on the processing workflow for Solid Earth, addressing observations of coseismic, transient, and secular deformation. The workflow includes the use of standard NISAR %GeocodedGeo-coded Unwrapped (GUNW) Level-2 products, as well as the processing of Level-1 Single Look Complex images in Radar coordinates (RSLC) %products into additional Level-2, and subsequently Level-3, science products using the published Algorithm theoretical Basis Documents (ATBDs). Each ATBD is available as a Python Jupyter Notebook and is currently implemented in an On-Demand JupyterHub environment. We test the workflow using JAXA ALOS-1 and ALOS-2 Single-Look %Complext Complex (SLC) data, which we convert to NISAR-like SLCs and process to simulate NISAR Level-2 GUNWs. We also provide the user with the option to create customizable networks of geocoded unwrapped interferograms using the ISCE-3 software (Rosen, 2012). The interferograms are used as inputs into each ATBD notebook, to produce Level-3 products and analyze the quality of the resulting measurements of deformation relative to the defined mission requirements. We use the Miami InSAR time series software in Python (MintPy) (Yunjun, 2019) to create the Level-3 deformation time series and velocity field products. We implement the described workflow on the NISAR on-demand cloud-based processing system. This workflow provides the Solid Earth focus group of the NISAR Science Team the tools to test their algorithms and prepare for calibration and validation of the real NISAR data after the NISAR launch.
DOI: 10.48577/jpl.sciz7o
title: New Small Mobile Ozone Lidar instrument with extended capability for stratospheric ozone monitoring (SMOL-X)

description: In 2022-2023, the JPL Table Mountain Atmospheric Lidar Team developed several affordable, compact and automated mobile tropospheric ozone lidars (Small Mobile Ozone Lidar, or SMOL) that can be quickly deployed on the field for air quality studies and satellite validation (see companion abstract by Chouza et al.). Leveraging on technical and field deployment experience acquired with the SMOL instruments, a new system with extended capability was developed with the objective of measuring ozone throughout the lower and mid-stratosphere (up to 37 km) with a precision better than 10% for a time resolution of a few hours. The concept is similar to the SMOL systems, i.e., automated, compact, and affordable enough to deploy multiple units in a highly strategic and synergistic way. The performance of this new SMOL-X instrument will be presented, and several deployment configurations will be proposed in the context of the anticipated reduced spaceborne stratospheric ozone monitoring capability
DOI: 10.48577/jpl.qv9uey
title: Machine Learning Application for Lambert’s Problem

description: This study presents a neural network Lambert’s approximator, a novel approach to address Lambert’s problem using deep learning. The main contribution lies in providing a means to approximate transfer trajectories for preliminary mission design, utilizing machine learning in conjunction with prior knowledge in astrodynamics. By normalizing the gravitational parameter of a central body and initial distance, this approach is applicable to any two-body system, encompassing not only interplanetary trajectories but also moon tour problems. The proposed neural network model, trained on a dataset of transfer trajectories, demonstrates efficiency in approximating these trajectories. The study delves into the neural network architecture, training methodology, and performance evaluation, highlighting the potential of this approach to enhance the efficiency of preliminary mission design processes. The performance evaluation of the presented approximation approach is conducted with a Porkchop plot validation, speed test, and mission design applications such as the Cassini trajectory and Europa Clipper trajectory.
DOI: 10.48577/jpl.u8euqq
title: Europa Clipper Power Subsystem Implementation and Lessons Learned

description: The Europa Clipper Mission presents a unique set of challenges for a power subsystem due to the combination of the following: the use of solar power for an outer planets mission, the Jovian radiation environment, a dynamic and intense science campaign, and a suite of scientific instruments that are sensitive to electromagnetic interference. To develop a robust power system capable of satisfying all mission requirements, both the external environmental factors as well as the internally motivated mission factors needed to be well understood. A cross-functional, multi-level team of system engineers and electronics designers were required to properly decompose top level mission requirements into assembly and slice level requirements. Navigating this complex set of challenges proved to be a non-linear course, as the mission, flight system, payloads, and power subsystem were developed in parallel. This resulted in relatively late design changes in the power subsystem. The final, updated, design has passed functional testing and been verified to robustly satisfy the mission requirements. Numerous lessons learned were accrued on the way to this final implementation.
DOI: 10.15468/dl.54m2pb
title: Occurrence Download

description: A dataset containing 108675 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Ranunculus polyanthemos L.)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 108675 records from 742 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015213-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.pyzb2l
title: Initial Checkout of the Psyche Electric Propulsion System after Launch

description: NASA’s Psyche spacecraft launched on October 13, 2023, and soon afterward the mission operations team began spacecraft initial checkout activities. For the electric propulsion system, the feed system and thruster gimbals were first prepared and then the rest of the subsystem completed an initial operations test during thruster bakeout. Thrust for each thruster was measured across the full range of operating powers and was in good agreement with pre-flight expectations. A weeklong test of the spacecraft and mission operations plan during thrusting activities was successful, but a thruster burn-in phenomenon was observed during full power operation that was longer than expected based on previous flight history. Data accumulated during the initial checkout activities shows that this burn-in behavior is different for each thruster, and suggests that it is a result of the thruster discharge transitioning between two different plasma modes that can be mitigated by reducing discharge power and by adjusting the thruster magnet current. At the conclusion of the checkout activities, the subsystem had accumulated 357 hours of thrusting operations while consuming 18.5 kg of propellant, and was fully ready to begin the cruise phase of the mission.
DOI: 10.48577/jpl.imtx7y
title: EcoPro: Ecological Projection Digital Twin

description: EcoPro is a digital twin to perform an ecological projection which is to predict changes in ecosystems in response to environmental drivers. EcoPro provides a platform to access Earth Systems Model (ESM) outputs and Earth Systems observation datasets, to develop an ecological model that connects ecosystem predictors with environmental drivers, to downscale the ESM model outputs to the resolution relevant to the ecosystem, to apply the ecological model to the downscaled ESM model outputs, to visualize the ecological projection results to the high resolution to inform application users and decision makers, and to assess the performance of new observing systems for ecological projection. We present the design and implementation of EcoPro and the scientific use cases we studied with EcoPro.
DOI: 10.48577/jpl.181doz
title: ESTIMATION OF FOREST ABOVEGROUND BIOMASS FROM DERIVATIVES OF VEGETATION-STRUCTURE PROFILES

description: Several studies have found that the vertical Fourier transform of lidar, interferometric SAR, and stereo photogrammetric profiles at empirically-determined spatial frequencies enables high-performance forest aboveground biomass estimation. Linear combinations of real and imaginary parts of Fourier transforms of Tomographic (multi-baseline) SAR (TomoSAR) profiles, from UAVSAR airborne data, generate ~20%-precision estimates of AGB in the Saskatchewan area of Canada. We found that this 20% precision can be improved to ~15%, a factor of 30% improvement in RMSE if, instead of using Fourier transforms of the profile itself, we use Fourier transforms of the spatial, vertical derivative of the profile. The formulation of this “derivative” algorithm is the subject of this paper.
DOI: 10.48577/jpl.uj8gae
title: Uncertainty Quantification on the Orbiting Carbon Observatory-2: Methodology and Evaluation

description: No abstract available.
DOI: 10.48577/jpl.i5dvy8
title: Erosion Mechanisms at the Outer Front Pole Cover of a Magnetically Shielded Hall Thruster

description: Erosion of the outer front pole cover in a magnetically shielded Hall thruster is mostly caused by the high energy ions of the beam. We show in this article that erosion predictions for the outer pole are highly sensitive to small variations in the experimentally informed anomalous collision frequency distribution inside the channel that result in the axial displacement of the stagnation and sonic point of the ions. We produce for all the reported operating conditions numerical solutions using Hall2De that agree well with both laser-induced fluorescence and wear measurements. We also report on the first set of Hall2De simulations that make partial use of first-principles closed-form model for the anomalous collision frequency in the region inside the channel where we found a strong correlation between the erosion predictions and the anomalous collision frequency. Of the two cases shown exhibits good agreement with LIF measurements at the channel centerline and reproduces oscillations, the OFPC erosion rate and off-centerline LIF measurements accurately. This represents a promising first step towards a fully ab initio simulation.
DOI: 10.48577/jpl.bshahh
title: A new semi-empirical model for the extragalactic background light

description: No abstract available.
DOI: 10.48577/jpl.e4lto1
title: Ocean Worlds and the Saturn System 2: Enceladus

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

description: A dataset containing 53 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Sirinopteryx rufivinctata (Walker, 1862)"
 ]
}

 The dataset includes 53 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015216-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wrkn6j
title: Occurrence Download

description: A dataset containing 3084791 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Plantae)",
 "Country is New Zealand",
 "OccurrenceStatus is Present",
 "Year is greater than or equal to 0"
 ]
}

 The dataset includes 3084791 records from 359 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015205-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.zcbl0d
title: Thermal Management and Krypton Performance of the H10 High Power Density Hall Thruster

description: Recent literature has shown a variety of benefits towards Hall thrusters operating at higher thrust and power density, including more efficient ionization with alternate propellants, higher specific impulse capability, higher power throttling ranges, and smaller form factors. These benefits have largely remained untapped due to concerns with thruster lifetime and thruster thermal design exceeding material thermal limits, and so thrusters have been limited in their power density. The H10 Hall thruster was developed at JPL to operate at much higher power densities to realize these benefits, which was achieved by leveraging several of the latest developments in Hall thruster technology and a novel internal geometry. This has resulted in a Hall thruster that operates at 3x the power density of state of the art Hall thrusters, a power throttling ratio of 100:1, and demonstrated specific impulse capability up to 3,400 s. Thermal steady state and performance data is shown for high power operation on xenon, as well as performance on krypton, where temperatures are typically higher than that of xenon. Total efficiency on xenon reached as high as 76% for high voltages, while total efficiency for krypton appeared to peak at high current and low voltage (400 V, 25 A) for the same discharge power to a value of 64%. Several notable oscillation modes were observed to have temperature dependence during these steady-state operations, which are shown with some discussion. To achieve even higher power density, work towards integrating oscillating heat pipes by additively manufacturing them into the magnetic circuit is presented, with preliminary results, where thermal conductivity over 1000 W/mK was measured.
DOI: 10.48577/jpl.usc28p
title: The Journey of the Lunar Flashlight Propulsion System from Launch through End of Mission

description: The Lunar Flashlight Propulsion System (LFPS) was developed as a technology demonstration to enable the Lunar Flashlight spacecraft to reach Lunar orbit and to desaturate onboard reaction wheels. While the system produced over 16 m/s of delta-v and successfully managed momentum, variable thrust performance kept the spacecraft from reaching the Moon. This paper details the in-flight journey of the LFPS, highlighting both successes and challenges met throughout the mission, and providing lessons learned applicable to future CubeSat propulsion systems.
DOI: 10.48577/jpl.qanphy
title: The H10 High Power Density Hall Thruster

description: Magnetic shielding technology has extended the operating life of Hall thrusters to timescales enabling them to expand beyond missions in Earth orbit, which typically require less than 10 kh of operation, to deep-space missions requiring 10-30 kh of operation. While this has expanded potential mission capture, the specific impulse of flight Hall thrusters is still less than 2,000 s, which can limit their use on trajectories requiring velocity change greater than 10 km/s. To expand mission capture further, specific impulses greater than 3,000 s are needed over wide power throttling ratios. Towards those ends, JPL has developed a low-mass, 10-kW class, 3,000 s specific impulse Hall thruster that has demonstrated a 2:1 power throttling ratio at 800 V (~3,000 s specific impulse), efficiencies greater than 50% over 6:1 power throttling, and a 50:1 power throttling ratio over 0.2-10 kW. Thermal steady-state operation reached 15 kW and a maximum operating power of 20 kW was briefly demonstrated. To achieve this performance requires novel approaches that can operate at power densities significantly exceeding the state-of-the-art. High power density operation is achieved in the H10 Hall thruster with an integrated, conducting wall, magnetically shielded discharge chamber assembly combined with a passive, multi-zone heat rejection system. Testing has demonstrated peak performance at 800 V, 10 kW of 457 mN thrust, 3400 s specific impulse, and an efficiency of 76%. The H10 represents a new class of high-power density Hall thrusters, enabling next generation robotic science and human exploration missions.
DOI: 10.15468/dl.fp29jg
title: Occurrence Download

description: A dataset containing 131203 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Polygonatum odoratum (Mill.) Druce)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 131203 records from 983 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015215-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.d8znqj
title: Occurrence Download

description: A dataset containing 344 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Echinocereus arizonicus Rose ex Orcutt"
 ]
}

 The dataset includes 344 records from 18 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0235739-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dwnraa
title: Occurrence Download

description: A dataset containing 5 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Trygonidae",
 "Continent is one of (North America, South America)"
 ]
}

 The dataset includes 5 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014935-230810091245214/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.f86kqk
title: Occurrence Download

description: A dataset containing 50 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Laothoe amurensis Staudinger, 1892",
 "HasCoordinate is true",
 "Country is Japan",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 50 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0210590-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.cwwcq6
title: Occurrence Download

description: A dataset containing 13 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Amphisbaena bakeri Stejneger, 1904"
 ]
}

 The dataset includes 13 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0290150-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.nmra84
title: Occurrence Download

description: A dataset containing 35 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Country is Colombia",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "InstitutionCode is Parques Nacionales Naturales de Colombia (PNN)",
 "TaxonKey is Rodentia",
 "Year 1000-2023"
 ]
}

 The dataset includes 35 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001738-230828120925497/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4mc79z
title: Occurrence Download

description: A dataset containing 60680 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Centaurium pulchellum (Sw.) Druce"
 ]
}

 The dataset includes 60680 records from 747 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0033152-230810091245214/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4x6det
title: Occurrence Download

description: A dataset containing 85 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Aristichthys nobilis (Richardson, 1845)"
 ]
}

 The dataset includes 85 records from 32 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0290160-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.szzdkx
title: Occurrence Download

description: A dataset containing 7731 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Caesalpinia pulcherrima (L.) Sw.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 7731 records from 293 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004029-230828120925497/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.byn7kb
title: Occurrence Download

description: A dataset containing 1757 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Gymnema sylvestre (Retz.) R.Br. ex Sm.",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1757 records from 94 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0038845-231120084113126/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.bfyhy2
title: Occurrence Download

description: A dataset containing 80452 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((110.2578 30.94753,114.08328 30.94753,114.08328 32.71075,110.2578 32.71075,110.2578 30.94753))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 80452 records from 189 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0105637-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mcgf9z
title: Occurrence Download

description: A dataset containing 21 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Loveridgelaps elapoides (Boulenger, 1890)"
 ]
}

 The dataset includes 21 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0290174-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dmbtvj
title: Occurrence Download

description: A dataset containing 358 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is China",
 "TaxonKey is Quercus franchetii Skan"
 ]
}

 The dataset includes 358 records from 21 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0105708-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.x863u9
title: Occurrence Download

description: A dataset containing 51 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((72 25,105 25,105 40,72 40,72 25))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Larvivora ruficeps Hartert & Ejo, 1907"
 ]
}

 The dataset includes 51 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0424088-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.