cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.qra6qu
title: Spatial analysis and visualization of global data on multi-resolution hexagonal grids

description: In this article, computation for the purpose of spatial visualization is presented in the context of understanding the variability in global environmental processes. Here, we generate synthetic but realistic global data sets and input them into computational algorithms that have a visualization capability; we call this a simulation–visualization system. Visual- ization is key here because the algorithms we are evaluating must respect the spatial structure of the input. We modify, augment, and integrate four existing component technologies: sta- tistical conditional simulation, Discrete Global Grids (DGGs), Array Set Addressing, and a visualization platform for displaying our results on a globe. The internal representation of the data to be visualized is built around the need for efficient storage and computation as well as the need to move up and down resolutions in a mutually consistent way. In effect, we have constructed a Geographic Information System (GIS) that is based on a DGG and has desirable data storage, computation, and visualization capabilities. We provide an exam- ple of how our simulation–visualization system may be used, by evaluating a computational algorithm called Spatial Statistical Data Fusion (SSDF) that was developed for use on big, remote sensing data sets.
DOI: 10.15468/dl.empk6d
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium procerum Schltr."
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170029-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.krxhws
title: The Massive and Distant Clusters of WISE Survey X: Initial Results from a Sunyaev-Zeldovich Eect Study of Massive Galaxy Clusters at z &gt; 1 using MUSTANG2 on the GBT

description: The properties of galaxy clusters as a function of redshift can be utilized as an important cosmological tool. We present initial results from a program of follow-up observations of the Sunyaev-Zeldovich effect (SZE) in high redshift galaxy clusters detected at infrared wavelengths in the Massive and Distant Clusters of \textit{WISE} Survey (MaDCoWS). Using typical on-source integration times of 3--4 hours per cluster, MUSTANG2 on the Green Bank Telescope was able to measure strong detections of SZE decrements and statistically significant masses on 14 out of 16 targets. On the remaining two, weaker (3.7$\sigma$) detections of the SZE signal and strong upper limits on the masses were obtained. In this paper we present masses and pressure profiles of each target and outline the data analysis used to recover these quantities. Of the clusters with strong detections, three show significantly flatter pressure profiles while, from the MUSTANG2 data, five others show signs of disruption at their cores. However, outside of the cores of the clusters, we were unable to detect significant amounts of asymmetry. Finally, there are indications that the relationship between optical richness used by MaDCoWS and SZE-inferred mass may be significantly flatter than indicated in previous studies.
DOI: 10.15468/dl.82gmlt
title: Occurrence Download

description: A dataset containing 3307 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Centaurea solstitialis L.",
 "HasGeospatialIssue is false",
 "HasCoordinate is true"
 ]
}

 The dataset includes 3307 records from 104 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001444-150504100648427/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.tujtch
title: Multi-hour stratospheric flights with the heliotrope solar hot air balloon

description: Standard meteorological balloons can deliver small scientific payloads tothe stratosphere for a few tens of minutes, but achieving multi-hour level flightin this region is more difficult. We have developed a solar-powered hot air balloonnamed the heliotrope that can maintain a nearly constant altitude in theupper troposphere/lower stratosphere as long as the sun is above the horizon.It can accommodate scientific payloads ranging from hundreds of grams toseveral kilograms. The balloon can achieve float altitudes exceeding 24 kmand fly for days in the Arctic summer, although sunset provides a convenientflight termination mechanism at lower latitudes. Two people can build an envelopein about 3.5 hours, and the materials cost about USD $30. The low costand simplicity of the heliotrope enables a class of missions that is generallyout of reach of institutions lacking specialized balloon expertise. Here, wediscuss the design history, construction techniques, trajectory characteristicsand flight prediction of the heliotrope balloon. We conclude with a discussionof the physics of solar hot air balloon flight.
DOI: 10.25549/independent-c69-46274
title: Reports (1-2 of 3) - A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988-11-18

description: Report: A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988 November 18.
DOI: 10.48577/jpl.thfmz0
title: Minimizing Eclipses via Synodic Resonant Orbits with Applications to EQUULEUS and MMX

description: For deep-space missions that remain in the vicinity of a target body, solar eclipses might become a source of major concern due to tight thermal and power budgets. This paper presents a method for minimizing the eclipse duration of periodic trajectories in three-body systems using synodic resonant periodic orbits. Our derivations successfully capture the global eclipse structure of synodic resonant periodic orbits in terms of driving parameters such as the elongation and phase angles. Two-dimensional Eclipse maps are introduced to identify optimal orbit insertion conditions that avoid or minimize eclipse intervals. The validity and applicability of the proposed method is tested in the full-ephemeris model of the Earth-Moon and Mars-Phobos systems, respectively. As a result of these investigations, we propose new science eclipse-minimum trajectories that are under consideration for the upcoming JAXA missions EQUULEUS and MMX.
DOI: 10.15468/dl.pugpfz
title: Occurrence Download

description: A dataset containing 115 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium prostheciglossum Schltr."
 ]
}

 The dataset includes 115 records from 16 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170032-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.y19rwj
title: Analyzing the Diurnal Cycle by Bayesian Interpolation on a Sphere

description: Bayesian interpolation has previously been proposed as an ideal strategy to constructmaps of radio occultation (RO) data, but that proposition did not consider the diurnaldimension of RO data. In this work, the basis functions of Bayesian interpolation areextended into the domain of the diurnal cycle, thus enabling monthly mapping of radiooccultation data in synoptic time and analysis of the atmospheric tides. The basisfunctions are spherical harmonics multiplied by sinusoids in the diurnal cycle up toarbitrary spherical harmonic degree and diurnal cycle harmonic. Bayesian interpolation requires a regularizer to impose smoothness on the fits it produces, thereby preventing the overfitting of data. In this work, a formulation for the regularizer is proposed and the most probable values of the parameters of the regularizer determined. Special care is required when obvious gaps in the sampling of the diurnal cycle are known to occur in order to prevent the false detection of statistically significant high-degree harmonics of the diurnal cycle in the atmosphere. Finally, this work probes the ability of Bayesian interpolation to generate a valid uncertainty analysis of the fit. The post-fit residuals of Bayesian interpolation are dominated not by measurement noise but by unresolved variability in the atmosphere, which is statistically non-uniform across the globe, thus violating the central assumption of Bayesian interpolation. The problem is ameliorated by constructing maps of RO data using Bayesian interpolation that partially resolve the temporal variability of the atmosphere, constructing maps for approximately every three days of RO data.
DOI: 10.15468/dl.sgwfjs
title: Occurrence Download

description: A dataset containing 14 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Limnonectes fragilis (Liu & Hu, 1973)"
 ]
}

 The dataset includes 14 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001444-150811131857512/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.d8x7vt
title: Impact of Cloud Ice Particle Size Uncertainty in A Climate Model and Implications for Future Satellite Missions

description: Ice particle size is pivotal to determining ice cloud radiative effect and precipitating rate. However, there is a lack of accurate ice particle effective radius (Rei) observation on the global scale to constrain its representation in climate models. In support of future mission design, here we present a modeling assessment of the sensitivity of climate simulations to Rei and quantify the impact of the proposed mission concept on reducing the uncertainty in climate sensitivity. We perturb the parameters pertaining to ice fall speed parameter and Rei in radiation scheme, respectively, in NCAR CESM1 model with a slab ocean configuration. The model sensitivity experiments show that a settling velocity increase due to a larger Rei results in a longwave cooling dominating over a shortwave warming, a global mean surface temperature decrease, and precipitation suppression. A similar competition between longwave and shortwave cloud forcing changes also exists when perturbing Rei in the radiation scheme. Linearity generally holds for the climate response for Rei related parameters. When perturbing falling snow particle size (Res) in a similar way, we find much less sensitivity of climate responses. Our quadrupling CO2 experiments with different parameter settings reveal that Rei and Res can account for changes in climate sensitivity significantly from +12.3% to −6.2%. By reducing the uncertainty ranges of Rei and Res from a factor of 2 to ±25%, a future satellite mission under design is expected to improve the climate state simulations and reduce the climate sensitivity uncertainty pertaining to ice particle size by approximately 60%. Our results highlight the importance of better observational constraints on Rei by satellite missions.
DOI: 10.25549/independent-c69-46467
title: City of quartz. "The hammer and the rock", 1990

description: "The hammer and the rock", chapter 5 in Mike Davis. City of quartz. New York, New York: Verso, 1990: pp. 267-322. Includes dustjacket.
DOI: 10.48577/jpl.tfb2bp
title: Trajectory Determination for Coronal Ejecta Observed by WISPR/Parker Solar Probe

description: The Wide-field Imager for Solar Probe (WISPR) on Parker Solar Probe (PSP), observing in white light, has a fixed angular field of view, extending from 13.5◦ to 108◦ from the Sun and approximately 50◦ in the transverse directions. Because of the highly elliptical orbit of PSP, the physical extent of the imaged coronal region varies directly as the distance from the Sun, requiring new techniques for analysis of the motions of observed density features. Here, we present a technique for determining the 3D trajectory of CMEs and other coronal ejecta moving radially at a constant velocity by first tracking the motion in a sequence of images and then applying a curve-fitting procedure to determine the trajectory parameters (distance vs. time, velocity, longitude and latitude). To validate the technique, we have determined the trajectory of two CMEs observed by WISPR that were also observed by another white-light imager. The second viewpoint was used to verify the trajectory results from this new technique and help determine its uncertainty.
DOI: 10.48577/jpl.qghos4
title: Optical Verification Experiments of Sub-Scale Starshades

description: Starshades are a leading technology to enable the detection and characterization of Earth-like exoplanets. In this paper we report on optical experiments of sub-scale starshades that advance critical starlight suppression technologies in preparation for the next generation of space telescopes. These experiments were conducted at the Princeton starshade testbed, an 80 m long enclosure testing 1/1000$^\text{th}$ scale starshades at a flight-like Fresnel number. We demonstrate 10$^{-10}$ contrast at the starshade's inner working angle across 10\% of the visible spectrum, with an average contrast at the IWA of $2.0\times10^{-10}$ and contrast floor of $2\times10^{-11}$. In addition to these high contrast demonstrations, we validate diffraction models to an average accuracy of 15\% through tests of intentionally flawed starshades. Overall, this suite of experiments reveal a deviation from scalar diffraction theory due to light propagating through narrow gaps between petals. We provide a model that accurately captures this effect at contrast levels below $10^{-10}$. The results of these experiments demonstrate that there are no optical impediments to building a starshade that provides sufficient contrast to detect Earth-like exoplanets. This work also sets an upper limit on the effect of unknowns in the diffraction models used to predict starshade performance and set tolerances on the starshade manufacture.
DOI: 10.15468/dl.7jq8ar
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium protractum Dauncey"
 ]
}

 The dataset includes 3 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170035-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/independent-c69-46297
title: Reports (1-2 of 3) - A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988-11-18

description: Report: A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988 November 18.
DOI: 10.48577/jpl.3zzucd
title: Scene Invariants for Quantifying Radiative Transfer Uncertainty

description: Remote imaging spectroscopy investigations typically use Radiative Transfer Models (RTMs) to predict the measured radiance at the sensor given a specific surface and atmospheric state. Discrepancies between RTM model assumptions and physical reality can lead to subtle and systematic errors in remote surface property estimates. We present a statistical approach to quantify these model errors without invoking ground truth measurements. Our approach exploits scene invariants - properties of the environment which are stable over space or time, which can be used to estimate RTM model discrepancies. We describe techniques for discovering these features opportunistically in flight data. We then demonstrate data-driven methods which allow investigators to estimate the aggregate errors due to model discrepancy without having to explicitly identify the mechanisms involved. The resulting distributions can improve the accuracy of retrievals and posterior uncertainty predictions.
DOI: 10.15468/dl.hbdgik
title: Occurrence Download

description: A dataset containing 195 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rhipsalis paradoxa (Salm-Dyck) Salm-Dyck"
 ]
}

 The dataset includes 195 records from 42 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001444-150912100344238/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.hq6e99
title: Balloon Locomotion for Extreme Terrain

description: BALLET (BALloon Locomotion for Extreme Terrain) is a new concept vehicle for robotic surface mobility on planetary bodies with atmospheres. The vehicle is composed of a buoyant balloon with 6 evenly-distributed suspended payload modules each serving as a foot for locomotion over inaccessible rugged terrain. BALLET achieves its benefits through several innovations. While the physics of BALLET will apply on Venus and Mars, the environmental conditions and available component technology limit our consideration to Titan. We describe the concept in detail, its applications for science missions on Titan, mission deployment scenarios, analyses of the concept under varying environmental conditions and simulations of its locomotion. The concept is shown to be feasible and provides a new approach for exploration of rugged lakes, dunes, shorelines and cryovolcanic regions on Titan.
DOI: 10.15468/dl.9pt5vm
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium pseudoaprinum J.J.Sm."
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170038-230224095556074/datasets/export for details.
DOI: 10.48577/jpl.oonqtd
title: Quantifying the impact of aerosol scattering on the retrieval of methane from airborne remote sensing measurements

description: As a greenhouse gas with strong global warming potential, atmospheric methane (CH4) emissions have attracted a great deal of attention. Although remote sensing measurements can provide information about CH4 sources and emissions, accurate retrieval is challenging due to the influence of atmospheric aerosol scattering. In this study, imaging spectroscopic measurements from the Airborne Visible/Infrared Imaging Spectrometer–Next Generation (AVIRIS-NG) in the short-wave infrared are used to compare two retrieval techniques — the traditional Matched Filter (MF) method and the Optimal Estimation (OE) method, which is a popular approach for trace gas retrievals. Using a numerically efficient two-stream-exact-single-scattering radiative transfer model, we also simulate AVIRIS-NG measurements for different scenarios and quantify the impact of aerosol scattering in the two retrieval schemes by including aerosols in the simulations but not in the retrievals. The presence of aerosols causes an underestimation of CH4 in both the MF and OE retrievals; the biases increase with increasing surface albedo and aerosol optical depth (AOD). Aerosol types with high single scattering albedo and low asymmetry parameter (such as water soluble aerosols) induce large biases in the retrieval. When scattering effects are neglected, the MF method exhibits lower fractional retrieval bias compared to the OE method at high CH4 concentrations (2–5 times typical background values), and is suitable for detecting strong CH4 emissions. For an AOD value of 0.3, the fractional biases of the MF retrievals are between 1.3 and 4.5%, while the corresponding values for OE retrievals are in the 2.8–5.6% range. On the other hand, the OE method is an optimal technique for diffuse sources (&lt;1.5 times typical background values), showing up to five times smaller fractional retrieval bias (8.6%) than the MF method (42.6%) for the same AOD scenario. However, when aerosol scattering is significant, the OE method is superior since it provides a means to reduce biases by simultaneously retrieving AOD, surface albedo and CH4. The results indicate that, while the MF method is good for plume detection, the OE method should be employed to quantify CH4 concentrations, especially in the presence of aerosol scattering.
DOI: 10.25549/independent-c69-46247
title: Reports (1-2 of 3) - A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988-11-18

description: Report: A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988 November 18.
DOI: 10.48577/jpl.lxkkyd
title: A Spectral Data Compression (SDCOMP) Radiative Transfer Model for High-Spectral-Resolution Radiation Simulations

description: With the increasing use of satellite and ground-based high spectral resolution (HSR) measurements for weather and climate applications, accurate and efficient radiative transfer (RT) models have become essential for accurate atmospheric retrievals, for instrument calibration, and to provide benchmark RT solutions. This study develops a spectral data compression (SDCOMP) RT model to simulate HSR radiances at the top of the atmosphere in both solar and infrared spectral regions. The SDCOMP approach “compresses” the spectral data in the optical property and radiance domains, utilizing principal component analysis (PCA) twice to alleviate the computational burden. First, an optical-property-based PCA is performed for a given atmospheric scenario (atmospheric, trace gas, and aerosol profiles) to simulate relatively low-spectral-resolution radiances at a small number of representative wavelengths. Second, by using precalculated principal components from an accurate radiance dataset computed for a large number of atmospheric scenarios, a radiance-based PCA is carried out to extend the low-spectral-resolution results to desired HSR results at all wavelengths. This procedure ensures both that individual monochromatic RT calculations are efficiently performed and that the number of such computations is optimized. SDCOMP is approximately three orders of magnitude faster than numerically exact RT calculations. The resulting monochromatic radiance has relative errors less than 0.2% in the solar region and brightness temperature differences less than 0.1K for over 95% of the cases in the infrared region. The efficiency and accuracy of SDCOMP not only make it useful for analysis of HSR measurements, but also hint at the potential for utilizing this model to perform RT simulations in mesoscale numerical weather and general circulation models.
DOI: 10.15468/dl.daddup
title: Occurrence Download

description: A dataset containing 337 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Anopheles quadrimaculatus Say, 1824"
 ]
}

 The dataset includes 337 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001444-150922153815467/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.