cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.bk8svb
title: All-Metal Patch Circular Polarized Fan-Beam Antennas for Potential Europa Lander

description: All metal patch circularly polarized X-band antennas are under development at NASA’s Jet Propulsion Laboratory for a potential Europa Lander. The dual-band antenna is proposed to be used as a secondary telecommunication antenna and the single band antenna is proposed to be used as a communication antenna for the Deorbit,Descent, and Landing (DDL) stage. Both the antennas would establish a Direct-to-Earth (DTE) link without relying on an Orbiter. Antenna arrays with fan-beam radiation have been designed for wide beam circular polarization for longer coverage while surviving the harsh environmental conditions at Europa, including, cryogenic temperature, high radiation and electrostatic discharge (ESD) levels.
DOI: 10.48577/jpl.xybfao
title: Being a Scientist in Astronomy and Planetary Sciences - Past, Prospects Opportunities

description: No abstract available.
DOI: 10.48577/jpl.rlkal4
title: Morphometric Trends and Implications for the1 Formation of Araneiform Clusters

description: Araneiforms are an exotic type of feature exclusive to the Martian south polar terrain which have no known direct Earth analog. The dilation and recession of the seasonal CO2 ice deposit has long been hypothesized to be responsible for their gradual formation. However, high south polar latitude araneiforms have not been observed to form or extend in the present day and it is unclear whether they are growing below the limits of high resolution imagery, or whether they formed in a paleoclimate. Furthermore, it is unclear what physical factors govern the distinct araneiform morphologies, which often appear in discrete ‘clusters’, showing non-random spatial distribition. While qualitative observations of morphology have been reported, there has been a paucity of quantitative measurements of the many physical controls that govern araneiform activity and morphology. Here we present the results of a survey designed to initiate a quantitative morphometric approach to exploring some of the factors which may influence araneiform morphologies. Informed by prior laboratory experimental morphometric observations, we survey distinct clusters within 3 sites in the Martian south polar regions representing unique araneiform morphologies ranging from ‘fat’ to ‘thin’ to starburst’. Using the diameters of their central pits as proxies for their starting vent diameters, we find that the level of branching of these dendritic features appears to be correlated with (i) inferred vent spacing and (ii) inferred vent diameter. We suggest that the individual araneiforms within such distinct clusters may have formed contemporaneously, and that vent geometry reflects at least one control on their distinct morphologies. We surveyed HiRISE and CTX images between lat=-87.521◦N and lon=162.39◦E and lat=-74.7◦N, lon=168.41◦E in order to investigate if there are any trends in araneiform morphology with latitude. For the sites we studied, we find no discernable relationship between morphology and latitude, though we caution that a more extended survey is needed to confirm this observation on the broader scale. Additionally, from this survey, we report six new araneiform morphologies; ‘fan’, ‘linear’, ‘spiky’, ‘segmented’, ‘flowing’ and ‘sunflower’.
DOI: 10.15468/dl.q58apy
title: Occurrence Download

description: A dataset containing 183 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium polycladium Rchb.f."
 ]
}

 The dataset includes 183 records from 14 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170014-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.v8eelo
title: Occurrence Download

description: A dataset containing 1860 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Plethodon yonahlossee Dunn, 1917"
 ]
}

 The dataset includes 1860 records from 36 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001525-150410134957023/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.czyqzt
title: Formulation and demonstration of an extended-3DVAR multi-scale data assimilation system for the SWOT altimetry era

description: A state-of-the-art data assimilation system for a high-resolution model has been developed to address the opportunities and challenges posed by the upcoming Surface Water and Ocean Topography (SWOT) satellite mission. A new ‘extended’ three-dimensional variational data assimilation scheme (extended-3DVAR) is formulated to assimilate observations over a time interval, and integrated using a multi-scale approach (hereafter MSDA). The new MSDA scheme specifically enhances the efficacy of the assimilation of satellite along-track altimetry observations, which are limited by large repeat time intervals. This developed system is computationally highly efficient, and thus can be applied to a very high-resolution model. A crucial consideration of the system is first to assimilate routinely available observations, including satellite altimetry, sea surface temperature (SST) and salinity (SSS) and temperature/salinity vertical profiles, to constrain large scales and large mesoscales. High-resolution (dense) observations and future SWOT measurements can then be effectively and seamlessly assimilated to constrain the smaller scales. Using this system, a reanalysis dataset was produced for the SWOT pre-launch field campaign that took place in the California Current System from September through December, 2019. An evaluation of this system with assimilated and withheld data demonstrates its ability to effectively utilize both routine and campaign observations. These results suggest a promising avenue for data assimilation development in the SWOT altimetry era, which will require the capability to efficiently assimilate large-volume datasets resolving small-scale ocean processes.
DOI: 10.25549/independent-c69-44313
title: Correspondence / memoranda (1 of 2), 1981 - 1991-05-24

description: Correspondence and memoranda in support of the Independent Commission on the Los Angeles Police Department (1 of 2), 1981 - 1991 May 24. PART OF A SERIES: The series relates to the work product of Sibley & Austin, whose staff contributed to the Commission's probe of excessive force allegations brought against the LAPD. Included in the series are memoranda, witness testimonies, interview summaries, copies of officers' background files, after-action summaries and reports, and notes taken by the firm. Materials relate to four major areas of study undertaken by the firm: the Justice for Janitors labor demonstration of 1990, the jail ward of County/USC Medical Center, Los Angeles city jails, and a review of the LAPD's Background Investigation Unit.
DOI: 10.48577/jpl.hp66u7
title: Shape from Spectra

description: We introduce a new unified atmospheric-topographic correction approach that estimates surface geometry directly from the radiance measurement. Surface topography influences the at-sensor radiance measurement, making precise topography modeling critical in applications like vegetation or snow studies in mountainous terrain. Currently, elevation maps are used to derive topographic variables such as the slope and sky-view factor. This process is error-prone since static global digital elevation models do not generally achieve the accuracy required, and even minor mismatches in spatial resolution can introduce significant artifacts in downstream processing. Here we demonstrate that it is possible to estimate topographic parameters directly from spectral data, ensuring perfect physical consistency, temporal coincidence, and spatial alignment. We present experiments estimating topographic slope in two scenes in Southern California, with data from NASA’s Next Generation Airborne Visible/Near Infrared Imaging Spectrometer (AVIRIS-NG). We Preprint submitted to Remote Sensing of Environment February 2, 2023 compared our radiance-based estimates against high-resolution lidar datasets. Our initial validation result showed a correlation of R2 = 0.864 (n = 160) over the homogeneous surface of Beckman Auditorium’s cone-shaped roof on the Caltech campus in Pasadena, California. We then validate the model over a larger study site near Santa Clarita, California, finding R2 = 0.92327 (n = 40, 000) in a 350 × 350 m area. The accuracy of our model estimates, combined with its systematic advantages over the alternative, show the potential of the approach for use in both airborne campaigns and orbital missions.
DOI: 10.48577/jpl.ef5ie7
title: The coupling between tropical meteorology, aerosol lifecycle, convection, and radiation, during the Clouds, Aerosol and Monsoon Processes Philippines Experiment (CAMP2Ex)

description: The NASA Cloud, Aerosol, and Monsoon Processes Philippines Experiment (CAMP2Ex) employed the NASA P-3, Stratton Park Engineering Company (SPEC) Learjet 35, and a host of satellites and surface sensors to characterize the coupling of aerosol processes, cloud physics, and atmospheric radiation within the Maritime Continent’s complex southwest monsoonal environment. Conducted in the late summer of 2019 from Luzon Philippines in conjunction with the Office of Naval Research Propagation of Intraseasonal Tropical OscillatioNs (PISTON) experiment with its R/V Sally Ride stationed in the North Western Tropical Pacific, CAMP2Ex documented diverse biomass burning, industrial and natural aerosol populations and their interactions with small to congestus convection. The 2019 season exhibited El Nino and associated drought, high biomass burning emissions, and an early monsoon transition allowing for observation of pristine to massively polluted environments as they advected through intricate diurnal mesoscale and radiative environments into the monsoonal trough. CAMP2Ex’s preliminary results indicate 1) increasing aerosol loadings tend to invigorate congestus convection in height and increase liquid water paths; 2) lidar, polarimetry, and rapid scan geostationary have skill in quantifying diverse aerosol and cloud properties as well as their interaction; and 3) high resolution remote sensing technologies are able to greatly improve out our ability to evaluate the radiation budget in complex cloud systems. Through the development of innovative informatics technologies, CAMP2Ex provides a benchmark dataset of an environment of extremes for the study of aerosol, cloud and radiation processes as well as a crucible for the design of future observing systems.
DOI: 10.48577/jpl.9lpdzr
title: Current and Future Challenges with Large Satellite Antennas at JPL

description: The Mesa antenna measurement facility at Jet Propulsion Laboratory (JPL) has a history going back to the early 1960’s. This location was chosen due to the actual topology being a mesa overlooking the JPL campus, which provides advantages for antenna testing. Back then, all measurements were Far Field (FF), and with lesser computational power than what’s available today, some antenna parameters were empirically optimized by real time adjustments (feed position for example) and the relatively quick feedback from Far Field pattern cuts. Some of these projects operated above 100 GHz, but most were at or below Ka-band. Over time, as Near Field (NF) processing developed and NF range hardware matured, our antenna designs started being tested in NF chambers indoor as opposed to the FF ranges outdoor. The first NF chamber on the JPL Mesa was a totally custom-conversion from an indoor 40 ft FF range, which became a cylindrical NF chamber, optimized for the long and narrow antenna elements used for NSCAT, after being used as a plane-polar NF scanner for the Galileo antenna. This chamber has served faithfully through many projects, including CloudSat [1] (see Fig. 1), that operated at W-band (this was a custom arrangement, the electronics of which have since been removed). Note that this NF chamber, and the one cited below, support conventional NF data acquisition and processing. This NF range was also used to measure 1:10 scale models at Ku-band for both AQUARIUS and SMAP [2,3] with excellent results, when compared with predictions calculated with TICRA GRASP and Ansys HFSS.
DOI: 10.25549/independent-c69-44375
title: Correspondence, 1990 - 1991 June 10

description: Collection of material including: photocopy of handwritten reports, memos re excessive force complaint, interviews, statistical information on allegations and complaints against police officer, etc. Outline. Collection of material including: memos regarding police discipline, special investigations division information, LA Daily Journal article, etc., 1990 - 1991 June 10. PART OF A SERIES: To better understand how LAPD management reacts to problem officers, Skadden, Arps, Slate, Meagher & Flom examined the Department's procedures regarding the identification, documentation, and response to personnel complaints. The series includes memoranda and correspondence; attorney notes; materials related to the firm's administrative capacities, including staff rosters and work plans; flow charts that illustrate the LAPD's structure and organization; and draft copies of the firm's contributions to the Commission report.
DOI: 10.15468/dl.gzgkdc
title: Occurrence Download

description: A dataset containing 30 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium albiflorum Ridl."
 ]
}

 The dataset includes 30 records from 12 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170022-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.qshfi6
title: Revisiting the Land-Ocean Contrasts in Deep Convective Cloud Intensity Using Global Satellite Observations

description: Tropical convection tends to be more intense over land than ocean, but why? Numerous previous studies have investigated the causes of this difference. This paper revisits this question using CloudSat data and focuses on interconnecting various environmental parameters and cloud properties, which have often been examined in a piecemeal way in the past. Our analysis shows that if convection is treated as a process by which potential energy (convective available potential energy) is converted to kinetic energy (vertical velocity), then the conversion is more efficient over land than ocean. A key factor that affects this conversion efficiency is the lifting condensation level (LCL). Higher LCLs over land give rise to broader dry boundary layer thermals that transition to wider deep convective cores. Wider cores, in turn, are better protected from the dilution by entrainment, thus leading to stronger updrafts. This study highlights the importance of the dry stage of convection.
DOI: 10.15468/dl.sxri2w
title: Occurrence Download

description: A dataset containing 1178 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Spain",
 {
 "or" : [
 "TaxonKey is Apium bermejoi L.Llorens",
 "TaxonKey is Argyranthemum lidii Humphries",
 "TaxonKey is Argyranthemum sundingii L.Borgen",
 "TaxonKey is Asparagus fallax Svent.",
 "TaxonKey is Carduncellus dianius Webb",
 "TaxonKey is Centaurea avilae Pau",
 "TaxonKey is Centaurea boissieri subsp. spachii (Sch.Bip. ex Willk.) Dostál",
 "TaxonKey is Centaurea lagascae Nyman",
 "TaxonKey is Centaurea borjae Valdés Berm. & Rivas Goday",
 "TaxonKey is Cheirolophus duranii (Burchard) Holub",
 "TaxonKey is Cheirolophus falcisectus Svent. ex Montelongo & Moraleda",
 "TaxonKey is Cheirolophus metlesicsii Montelongo",
 "TaxonKey is Cheirolophus santos-abreui A.Santos",
 "TaxonKey is Cheirolophus sventenii subsp. gracilis A.Santos",
 "TaxonKey is Cistus chinamadensis Bañares & P.Romero",
 "TaxonKey is Cistus heterophyllus Desf.",
 "TaxonKey is Convolvulus subauriculatus (Burchard) Linding",
 "TaxonKey is Daphne rodriguezii Texidor",
 "TaxonKey is Dianthus rupicola Biv.",
 "TaxonKey is Diplotaxis ibicensis (Pau) Gómez-Campo",
 "TaxonKey is Dorycnium spectabile (Choisy ex Ser.) Webb & Berthel.",
 "TaxonKey is Euphorbia lambii Svent.",
 "TaxonKey is Euphorbia margalidiana Kuhbier & Lewej.",
 "TaxonKey is Genista dorycnifolia Font Quer",
 "TaxonKey is Globularia sarcophylla Svent."
 ]
 }
 ]
}

 The dataset includes 1178 records from 52 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001525-150721130643939/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.grokw1
title: Effects of forest degradation classification on the uncertainty of aboveground carbon estimates in the Amazon

description: Background: Tropical forests are critical for the global carbon budget, yet they have been threatened by deforestation and forest degradation by fire, selective logging, and fragmentation. Existing uncertainties on land cover classification and in biomass estimates hinder accurate attribution of carbon emissions to specific land covers. In this study, we used textural metrics derived from PlanetScope images to implement a probabilistic classification framework to identify intact, logged and burned forests in three Amazonian sites. We also estimated biomass for these forest classes using airborne lidar and compared biomass uncertainties using the lidar-derived estimates only to biomass uncertainties considering the land cover classification as well. Results: Our classification approach reached overall accuracy of 0.86, with accuracy at individual sites varying from 0.69 to 0.93. Logged forests showed variable biomass changes, while burned forests showed an average carbon loss of 35%. We found that including uncertainty in forest degradation classification significantly increased uncertainty and decreased estimates of mean carbon density in two of the three test sites. Conclusions: Our findings indicate that the attribution of biomass changes to forest degradation types needs to account for the uncertainty in land cover classification. By combining very high-resolution images with lidar data, we could attribute carbon stock changes to specific pathways of forest degradation. This approach also allows quantifying uncertainties of carbon emissions associated with forest degradation through logging and fire. Both the attribution and uncertainty quantification provide critical information for national greenhouse gas inventories.
DOI: 10.25549/independent-c69-44607
title: Correspondence, 1976 - 1991 May 7

description: Civilian review of the police: a national survey of the 50 largest cities, 1991 by Samuel Walker and Vic W. Bumphus. Collection of material including: Independent Commission materials for Commission sessions and interview summaries of LAPD officers, testimony of Captain Jan Carlson, materials for Commission sessions, etc., 1976 - 1991 May 7. PART OF A SERIES: To better understand how LAPD management reacts to problem officers, Skadden, Arps, Slate, Meagher & Flom examined the Department's procedures regarding the identification, documentation, and response to personnel complaints. The series includes memoranda and correspondence; attorney notes; materials related to the firm's administrative capacities, including staff rosters and work plans; flow charts that illustrate the LAPD's structure and organization; and draft copies of the firm's contributions to the Commission report.
DOI: 10.48577/jpl.xehnu3
title: Nondestructive quantification of single crystal elasticity in additively manufactured polycrystals

description: Resonant ultrasound spectroscopy (RUS) is capable of determining the single crystal elastic constants from polycrystalline specimens with known crystallographic texture. However, the calculated single crystal elastic constants vary with the measured texture, resulting in inconsistent estimates for additively manufactured (AM) specimens with heterogenous texture regions. In this work, the accuracy of the determined single crystal elastic constants is improved by incorporating the uncertainty of the texture in the determination of single crystal elasticity and requiring only small quantities of electron backscatter diffraction data (EBSD) to do so. The single crystal elastic constants are determined by Bayesian inference with parallelized sequential Monte Carlo (SMC), enabling an order of magnitude reduction in computational cost. AM specimens of a cobalt-nickel-base superalloy (SB-CoNi-10C) demonstrate that the incorporation of texture variability enables the single crystal elastic constants to converge to the reported literature values within one standard deviation, avoiding any dependence on the initial texture values. The single crystal elastic constants of nickel-base-superalloy Inconel 625 (IN625) and Ti-6Al-4V (Ti64) are determined from AM specimens, using only RUS and EBSD data. The determined single crystal elastic constants of IN625 agree between two different texture conditions (induced by AM raster strategy), as well as with the literature values, within one standard deviation. The single crystal elastic constants determined from three AM Ti64 specimens, printed with different beam powers, agree with the range of literature values within two standard deviations but demonstrate variability between AM specimens, indicating that the frequencies may be susceptible to the effects of secondary phases.
DOI: 10.48577/jpl.1kyqqc
title: Draft Genome Sequence of Spacecraft Associated Microbes Isolated from 6 NASA missions (Viking, Mars Pathfinder, Mars Odyssey, MER, Phoenix, and MSL)

description: Whole-genome sequencing can be used to better understand and assess functional abilities of microorganisms isolated from spacecraft hardware and associated surfaces for planetary protection purposes. We sequenced 190 isolates from 6 spaceflight missions with PP requirements and identified them using Illumina-based sequencing, 16S rRNA, MALDI-TOF MS and GTDB-Tk.
DOI: 10.15468/dl.s2rj9j
title: Occurrence Download

description: A dataset containing 90 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium polysema Schltr."
 ]
}

 The dataset includes 90 records from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170017-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.