cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.w65sld
title: Predicting the e ect of surface properties on Enceladus for landing

description: The prospect of landing on the surface of Enceladus comes with the question of whether the surface 4 conditions permit selection and certi cation of one or more safe landing sites in an area of high science 5 value. On Enceladus, life detection is a high science value objective that correlates with proximity to 6 the south polar terrain where the plume deposition rate is highest; however, such areas may be unsafe 7 if unsintered particles make the landing site unstable. To investigate this, the surface of Enceladus 8 is modeled using the level set discrete element method (LS-DEM). This method models the kinetics 9 and kinematics of large groups of individual ice particles both in contact and sintered together. Using 10 the model, a rigid footpad is initialized at a 1m=s descent just above the ice surface under Enceladus 11 gravity. Parameters studied were the sintering amount, particle size distribution, footpad geometry, 12 and surface slope. The model predicts that some sintering is required for the surface to support a 13 lander, however, too much sintering can cause a lander to bounce. Within the bounds tested, the 14 particle size distribution had little impact on the penetration depth. For tests on sloped surfaces it is 15 shown that landing could be possible on slopes as steep as 20 degrees for certain conditions, but it is 16 safest to land in areas with a slope angle of 15 degrees or less. While slope angle and sintering level 17 were much more important than footpad geometry, the hemisphere footpad had the best performance 18 (lowest sliding) in most cases compared to the cone or disk.
DOI: 10.48577/jpl.bu6aev
title: Large active-area superconducting microwire detector array with single-photon sensitivity in the near-infrared

description: Superconducting nanowire single photon detectors (SNSPDs) are the highest performing technology for time-resolved single-photon counting from the UV to the near-infrared. The recent discovery of single-photon sensitivity in micrometer-scale superconducting wires is a promising pathway to explore for large active area devices with application to dark matter searches and fundamental physics experiments. We present 8-pixel 1mm^2 superconducting microwire single photon detectors (SMSPDs) with 1 μm-wide wires fabricated from WSi and MoSi films of various stoichiometries using electron-beam and optical lithography. Devices made from all materials and fabrication techniques show saturated internal detection efficiency at 1064 nm in at least one pixel, and the best performing device made from silicon-rich WSi shows single-photon sensitivity in all 8 pixels and saturated internal detection efficiency in 6/8 pixels. This detector is the largest reported active-area SMSPD or SNSPD with near-IR sensitivity published to date, and the first report of an SMSPD array. By further optimizing the photolithography techniques presented in this work, a viable pathway exists to realize larger devices with cm2-scale active area and beyond.
DOI: 10.48577/jpl.ktv6t8
title: Mid-infrared cross-sections and pseudoline parameters for trans-2-butene (2-C4H8)

description: We measured cross-sections for trans-2-butene (trans-2-C4H8: CH3-CH=CHCH3) in the mid-infrared (800-1533 cm−1) in support of remote sensing of Titan’s atmosphere. Trans-2-butene is one of many C4 hydrocarbons that is predicted to be present in Titan’s atmosphere in detectable abundance, but it has also eluded detection thus far. We collected 20 pure and N2-mixture spectra at temperatures between 180-297 K using a high-resolution Fourier transform spectrometer (Bruker IFS 125 HR) at the Jet Propulsion Laboratory. Spectral resolutions were selected between 0.0039 and 0.062 cm−1, depending on sample pressures. We observed several fundamental modes of vibration and compared their updated band centers against those previously reported in the literature. Our observations span the 800-1533 cm−1 range, which contains multiple vibrational bands and hot band features, and we report temperature-dependent cross-sections in this spectral range. To ensure that our cross-section results are reliable measures of band intensities, we also collected an additional set of 8 room temperature N2-mixture spectra, investigating the linearity between integrated absorbance and optical burden. We fit all of the observed spectra simultaneously to derive a single set of pseudoline parameters, which include intensities and lower-state energies at separate frequency bins, which are considered as pseudoline positions. The pseudolines are observed to be able to reproduce the observed spectra via line-by-line radiative transfer calculations to within a few percent across the spectral region. The pseudoline list is compiled in HITRAN database format, making it readily integrable in existing radiative transfer codes. The absorption cross-sections represented by the pseudolines provide important laboratory input to the search for elusive molecules in future observations with JWST/MIRI or ground-based observatories such as NASA’s Infrared Telescope Facility, as well as in the Cassini/CIRS data archive.
DOI: 10.48577/jpl.td1jeb
title: Earth to Mars: A multiphasic protocol for characterizing permafrost microbes as an analog for extraplanetary exploration

description: Permafrost is important from an exobiology and climate change perspective. It serves as an analog for extraplanetary exploration and it threatens to emit globally significant amounts of greenhouse gases as it thaws due to climate change. Viable microbes survive in Earth’s permafrost, slowly metabolizing and transforming organic matter through geologic time. Ancient permafrost microbial communities represent a crucial resource for gaining novel insights into survival strategies adopted by extremotolerant organisms in extraplanetary analogs. We present a proof-of-concept study on ~22 Kya permafrost to determine the potential for coupling Raman and Fluorescence biosignature detection technology from the NASA Mars Perseverance Rover with microbial community characterization in frozen soils, which could be expanded to other Earth and off-Earth locations. Besides the well-known utility for biosignature detection and identification, our results indicate that spectral mapping of permafrost could be used to rapidly characterize organic carbon characteristics. Coupled with microbial community analyses, this method has the potential to enhance our understanding carbon degradation and emissions in thawing permafrost. Further, spectroscopy can be accomplished in situ to mitigate sample transport challenges and in assessing and prioritizing frozen soils for further investigation. This method has broad-range applicability to understanding microbial communities and their associations with biosignatures and soil carbon and mineralogic characteristics relevant to climate science and astrobiology.
DOI: 10.48577/jpl.m89izz
title: A Mars 2020 Perseverance SuperCam Perspective on the Igneous Nature of the Máaz Formation at Jezero Crater and Link With Séítah, Mars

description: The Máaz formation consists of the first lithologies in Jezero crater analyzed by the Mars 2020Perseverance rover. This formation, investigated from Sols (Martian days) 1 to 201 and from Sols 343 to 382,overlies the Séítah formation (previously described as an olivine-rich cumulate) and was initially suggested torepresent an igneous crater floor unit based on orbital analyses. Using SuperCam data, we conducted a detailedtextural, chemical, and mineralogical analyses of the Máaz formation and the Content member of the Séítahformation. We conclude that the Máaz formation and the Content member are igneous and consist of differentlava flows and/or possibly pyroclastic flows with complex textures, including vesicular and non-vesicular rockswith different grain sizes. The Máaz formation rocks exhibit some of the lowest Mg# (=molar 100 × MgO/MgO + FeO) of all Martian igneous rocks analyzed so far (including meteorites and surface rocks) and showsimilar basaltic to basaltic-andesitic compositions. Their mineralogy is dominated by Fe-rich augite to possiblyferrosilite and plagioclase, and minor phases such as Fe-Ti oxides and Si-rich phases. They show a broaddiversity of both compositions and textures when compared to Martian meteorites and other surface rocks. Thedifferent Máaz and Content lava or pyroclastic flows all originate from the same parental magma and/or thesame magmatic system, but are not petrogenetically linked to the Séítah formation.
DOI: 10.48577/jpl.o3werv
title: Observing inside the coronagraphic regime with optimized single-mode nulling interferometry

description: The number of terrestrial exoplanets accessible to high-contrast coronagraphic imaging with large telescopes is limited by the smallest angular offset from bright stars at which coronagraphs can observe. However, it is possible to reach inside a telescope’s coronagraphic regime by employing nulling interferometry across a telescope’s pupil. Indeed, “cross-aperture” nulling interferometry can observe significantly closer to stars than typical coronagraphs, enabling observations even within the stellar diffraction core. Identifying an optimal nulling coronagraph, i.e., one with both a very small IWA and a high throughput for exoplanet light, would thus be of great interest. A systematic examination of available nulling options has therefore been carried out, which has led to three things. The first is a topological overview that unites both multi-aperture nulling interferometers and single-aperture phase coronagraphs into a common geometrical framework. The second is a new type of phase-mask coronagraph that has emerged from a gap in this framework, called here the “split-ring” coronagraph. The third is a clear identification of the optimal configuration for a nulling coronagraph, which turned out to be an aperture-plane phase knife, i.e., an achromatic -radian phase shift applied to half the telescope pupil prior to focusing the telescope’s point spread function (PSF) into a single-mode fiber. The theoretical peak efficiency of the phase-knife fiber coronagraph, 35.2% for a circular telescope aperture, is found to be almost twice that of the next most efficient case, the vortex fiber nuller, at 19.0%.
DOI: 10.48577/jpl.fw9wqj
title: Trends in 20 years of AIRS data: Indications of climate change?

description: The Atmospheric Infrared Sounder (AIRS) on the EOS Aqua Spacecraft was launched on May 4, 2002, with a 95% confidence design lifetime of 5 years. Since 2002 AIRS has performed exceptionally well. We now have 20 years of AIRS data. We show that key channels from AIRS are more accurate and close to one order of magnitude more stable than the 100 mK absolute and 10 mK/yr required to measure climate trends. However, the real limitation on the usable absolute accuracy and stability at the 100 mK and 10 mK/yr are time varying residual cloud contamination at all wavelength, and surface contamination effects, particularly in the SW channels. Large interannual variabilities due to ENSO type effects further inflate trend uncertainties. The 20 years of AIRS data contain at least two changes of potential climate significance: The change of the daily count of Deep Convective Cloud (DCC) in the tropical oceans, but it is opposite in sign to the expected trend, and a decrease in the count of clear cases, as determined by the Spatial Coherence Test (SCT) . Both indicate unexpected changes in the spatial distribution of clouds on a 45x45 km scale.
DOI: 10.48577/jpl.up6s3x
title: High-contrast demonstration of a vector vortex coronagraph with a segmented, off-axis aperture

description: One of the most profound scientific questions is whether there are other Earth-like worlds. To image such exoplanets directly, the Astro2020 Decadal Survey highly recommends technology development for a future 6-meter, space-based observatory equipped with a coronagraph. The vector vortex coronagraph (VVC) is a top candidate for providing the necessary $10^{-10}$ planet-to-star contrast ratio needed at small angular separations to image and characterize Earth-like exoplanets. The VVC is best suited for an unobscured aperture, but for a 6-meter, space-based observatory the primary mirror may need to be segmented. In this paper, we describe our laboratory experiments testing a charge four VVC with a segmented, off-axis entrance pupil. The extra diffraction from the pupil segmentation was suppressed with the single Boston Micromachines deformable mirror in the optical system. We achieved a mean normalized intensity of $4.7\times10^{-9}$ from $3-10$ $\lambda/D$ in a 10\% spectral bandwidth in the Decadal Survey Testbed at the Jet Propulsion Laboratory. To determine our current limitations and to enable $10^{-10}$ contrast in future tests, we compare to other testbed results with a monolithic aperture.
DOI: 10.48577/jpl.sd9swl
title: ACTIVE TERRAIN RELATIVE NAVIGATION FOR LUNAR LANDINGS

description: Landing on a planetary body is an important part of space exploration. Precision landing capability enables a pin-point touchdown on the planet surface to con- duct scientific exploration. Terrain Relative Navigation (TRN) is an autonomous navigation technique to achieve precision landing. A Camera-based Passive TRN system has been proven successful in the Mars 2020 mission. However for un- illuminated locations, Active TRN is needed to achieve precision landing. In this paper, the performance of a lidar-based Active TRN concept for lunar landing is investigated using numerical simulations and publicly available altimetry data.
DOI: 10.48577/jpl.dkknok
title: Compact Fire Infrared Radiance Spectral Tracker(c-FIRST)

description: No abstract available.
DOI: 10.48577/jpl.big1ar
title: Ingenuity Mars Helicopter

description: No abstract available.
DOI: 10.48577/jpl.xmgeaj
title: Introduction to NASA Physical Oceanography Distributed Active Archive Center (PO.DAAC)

description: No abstract available.
DOI: 10.48577/jpl.irobrm
title: Space Starlight Suppression Technology Demonstration: The Nancy Grace Roman Space Telescope Coronagraph

description: No abstract available.
DOI: 10.48577/jpl.2gijcy
title: Trying to understand the dark stuff

description: No abstract available.
DOI: 10.48577/jpl.336vqz
title: The Science of NASA’s Cold Atom Lab

description: No abstract available.
DOI: 10.48577/jpl.hnduib
title: Development of T2SLS LWIR Focal Plane Arrays for the Hyperspectral Thermal Imager (HyTI)

description: No abstract available.
DOI: 10.48577/jpl.d3ilkg
title: Radiation Effects on Li/CFx primary batteries

description: No abstract available.
DOI: 10.48577/jpl.23j4qh
title: Infrared Focal Plane Assemblies for an All-Sky Spectral Survey

description: No abstract available.
DOI: 10.48577/jpl.pend50
title: Jet Propulsion Laboratory Deep Space SmallSat Capabilities

description: No abstract available.
DOI: 10.48577/jpl.yngpww
title: Remote Sensing of Sea Surface Glacial Meltwater Fraction in the Coastal Ocean Waters of the Antarctic Peninsula

description: No abstract available.
DOI: 10.48577/jpl.giy9hs
title: Heat and Electrical Power for Surviving the Lunar Night: The Chemical Heat Integrated Power Source (CHIPS)

description: No abstract available.
DOI: 10.48577/jpl.8uitbd
title: Systems Integration and Test of the Lunar Flashlight Spacecraft

description: No abstract available.
DOI: 10.48577/jpl.x2lfmy
title: Development of T2SLS LWIR focal plane arrays for the Hyperspectral Thermal Imager (HyTI)

description: No abstract available.
DOI: 10.48577/jpl.tacqcz
title: Geologic Mapping Capability of Italian PRISMA Hyperspectral Data

description: No abstract available.
DOI: 10.48577/jpl.p8n2ad
title: On the Attribution of Ice-thickness Change to Sea-level Change

description: No abstract available.
DOI: 10.48577/jpl.fixibo
title: Ocean Worlds Lander Autonomy Testbed

description: No abstract available.
DOI: 10.48577/jpl.53mv9f
title: Measuring TKID Responsivity with Photon Shot Noise

description: No abstract available.
DOI: 10.48577/jpl.oikdyi
title: Wide Temperature Battery Development for CADRE Autonomous Lunar Rovers

description: No abstract available.
DOI: 10.48577/jpl.hamkik
title: Lunar Night Survivable Architecture for Self-Sufficient Science Payloads

description: No abstract available.
DOI: 10.48577/jpl.hvvbba
title: The Mars Sample Return Campaign

description: No abstract available.
DOI: 10.5067/q0v6dtpzhshv
title: OMPS-NPP L1G LP Radiance EV Wavelength-Altitude Grid swath orbital 3slit V2
DOI: 10.48577/jpl.tecj0e
title: Demonstrating a Model-based Coronagraphic Phase Retrieval for Processing of High-Contrast-Imaging Observations with the James Webb Space Telescope

description: No abstract available.
DOI: 10.5067/yve3fsnj59rq
title: OMPS-NPP L1G LP Radiance EV Wavelength-Altitude Grid swath orbital 3slit V2.6
DOI: 10.48577/jpl.a34zcr
title: Cloud Tomography using Multi-Angle/Multi-Spectral/Multi-Polarization Imaging: From Demonstrations using AirMSPI to Present (MISR+MODIS/Terra) and Future (MAIA, AOS) Space-Based Sensor Exploitation

description: No abstract available.
DOI: 10.48577/jpl.x67hfw
title: Designing a Feedback Loop for Event-Driven Data Sharing Enabled with Kafka Connect and KSQL

description: No abstract available.
DOI: 10.48577/jpl.aenpb0
title: Mars Project Software Systems Engineering Improvements

description: No abstract available.
DOI: 10.48577/jpl.aic7xr
title: Quantum Science in space

description: No abstract available.
DOI: 10.48577/jpl.ltrw2r
title: Investigating Projected Greenland Ice Surface Energy Balance and Surface Mass Balance this Century: Identification and Quantification of Key Model Uncertainties

description: No abstract available.
DOI: 10.48577/jpl.teenhp
title: Operational GRACE-FO Accelerometer Transplant Strategies

description: No abstract available.
DOI: 10.48577/jpl.eebicw
title: Entering the third decade of global mass change satellite observations with GRACE-FO: science mission status and plans

description: No abstract available.
DOI: 10.48577/jpl.3gsukn
title: Near-Simultaneous Observations of XCO2, NO2, and SO2 Over Megacities and Volcanoes From OCO-3 and GEMS

description: No abstract available.
DOI: 10.5519/qd.8pej4fov
title: Query on the Natural History Museum Data Portal (data.nhm.ac.uk) (2 records)
DOI: 10.22003/xfel.eu-data-900324-00
title: DSSC prototype commissioning
DOI: 10.6073/pasta/2bd5214098d104e7e9781d3e55c553e4
title: Fall 2020 plant monitoring survey -- shoot height and flowering status of plants in permanent plots at GCE sampling sites 1-10

description: A quadrat survey was conducted in October 2020 to measure the species and size distribution of plants at 10 GCE LTER sampling sites. The quadrats were established as permanent plots at GCE sampling sites in October 2000 by placing wooden stakes at random locations across two nominal zones at each site, designated based on marsh structure (creekbank and high marsh). New plots were added each year as necessary to replace those lost due to catastrophic wrack disturbance or creek bank erosion. The plots were visually surveyed and the species, shoot height, and flowering status was recorded individually for each shoot over 10 cm in height present in each plot. Observations from plots exhibiting signs of disturbance were noted in a separate data set (PLT-GCEM-1801). This survey will be repeated annually to assess changes in plant distribution and biomass in relation to environmental changes documented by other GCE LTER monitoring efforts.
DOI: 10.6073/pasta/0705d819a1014fb800aac8ee64b45efc
title: Fall 2020 plant monitoring survey -- biomass calculated from shoot height and flowering status of plants in permanent plots at GCE sampling sites 1-10

description: The biomass of plants surveyed in permanent plots at 10 GCE LTER sampling sites in October 2019 was estimated based on allometric relationships between biomass and shoot height and flowering status derived for each site, zone, and species in October 2002 and October 2008. Biomass was calculated for dominant species, including Spartina alterniflora, S. cynosuroides, Juncus roemerianus, and Zizaniopsis miliacea, as well as rarer species including Scirpus spp, Panicum spp. And Typha angustifolia. This data set is based on GCE plant monitoring survey data set PLT-GCEM-2011a, and allometric relationships were based on GCE data sets PLT-GCEM-0211b, PLT-GCEM-0711, and PLT-GCEM-2011.
DOI: 10.6073/pasta/d83d2ebb5e1f5d0f17ac14e4a06a8dfc
title: Fall 2022 grasshopper monitoring -- mid-marsh grasshopper abundance and species diversity at eight GCE LTER sampling sites

description: Grasshopper abundance and species diversity were investigated at eight sampling sites within the Georgia Coastal Ecosystems (GCE) LTER study area in July 2022. Visual surveys were conducted along 8 2m by 10m transects randomly allocated within the mid-marsh zone at each site. All grasshoppers observed within each transect were counted and identified to species, if possible. This survey was conducted as part of the GCE invertebrate monitoring program, and will be performed annually to assess long-term changes in relative species abundances across the GCE study area.
DOI: 10.6073/pasta/c41b8e4eeac1de0e1cdec02d18b374f2
title: North Temperate Lakes LTER: Physical and Chemical Limnology of Lake Kegonsa and Lake Waubesa 1994 - current

description: Physical and chemicals parameters of two Madison-area lakes in the Yahara chain not included as core NTL-LTER study lakes. Parameters include intermittently sampled water temperature, dissolved oxygen, ph, total alkalinity, chloride and sulfate. Nutrient data has been collected since 2015. Number of sites: 2.
DOI: 10.6084/m9.figshare.23902032
title: Test dataset

description: contains test data for testing AMF fungal network analysis provided in the github repository https://github.com/Cocopyth/AMFTravellingWave
DOI: 10.6084/m9.figshare.23902032.v1
title: Untitled Item

description: contains test data for testing AMF fungal network analysis provided in the github repository https://github.com/Cocopyth/AMFTravellingWave
DOI: 10.5517/ccdc.csd.cc23n4rp
title: CCDC 1955782: Experimental Crystal Structure Determination

description: Related Article: Norihisa Hoshino, Syunsaku Tamura, Tomoyuki Akutagawa|2020|Chem.-Eur.J.|26|2610|doi:10.1002/chem.201904553
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc23n4sq
title: CCDC 1955783: Experimental Crystal Structure Determination

description: Related Article: Norihisa Hoshino, Syunsaku Tamura, Tomoyuki Akutagawa|2020|Chem.-Eur.J.|26|2610|doi:10.1002/chem.201904553
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.