cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.rl3ly6
title: Conflict- and Fairness-Directed Heuristic Search Scheduling for NASA’s Oversubscribed Deep Space Network

description: This paper describes a comparison of search methods applied to the same problem of scheduling activities for NASA’s Deep Space Network (DSN). The DSN consists of large (34- and 70-meter) radio antennas at three sites around the world, and provides communications and navigation support for dozens of space missions. The DSN is over- subscribed – more time is requested than can be accommodated – and it is an ongoing challenge to schedule the available resources while also balancing the satisfaction of requests from the disparate set of users. As part of a study of state-of-the- art solution techniques for oversubscribed scheduling, a standard set of problems was defined, and solutions were attempted with several classes of algorithms developed by different teams. These included variants of Quantum Annealing (QA), Mixed-Integer Linear Programming (MILP), Reinforcement Learning (RL), and Constraint Satisfaction Problem (CSP) based heuristic search (CSP-HS). The results, first reported in this work, show that heuristic search significantly outperforms the other methods in the study in terms of solution quality and runtime performance, when objectives are to maximize the “fairness” of the resulting schedule (e.g. no starvation) while simultaneously clearing all constraint violations and fitting as much as possible into the schedule. The set of benchmark problems is made openly available for other groups to try.
DOI: 10.48577/jpl.m2zpa1
title: A Sampling Based Approach to Robust Planning for a Planetary Lander

description: Planning for autonomous operation in unknown environments poses a number of technical challenges. The agent must ensure robustness to unknown phenomena, un- predictable variation in execution, and uncertain resources, all while maximizing its objective. These challenges are ex- acerbated in the context of space missions where uncertainty is often higher, long communication delays necessitate robust autonomous execution, and severely constrained computational resources limit the scope of planning techniques that can be used. We examine this problem in the context of a Europa Lander concept mission where an autonomous lander must collect valuable data and communicate that data back to Earth. We model the problem as a hierarchical task network, framing it as a utility maximization problem constrained by a strictly monotonically decreasing energy resource. We propose a novel deterministic planning framework that uses periodic replanning and sampling-based optimization to better handle model uncertainty and execution variation, while remaining computationally tractable. We demonstrate the efficacy of our framework through simulations of a Europa Lander concept mission in which our approach outperforms several baselines in utility maximization and robustness
DOI: 10.48577/jpl.xctykw
title: Exep: ExoEarth yield provided by an 8m off-axis segmented telescope equipped with an adaptive optics system

description: The Astro2020 decadal survey recommended a ∼6m IR/O/UV telescope equipped with a coronagraph instrumentto directly image exoEarths in the habitable zone of their host star. A telescope of such size may need to besegmented to be folded and then carried in current launch vehicles. However, a segmented primary mirrorintroduces the potential for mid spatial frequency optical wavefront instabilities during the science operationsthat would degrade the coronagraph performance. A coronagraph instrument with a wavefront sensing andcontrol (WS&C) system can stabilize the wavefront with a picometer precision at high temporal frequencies(&gt;1Hz). In this work, we study a realistic set of aberrations based on a finite element model of a slightly bigger(8m circumscribed, 6.7m inscribed diameter) segmented telescope with its payload. We model an adaptive optics(AO) system numerically to compute the post-AO residuals. The residuals then feed an end-to-end model ofa vortex coronagraph instrument. The long exposure contrast thus obtained is finally used in an exoEarthcandidate yield calculator to understand the overall benefits of the adaptive optics system in the flagship missionsuccess.
DOI: 10.48577/jpl.isouap
title: Improving VLT/SPHERE without additional hardware: First on-sky correction of quasi-static aberrations using the dark hole technique

description: Direct imaging is the primary technique currently used to detect young and warm exoplanets and understandtheir formation scenarios. The extreme flux ratio between an exoplanet and its host star requires the use ofcoronagraphs to attenuate the starlight and create high contrast images. However, their performance is limitedby wavefront aberrations that cause stellar photons to leak through the coronagraph and on to the science detectorpreventing the observation of fainter extrasolar companions. The VLT/SPHERE instrument takes advantage ofits efficient adaptive optics system to minimize dynamical aberrations to improve the image contrast. In goodseeing conditions, the performance is limited by quasi-static aberrations caused by slowly varying aberrationsand manufacturing defects in the optical components. The mitigation of these aberrations requires additionalwavefront sensing and control algorithms to enhance the contrast performance of SPHERE. Dark hole algorithmsinitially developed for space-based application and recently performed on SPHERE calibration unit have shownsignificant improvement in contrast. This work presents a status update of dark hole algorithms applied onSPHERE and the results obtained during the on-sky tests performed on February 15th and March 15th 2022.
DOI: 10.48577/jpl.brfzxd
title: Comparing Images of ICRF Sources at X, K, and Q-band

description: We have undertaken an exploratory Q-band (43 GHz) imaging-astrometry project targeting the K- band ICRF sources in three sessions each of 24 hours using the Very Long Baseline Array. The project’s goal is to compare images and astrometry from X, K, and Q- bands in order to study the optimal frequency band for CRF observations. The sources were observed as close as possible in time, typically within a week, in order to minimize temporal variations in source structure. We will show how source structure compares between all three bands, and the interplay between source structure, resolution, and astrometry. We hope to use the results from our campaign to determine if pursuit of a Q-band CRF is worthwhile.
DOI: 10.48577/jpl.2on0q6
title: Mars Project Software Systems Engineering Improvements

description: Increasingly challenging missions are characterizedby an expansion of the mission-critical role of software. In theMars projects, Entry, Descent, and Landing (EDL) are softwarecontrolled. EDL relies on software timing and functionality,leading to such things as second chance flight software operatingas a copilot on the backup flight computer. Therefore, much ofthe project risk lies in robustness of software. Within thelaboratory, the Project Software Systems Engineering (PSSE)has the responsibility of planning, systems engineering, andoverseeing all project software while development organizationsdeliver domain specific software, such as Command & DataHandling (C&DH) software, Sample Recovery Helicopter(SRH), Guidance, Navigation, & Control (GN&C) software,Vision Compute Element (VCE) software, Ground Data System(GDS) software, Simulation Support Equipment (SSE)software, etc. The software lifecycle chosen for Mars projectsoftware development is the incremental lifecycle, wherein thecontent and scope of each software release will be built upon thedelivered capabilities of previous releases to achieveincremental functionality. In this context, the challenge stemsfrom the surge in detail and complexity where current softwaresystems engineering practices will be hard-pressed to keep up.This paper describes an assessment of software systemsengineering processes, specifically in the NASA Mars ScienceLaboratory Curiosity Rover, Mars2020 Perseverance Rover,and Mars Sample Retrieval Lander, and identifies potentialefficiencies and improvements. It also describes the innovationsin Mars project software systems engineering and makesrecommendations as to how these evolved and what newmethods and techniques should be infused into flight projects atthe laboratory.
DOI: 10.48577/jpl.sbobn1
title: Near-Term Strategies to Rendezvous with an Interstellar Object

description: Interstellar Objects (ISOs) offer a unique opportunity to answer fundamental questions about the nature of objects that originate outside our solar system. Only two members of this new class of mission target have been identified: asteroid 1I/`Oumuamua in 2017 and comet 2I/Borisov in 2019. Many more are expected to be found with the introduction of the Vera C. Rubin Observatory motivating the formulation of mission concepts to investigate future ISOs. While fast flyby missions are technically feasible today, rendezvous missions that orbit or even land offer the only means for literal ground truth into the nature of these objects. Mission design and propulsion capability are current challenges due to the brevity of ISO paths through the Solar System. These challenges may be overcome with a trade space of detection capabilities, launch vehicles, trajectory designs, and near-term spacecraft technology development. In particular, the combination of Jupiter gravity assist and nuclear electric propulsion provides the highest likelihood of delivering a spacecraft to match the orbit of an ISO.
DOI: 10.48577/jpl.oa7xyh
title: Development of T2SLS LWIR focal plane arrays for the hyperspectral thermal imager (HyTI)

description: In this paper, we will report our recent efforts in achieving high performance in Antimonides type-II strained layer superlattice (T2SLS) based infrared photodetectors using the barrier infrared detector (BIRD) architecture. The high operating temperature (HOT) BIRD focal plane arrays (FPAs) offer the same high performance, uniformity, operability, manufacturability, and affordability advantages as InSb. However, mid-wavelength infrared (MWIR) HOT-BIRD FPAs can operate at significantly higher temperatures (&gt;150K) than InSb FPAs (typically 80K). Moreover, while InSb has a fixed cutoff wavelength (~5.4 µm), the HOT-BIRD offers a continuous adjustable cutoff wavelength, ranging from ~4 µm to &gt;15 µm, and is therefore also suitable for long wavelength infrared (LWIR) as well. The LWIR detectors based on the BIRD architecture has also demonstrated significant operating temperature advantages over those based on traditional p-n junction designs. Two 6U SmalSat mission HyTI (Hyperspectral Thermal Imager) are based on JPL’s T2SLS BIRD FPAs. Based on III-V compound semiconductors, the BIRD FPAs offer a breakthrough solution for the realization of low cost (high yield), high-performance FPAs with excellent uniformity and pixel-to-pixel operability.
DOI: 10.48577/jpl.sjin6o
title: SPHERExLabTools (SLT): A Python Data Acquisition System for SPHEREx Characterization and Calibration

description: Selected as the next NASA Medium Class Explorer mission, SPHEREx, the Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer is planned for launch in early 2025. SPHEREx calibration data products include detector spectral response, non-linearity, persistence, and telescope focus error measurements. To produce these calibration products, we have developed a dedicated data acquisition and instrument control system, SPHERExLabTools (SLT). SLT implements driver-level software for control of all testbed instrumentation, graphical interfaces for manual control of instruments and automated measurements, real-time data visualization, processing, and data archival tools for a variety of output file formats. This work outlines the architecture of the SPHERExLabTools software and presents initial calibration products acquired while using the system.
DOI: 10.48577/jpl.0bnbfi
title: Radiated Electric and Magnetic Field Emissions Shielding Mitigations

description: No abstract available.
DOI: 10.48577/jpl.8mfyga
title: SFFS AM Spring Presentation

description: No abstract available.
DOI: 10.48577/jpl.oxzigm
title: The JPL 2022d X/Ka Celestial Reference Frame

description: No abstract available.
DOI: 10.48577/jpl.zkhcak
title: ExEP Planets from Future Direct Imaging Missions: Determining Masses and Orbits

description: No abstract available.
DOI: 10.48577/jpl.h1z6fh
title: THE ELECTROJET ZEEMAN IMAGING EXPLORER (EZIE) MISSION AND THE MICROWAVE ELECTROJET MAGNETOGRAM (MEM) RADIOMETER INSTRUMENT

description: No abstract available.
DOI: 10.48577/jpl.bq4mnu
title: Aerospace Industrial Needs For AM Research and Development

description: No abstract available.
DOI: 10.48577/jpl.gn3biv
title: Kernel Flows Emulation for NASA's Surface Biology and Geology Mission

description: No abstract available.
DOI: 10.48577/jpl.0xa4x8
title: Europa Simulants Development

description: No abstract available.
DOI: 10.48577/jpl.wyndfb
title: NASA Johnson Space Center (JSC) Commercial Lunar Payload Services (CLPS) EMC Seminar

description: No abstract available.
DOI: 10.48577/jpl.akdelv
title: ACTIVE TERRAIN RELATIVE NAVIGATION FOR LUNAR LANDINGS

description: No abstract available.
DOI: 10.48577/jpl.hmibk4
title: TOLIMAN: Searching for earth analogs around the nearest star system

description: No abstract available.
DOI: 10.48577/jpl.z3oocj
title: Deriving Event Thresholds and Collision Probability for Automated Conjunction Assessment at Mars and the Moon

description: No abstract available.
DOI: 10.48577/jpl.hqkm3t
title: Design and Implementation of the Juno Eclipse Avoidance Maneuver

description: No abstract available.
DOI: 10.48577/jpl.4q1wyt
title: MAIA background slides for EJ focus session

description: No abstract available.
DOI: 10.48577/jpl.ij6zuv
title: NASA's Next Astrophysics Flagship: The Nancy Grace Roman Space Telescope

description: No abstract available.
DOI: 10.48577/jpl.6zhzel
title: Current and Future Perspectives in Monitoring Continental Surface Waters from Space

description: No abstract available.
DOI: 10.48577/jpl.qqn7r6
title: Wind mechanical forcing of the oceans: A modeling study in anticipation of future space missions

description: No abstract available.
DOI: 10.48577/jpl.rqoxyg
title: NASA Advanced Multi-Mission Operations System (AMMOS) Mission Control Products

description: No abstract available.
DOI: 10.48577/jpl.knthpl
title: JWST to future IROUV mission

description: No abstract available.
DOI: 10.48577/jpl.pthfky
title: Design of the Juno Extended Mission Trajectory

description: No abstract available.
DOI: 10.48577/jpl.nerp6k
title: Juno Orbit Determination and Maneuver Operations: Early Orbit Phase through End of Prime Mission

description: No abstract available.
DOI: 10.48577/jpl.eeg59b
title: Orbit Determination Performance of theEclipse Avoidance Maneuver by the Juno Spacecraft

description: No abstract available.
DOI: 10.48577/jpl.n0s1bs
title: X-ray Energy Dependence of Beam Diameter Produced by Polycapillary X-ray Optics

description: No abstract available.
DOI: 10.48577/jpl.7dvcru
title: Orbit Determination Performance of theGanymede Flybys by the Juno Spacecraft

description: No abstract available.
DOI: 10.48577/jpl.7gy4dx
title: SmallSat Presentation: Developing Lunar Flashlight and Near-Earth Asteroid Scout Flight Software Concurrently using Open-Source F Prime Flight Software Framework

description: No abstract available.
DOI: 10.48577/jpl.9zujls
title: Fundamental Physics

description: No abstract available.
DOI: 10.48577/jpl.3l5x6w
title: High Voltage Power Systems for Space Applications

description: No abstract available.
DOI: 10.6084/m9.figshare.7454018
title: Geochemistry and provenance of the Turquoise Bluff Slate, northeastern Tasmania: tectonic significance

description: The Ordovician Turquoise Bluff Slate in northeastern Tasmania is a 2 km-thick sequence of deep-marine siliceous black slates. It is dominated by meta-siltstones with bimodal grainsize distributions typical of turbidite T<sub>E-1</sub> and T<sub>E-2</sub> facies. The slates have high SiO<sub>2</sub> indicating they are hemipelagites. The high Ba and V indicate they were deposited in an anoxic environment associated with high oceanic productivity. All these features are common in muddy turbidites. U–Th–Pb dating of detrital monazite and authigenic xenotime in the slates supports previous evidence that the dominant cleavage, in this unit, formed during the Benambran Orogeny. The whole-rock composition of the slates is similar to black slates in the Adaminaby Group, NSW. A review of Paleozoic whole-rock compositions from the Lachlan Orogen confirms they all have trace element contents similar to average Australian shale. However, there are subtle differences in composition. The Turquoise Bluff Slate and other Mathinna Supergroup rocks from the Eastern Tasmania Terrane have higher average Cr content than similar age turbidites from Victoria and NSW. This probably reflects a small contribution from Tasmania Cambrian ultramafic rocks in the provenance. If this were correct, northeastern Tasmania was closer to western Tasmania in the Paleozoic than other provinces of the Lachlan Orogen, southeastern Australia. Other subtle features of the whole-rock composition of Paleozoic sedimentary rocks from the Lachlan Orogen indicate it may be possible to recognise provincial variations in composition that will provide new constraints on tectonic models of southeastern Australia.
DOI: 10.48577/jpl.qmrsvl
title: 2022-0808_AAS22-708_upload

description: No abstract available.
DOI: 10.6084/m9.figshare.7454018.v2
title: Geochemistry and provenance of the Turquoise Bluff Slate, northeastern Tasmania: tectonic significance

description: The Ordovician Turquoise Bluff Slate in northeastern Tasmania is a 2 km-thick sequence of deep-marine siliceous black slates. It is dominated by meta-siltstones with bimodal grainsize distributions typical of turbidite T<sub>E-1</sub> and T<sub>E-2</sub> facies. The slates have high SiO<sub>2</sub> indicating they are hemipelagites. The high Ba and V indicate they were deposited in an anoxic environment associated with high oceanic productivity. All these features are common in muddy turbidites. U–Th–Pb dating of detrital monazite and authigenic xenotime in the slates supports previous evidence that the dominant cleavage, in this unit, formed during the Benambran Orogeny. The whole-rock composition of the slates is similar to black slates in the Adaminaby Group, NSW. A review of Paleozoic whole-rock compositions from the Lachlan Orogen confirms they all have trace element contents similar to average Australian shale. However, there are subtle differences in composition. The Turquoise Bluff Slate and other Mathinna Supergroup rocks from the Eastern Tasmania Terrane have higher average Cr content than similar age turbidites from Victoria and NSW. This probably reflects a small contribution from Tasmania Cambrian ultramafic rocks in the provenance. If this were correct, northeastern Tasmania was closer to western Tasmania in the Paleozoic than other provinces of the Lachlan Orogen, southeastern Australia. Other subtle features of the whole-rock composition of Paleozoic sedimentary rocks from the Lachlan Orogen indicate it may be possible to recognise provincial variations in composition that will provide new constraints on tectonic models of southeastern Australia.
DOI: 10.6084/m9.figshare.7454018.v1
title: Geochemistry and provenance of the Turquoise Bluff Slate, northeastern Tasmania: tectonic significance

description: The Ordovician Turquoise Bluff Slate in northeastern Tasmania is a 2 km-thick sequence of deep-marine siliceous black slates. It is dominated by meta-siltstones with bimodal grainsize distributions typical of turbidite T<sub>E-1</sub> and T<sub>E-2</sub> facies. The slates have high SiO<sub>2</sub> indicating they are hemipelagites. The high Ba and V indicate they were deposited in an anoxic environment associated with high oceanic productivity. All these features are common in muddy turbidites. U–Th–Pb dating of detrital monazite and authigenic xenotime in the slates supports previous evidence that the dominant cleavage, in this unit, formed during the Benambran Orogeny. The whole-rock composition of the slates is similar to black slates in the Adaminaby Group, NSW. A review of Paleozoic whole-rock compositions from the Lachlan Orogen confirms they all have trace element contents similar to average Australian shale. However, there are subtle differences in composition. The Turquoise Bluff Slate and other Mathinna Supergroup rocks from the Eastern Tasmania Terrane have higher average Cr content than similar age turbidites from Victoria and NSW. This probably reflects a small contribution from Tasmania Cambrian ultramafic rocks in the provenance. If this were correct, northeastern Tasmania was closer to western Tasmania in the Paleozoic than other provinces of the Lachlan Orogen, southeastern Australia. Other subtle features of the whole-rock composition of Paleozoic sedimentary rocks from the Lachlan Orogen indicate it may be possible to recognise provincial variations in composition that will provide new constraints on tectonic models of southeastern Australia.
DOI: 10.6084/m9.figshare.7410377.v1
title: In search of Gondwana heritage in the Outer Melanesian Arc: no pre-upper Eocene detrital zircons in Viti Levu river sands (Fiji Islands)

description: Volcanic arcs of the Southwest Pacific, collectively referred to as the Outer Melanesian Arc, are generally thought to result from subduction of the Pacific Plate since the Late Cretaceous. Meanwhile, it is largely accepted that eastward roll-back of the old and dense oceanic plate allowed opening of marginal basins, which isolated large blocks of the former Gondwana margin. Incidentally, some ‘intra-oceanic’ volcanic arcs may have been nucleated on small continental fragments. Detrital zircons collected from sand banks in the mid-reaches of rivers from Viti Levu Island have been analysed for U–Pb geochronology and geochemistry, in order to search for a possible ancient continental arc basement, remnants of a Late Cretaceous arc, and determine the timing and evolution of Fiji arc magmatism. In contrast with some other places of the Outer Melanesian Arc (Solomon, Vanuatu), no pre-upper Eocene zircons have been found. Thus, Gondwana-derived fragments or Late Cretaceous–Paleocene arc remnants are unlikely to form the basement of Viti Levu. Zircon geochemistry confirms the purely intra-oceanic character of volcanic-arc magmatism as well. Variations in some trace-element ratios closely reflect the evolution of Viti Levu Arc from upper Eocene inception to upper Miocene climax and finally Pliocene intra-arc rifting and abandonment.