211 to 220 of 266 Results
Jan 31, 2024
Christine Lee, 2024, "Satellite Remote Sensing: A Tool to Support Harmful Algal Bloom Monitoring and Recreational Health Advisories in a California Reservoir", https://doi.org/10.48577/jpl.CXWLWV, AGU Geohealth, JPL Open Repository
Cyanobacterial harmful algal blooms (cyanoHABs) can harm people, animals, and affect consumptive and recreational use of inland waters. Monitoring cyanoHABs is often limited. However, chlorophyll-a (chl-a) is a common water quality metric and has been shown to have a relationship... |
Jan 31, 2024
Alex Akins, 2024, "Subsurface Thermophysical Properties of Europa's Leading and Trailing Hemisphere as Revealed by ALMA", https://doi.org/10.48577/jpl.FFASKC, The Planetary Science Journal, JPL Open Repository
We present best-fit values of porosity – and the corresponding effective ther-12 mal inertiae – determined from three different depths in Europa’s near-subsurface13 (∼ 1 − 20 cm). We find that Europa’s subsurface porosity varies between 75–14 50% (Γef f ≈ 50 − 140 J m−2 K−1 s−1/2... |
Jan 30, 2024
Julie Bellerose, 2024, "Double Asteroid Redirection Test (DART): Navigating to Obliteration", https://doi.org/10.48577/jpl.96LKFT, Acta Astronautica, JPL Open Repository
DART is NASA’s demonstration of an asteroid deflection using a kinetic impactor. The spacecraft launched aboard a SpaceX’s Falcon 9 on November 24th 2021, on a direct collision with the binary asteroid system Didymos planned for September 26th 2022. By impacting the small moon, D... |
Jan 29, 2024
Dariusz Lis, 2024, "The magnetic field in the Flame nebula", https://doi.org/10.48577/jpl.HYYLYD, Astronomy & Astrophysics, JPL Open Repository
Context. Star formation drives the evolution of galaxies and the cycling of matter between different phases of the interstellar medium and stars. The support of interstellar clouds against gravitational collapse by magnetic fields has been proposed as a possible explanation for t... |
Jan 29, 2024
Martin Barmatz, 2024, "Microwave permittivity and permeability measurements on lunar simulants at low temperatures", https://doi.org/10.48577/jpl.CWWQEJ, Icarus, JPL Open Repository
Lunar simulants are used to approximate the behavior of the lunar regolith. This work focuses on materials responses relevant for microwave heating to inform in-situ resource utilization of lunar regolith for landing pads and building infrastructure. Microwave dielectric permitti... |
Jan 29, 2024
Hanii Takahashi, 2024, "Systematic Differences between the Northern and Southern Hemispheres: Warm Frontal Ice Water Path Linked to the Origin of Extratropical Cyclones", https://doi.org/10.48577/jpl.XIU56F, Journal of Climate, JPL Open Repository
Extratropical cyclones (ETCs) produce most of the winter precipitation at mid latitudes, and are often associated with the most extreme winter weather events. For climate models to accurately predict the occurrence and severity of these extreme events in a changing climate, they... |
Jan 29, 2024
Eric Burt, 2024, "DSAC and next generation high stability, long life trapped mercury ion frequency standards", https://doi.org/10.48577/jpl.CKSLMR, The proceedings of the 9th Symposium on Frequency Standards and Metrology held at Kingscliff, NSW, Australia from 16th-20th October 2023., JPL Open Repository
The methods of trapping and cooling of atoms and ions have been transformative for atomic clocks due to the reduction, and in some cases elimination, of major systematic frequency shifts. Continuously operating atomic clocks based on trapped mercury ions have existed for decades... |
Jan 29, 2024
Angelica Rodriguez, 2024, "Applying an Uncrewed Surface Vehicle to Measure Under-Pier Bathymetry", https://doi.org/10.48577/jpl.HLB3UG, JOURNAL OF OCEANIC ENGINEERING, JPL Open Repository
This paper describes a simple and cost-effective solution developed to map generalized bathymetry underneath Navy piers. This challenging environment is constrained by tides, ship movements, varying pier architectures, and sporadic or non-existent GPS signals. We used a small, re... |
Jan 29, 2024
Gregor Steinbruegge, 2024, "Observation of solar radio burst events from Mars orbit with the Shallow Radar instrument", https://doi.org/10.48577/jpl.EOC1IZ, The Astrophysical Journal, JPL Open Repository
Context. Multispacecraft and multiwavelength observations of solar eruptions such as flares and coronal mass ejections are essential to understand the complex processes behind these events. The study of solar burst events in the radio-frequency spectrum has relied almost exclusiv... |
Jan 25, 2024
Navtej Saini, 2024, "Near-Earth Object Observations using Synthetic Tracking", https://doi.org/10.48577/jpl.69JS3A, Publications of the Astronomical Society of the Pacific, JPL Open Repository
Synthetic tracking (ST) has emerged as a potent technique for observing fast- moving near-Earth objects (NEOs), offering enhanced detection sensitivity and astrometric accuracy by avoiding trailing loss. This approach also empowers small telescopes to use prolonged integration ti... |
