31 to 40 of 510 Results
Dec 8, 2020
Vanessa Bailey, 2020, "HD 219134 Revisited: Planet d Transit Upper Limit and Planet f Transit Non-Detection with ASTERIA and TESS", https://doi.org/10.48577/jpl.MTOJHC, Astronomical Journal, JPL Open Repository
HD 219134 is a K3V dwarf star with six reported planets discovered by the radial velocity method. The two innermost planets HD 219134 b and c show transits, raising the possibility of the HD 219134 system to be the nearest (6.53 pc), brightest (V=5.57) example of a star with a co... |
Dec 8, 2020
Fisher, Joshua B, 2020, "Once upon a time, in AmeriFlux", https://doi.org/10.48577/jpl.OL7ACP, Journal of Geophysical Research, JPL Open Repository
In October 2020, under COVID-19 quarantine, AmeriFlux held its largest and one of its most successful annual meetings . Historically, ~100 scientists attend; this meeting had over 400 registrants and participants. Participants expressed that this was among the best virtual meetin... |
Dec 8, 2020
Ziemer, John K, 2020, "Emission modes in electrospray thrusters operating with high conductivity ionic liquids", https://doi.org/10.48577/jpl.FC5Y5N, Journal of Propulsion and Power, JPL Open Repository
Abstract: Electrospray thruster life and mission performance are strongly influenced by grid impingement, the extent of which can be correlated to emission modes that occur at steady-state extraction voltages, and thruster command transients. Most notably, we experimentally obser... |
Dec 8, 2020
Jensen, Daniel J, 2020, "Aboveground biomass distributions and vegetation composition changes in Louisiana’s Wax Lake Delta", https://doi.org/10.48577/jpl.LGYT4W, Estuarine, Coastal and Shelf Science, JPL Open Repository
The Wax Lake Delta (WLD) is an actively prograding delta in the Mississippi River Delta Plain that is otherwise experiencing widespread degradation and submergence of its coastal wetlands. The WLD is actively accumulating mineral and organic sediment that increases soil surface e... |
Dec 7, 2020
Fisher, Joshua B, 2020, "Integrating Field Observations and Reactive Transport Modeling to Predict Watershed Water Quality under Environmental Perturbations", https://doi.org/10.48577/jpl.AW9SDR, Journal of Hydrology, JPL Open Repository
Watersheds play a critical role in supplying water resources needed for humanuse and ecosystem health. Understanding and predicting how, when,and where changes in the quantity and quality of water resources occur underdierent environmental stresses including extreme events is cr... |
Dec 7, 2020
Fisher, Joshua B, 2020, "Root-derived inputs are major contributors to soil carbon in temperate forests, but vary by mycorrhizal type", https://doi.org/10.48577/jpl.STJTR6, Ecology Letter, JPL Open Repository
Roots promote the formation of slow-cycling soil carbon (C), yet we have limited understanding of the magnitude and controls on this flux. We hypothesized arbuscular mycorrhizal (AM)- and ectomycorrhizal (ECM)-associated trees would exhibit differences in root-derived C accumulat... |
Dec 3, 2020
Wang, Yuan, 2020, "Air quality impact of the Northern California Camp Fire of November 2018", https://doi.org/10.48577/jpl.W3SQPW, Atmospheric Chemistry and Physics, JPL Open Repository
The Northern California Camp Fire that took place in November 2018 was one of the most damaging environmental events in California history. Here, we analyze ground-based station observations of airborne particulate matter that has a diameter < 2.5 micrometers (PM2.5) across north... |
Dec 3, 2020
Willems, Phil A, 2020, "NASA’s starshade technology development activity", https://doi.org/10.48577/jpl.O2YIAA, Journal of Astronomical Telescope, Instrumentation, and Systems, JPL Open Repository
NASA is developing starshade technology to Technology Readiness Level 5 within a directed activity called S5. The objective of S5 is to mature starshade technology to the level that exoplanet imaging missions such as Starshade Rendezvous and HabEx can begin the formulation phase.... |
Dec 1, 2020
Michelle Santee, 2020, "Initial Results and Diurnal Variations Measured by a new Microwave Stratospheric ClO Instrument at Mauna Kea", https://doi.org/10.48577/jpl.VPE4BM, Journal of Geophysical Research: Atmosphere, JPL Open Repository
We present the first year of ClO and O3 measurements from a new 278 GHz Chlorine monOxide Experiment (ChlOE) microwave instrument on Mauna Kea. We make use of comparisons with the Aura Microwave Limb Sounder (MLS) O3 measurements to recalibrate the ground‐based instrument and fin... |
Dec 1, 2020
Alimo, Shahrouz R, 2020, "Deep Space Network Scheduling via Mixed Integer Linear Programming", https://doi.org/10.48577/jpl.CKAWCB, IEEE Access, JPL Open Repository
NASA’s Deep Space Network (DSN) is a globally-spanning communications network responsible for supporting the interplanetary spacecraft missions of NASA and other international users. The DSN is a highly utilized asset, and the large demand for its’ services makes the assignment o... |
