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  1. Atlantic Tropical Weather Outlook

    000
    ABNT20 KNHC 230510
    TWOAT

    TROPICAL WEATHER OUTLOOK
    NWS NATIONAL HURRICANE CENTER MIAMI FL
    100 AM EST SUN NOV 23 2014

    For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
  2. Atlantic Tropical Weather Outlook

    000
    ABNT20 KNHC 222336
    TWOAT

    TROPICAL WEATHER OUTLOOK
    NWS NATIONAL HURRICANE CENTER MIAMI FL
    700 PM EST SAT NOV 22 2014

    For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
  3. Distilling the Verification Process for Prognostics Algorithms

    Abstract: The goal of prognostics and health management (PHM) systems is to ensure system safety, and reduce downtime and maintenance costs. It is important that a PHM system is verified and...
  4. Adventures in Modern Time Series Analysis: From the Sun to the Crab Nebula and Beyond

    Abstract: With the generation of long, precise, and finely sampled time series the Age of Digital Astronomy is uncovering and elucidating energetic dynamical processes throughout the Universe....
  5. Mars: A Planet with a Dynamic Climate System

    Abstract: Mars is a well-observed planet. Since the 1960s orbiters, landers, rovers, and earth-based telescopic observations show that its climate system is dynamic. Its dynamic nature, largely the...
  6. CALIPSO Observations of Transatlantic Dust: Vertical Stratification and Effect of Clouds

    Abstract: We use CALIOP nighttime measurements of lidar backscatter, color and depolarization ratios, as well as particulate retrievals during the summer of 2007 to study transatlantic dust...
  7. Transient Convection Due to Imposed Heat Flux: Application to Liquid-Acquisition Devices

    Abstract: A model problem is considered that addresses the effect of heat load from an ambient laboratory environment on the temperature rise of liquid nitrogen inside an enclosure. This model has...
  8. Traveling-Wave Tube Amplifier Second Harmonic as Millimeter-Wave Beacon Source for Atmospheric Propagation Studies

    Abstract: This paper presents the design and test results of a CW millimeter-wave satellite beacon source, based on the second harmonic from a traveling-wave tube amplifier and utilizes a novel...
  9. Erasing the Variable: Empirical Foreground Discovery for Global 21 cm Spectrum Experiments

    Abstract: Spectral measurements of the 21 cm monopole background have the promise of revealing the bulk energetic properties and ionization state of our universe from z approx. 6 - 30. Synchrotron...
  10. Surface Albedo Darkening from wildfires in Northern Sub-Saharan Africa

    Abstract: Wildfires are recognized as a key physical disturbance of terrestrial ecosystems and a major source of atmospheric trace gases and aerosols. They are known to produce changes in landscape...
  11. Uncertainty Quantification of GEOS-5 L-band Radiative Transfer Model Parameters Using Bayesian Inference and SMOS Observations

    Abstract: Uncertainties in L-band (1.4 GHz) radiative transfer modeling (RTM) affect the simulation of brightness temperatures (Tb) over land and the inversion of satellite-observed Tb into soil...
  12. NASA Spinoff Article: Heat Shield Paves the Way for Commercial Space

    Abstract: No abstract available

    More...
  13. NASA Spinoff Article: Vision Algorithms Catch Defects in Screen Displays

    Abstract: No abstract available

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  14. On the Reprocessing and Reanalysis of Observations for Climate

    Abstract: The long observational record is critical to our understanding of the Earths climate, but most observing systems were not developed with a climate objective in mind. As a result, tremendous...
  15. NASA Spinoff Article: Data Mining Tools Make Flights Safer, More Efficient

    Abstract: No abstract available

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  16. Multi-Tone Millimeter-Wave Frequency Synthesizer for Atmospheric Propagation Studies

    Abstract: This paper presents the design and test results of a multi-tone millimeter-wave frequency synthesizer, based on a solid-state frequency comb generator. The intended application of the...
  17. NASA Spinoff Article: Mars Technologies Spawn Durable Wind Turbines

    Abstract: No abstract available

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  18. Curiosity at Gale Crater, Mars: Characterization and Analysis of the Rocknest Sand Shadow

    Abstract: The Rocknest aeolian deposit is similar to aeolian features analyzed by the Mars Exploration Rovers (MER) Spirit and Opportunity. The fraction of sand
  19. The Evolution of System Safety at NASA

    Abstract: The NASA system safety framework is in the process of change, motivated by the desire to promote an objectives-driven approach to system safety that explicitly focuses system safety efforts...
  20. Strong Temporal Variation Over One Saturnian Year: From Voyager to Cassini

    Abstract: Here we report the combined spacecraft observations of Saturn acquired over one Saturnian year (approximately 29.5 Earth years), from the Voyager encounters (1980-81) to the new Cassini...
  21. Evidence for Perchlorates and the Origin of Chlorinated Hydrocarbons Detected by SAM at the Rocknest Aeolian Deposit in Gale Crater

    Abstract: A single scoop of the Rocknest aeolian deposit was sieved (less than 150 micrometers), and four separate sample portions, each with a mass of approximately 50 mg, were delivered to...
  22. Modifications of the Quasi-biennial Oscillation by a Geoengineering Perturbation of the Stratospheric Aerosol Layer

    Abstract: This paper examines the impact of geoengineering via stratospheric sulfate aerosol on the quasi-biennial oscillation (QBO) using the NASA Goddard Earth Observing System (GEOS-5) Chemistry...
  23. How Well Do Global Climate Models Simulate the Variability of Atlantic Tropical Cyclones Associated with ENSO?

    Abstract: The variability of Atlantic tropical cyclones (TCs) associated with El Nino-Southern Oscillation (ENSO) in model simulations is assessed and compared with observations. The model...
  24. Autonomous Mission Operations Roadmap

    Abstract: As light time delays increase, the number of such situations in which crew autonomy is the best way to conduct the mission is expected to increase. However, there are significant open...
  25. Thrust Measurement of Dielectric Barrier Discharge (DBD) Plasma Actuators: New Anti-Thrust Hypothesis, Frequency Sweeps Methodology, Humidity and Enclosure Effects

    Abstract: We discuss thrust measurements of Dielectric Barrier Discharge (DBD) plasma actuators devices used for aerodynamic active flow control. After a review of our experience with conventional...
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