Search Results - "MCNUTT, Ralph L"
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Low-degree structure in Mercury's planetary magnetic field
Published in Journal of Geophysical Research Planets (01-12-2012)“…The structure of Mercury's internal magnetic field has been determined from analysis of orbital Magnetometer measurements by the MESSENGER spacecraft. We…”
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MESSENGER Observations of Magnetic Reconnection in Mercury's Magnetosphere
Published in Science (American Association for the Advancement of Science) (01-05-2009)“…Solar wind energy transfer to planetary magnetospheres and ionospheres is controlled by magnetic reconnection, a process that determines the degree of…”
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Cassini Ion and Neutral Mass Spectrometer: Enceladus Plume Composition and Structure
Published in Science (American Association for the Advancement of Science) (10-03-2006)“…The Cassini spacecraft passed within 168.2 kilometers of the surface above the southern hemisphere at 19:55:22 universal time coordinated on 14 July 2005…”
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The Major-Element Composition of Mercury's Surface from MESSENGER X-ray Spectrometry
Published in Science (American Association for the Advancement of Science) (30-09-2011)“…X-ray fluorescence spectra obtained by the MESSENGER spacecraft orbiting Mercury indicate that the planet's surface differs in composition from those of other…”
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The Global Magnetic Field of Mercury from MESSENGER Orbital Observations
Published in Science (American Association for the Advancement of Science) (30-09-2011)“…Magnetometer data acquired by the MESSENGER spacecraft in orbit about Mercury permit the separation of internal and external magnetic field contributions. The…”
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Evidence for Water Ice Near Mercury's North Pole from MESSENGER Neutron Spectrometer Measurements
Published in Science (American Association for the Advancement of Science) (18-01-2013)“…Measurements by the Neutron Spectrometer on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft show decreases in the flux…”
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Topography of the Northern Hemisphere of Mercury from MESSENGER Laser Altimetry
Published in Science (American Association for the Advancement of Science) (13-04-2012)“…Laser altimetry by the MESSENGER spacecraft has yielded a topographic model of the northern hemisphere of Mercury. The dynamic range of elevations is…”
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MESSENGER Observations of Extreme Loading and Unloading of Mercury's Magnetic Tail
Published in Science (American Association for the Advancement of Science) (06-08-2010)“…During MESSENGER's third flyby of Mercury, the magnetic field in the planet's magnetic tail increased by factors of 2 to 3.5 over intervals of 2 to 3 minutes…”
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MESSENGER observations of magnetopause structure and dynamics at Mercury
Published in Journal of geophysical research. Space physics (01-03-2013)“…On 18 March 2011, MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) became the first spacecraft to orbit Mercury, providing a new…”
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Modular model for Mercury's magnetospheric magnetic field confined within the average observed magnetopause
Published in Journal of geophysical research. Space physics (01-06-2015)“…Accurate knowledge of Mercury's magnetospheric magnetic field is required to understand the sources of the planet's internal field. We present the first model…”
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Return to Mercury: A Global Perspective on MESSENGER's First Mercury Flyby
Published in Science (American Association for the Advancement of Science) (04-07-2008)“…In January 2008, the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft became the first probe to fly past the planet Mercury…”
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Reflectance and Color Variations on Mercury: Regolith Processes and Compositional Heterogeneity
Published in Science (American Association for the Advancement of Science) (04-07-2008)“…Multispectral images of Mercury obtained by the MESSENGER spacecraft reveal that its surface has an overall relatively low reflectance with three large-scale…”
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MESSENGER observations of Mercury's dayside magnetosphere under extreme solar wind conditions
Published in Journal of geophysical research. Space physics (01-10-2014)“…The structure of Mercury's dayside magnetosphere is investigated during three extreme solar wind dynamic pressure events. Two were the result of coronal mass…”
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Radioactive Elements on Mercury's Surface from MESSENGER: Implications for the Planet's Formation and Evolution
Published in Science (American Association for the Advancement of Science) (30-09-2011)“…The MESSENGER Gamma-Ray Spectrometer measured the average surface abundances of the radioactive elements potassium (K, 1150 ± 220 parts per million), thorium…”
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MESSENGER Observations of the Composition of Mercury's Ionized Exosphere and Plasma Environment
Published in Science (American Association for the Advancement of Science) (04-07-2008)“…The region around Mercury is filled with ions that originate from interactions of the solar wind with Mercury's space environment and through ionization of its…”
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Mercury's Magnetosphere After MESSENGER's First Flyby
Published in Science (American Association for the Advancement of Science) (04-07-2008)“…Observations by MESSENGER show that Mercury's magnetosphere is immersed in a comet-like cloud of planetary ions. The most abundant, Na⁺, is broadly distributed…”
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Structure of Mercury's Magnetic Field from MESSENGER's First Flyby
Published in Science (American Association for the Advancement of Science) (04-07-2008)“…During its first flyby of Mercury, the MESSENGER spacecraft measured the planet's near-equatorial magnetic field. The field strength is consistent to within an…”
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Steady-state field-aligned currents at Mercury
Published in Geophysical research letters (16-11-2014)“…Magnetic field observations acquired in orbit about Mercury by the MESSENGER spacecraft demonstrate the presence in the planet's northern hemisphere of…”
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Distribution and compositional variations of plasma ions in Mercury's space environment: The first three Mercury years of MESSENGER observations
Published in Journal of geophysical research. Space physics (01-04-2013)“…We have analyzed measurements of planetary ions near Mercury made by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) Fast Imaging…”
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MESSENGER observations of dipolarization events in Mercury's magnetotail
Published in Journal of Geophysical Research: Space Physics (01-12-2012)“…Several series of large dipolarization events are documented from magnetic field observations in Mercury's magnetotail made by the MESSENGER spacecraft. The…”
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