Real-time measurement of volcanic SO2 emissions: validation of a
... continuous monitoring systems greatly facilitates this. For example, the Montserrat Volcano Observatory has deployed up to 2–3 scanning UV spectrometers (ScanSpec) to simultaneously measure both the plume height and instantaneous gas flux; these data are then telemetered back to the observatory (Edm ...
... continuous monitoring systems greatly facilitates this. For example, the Montserrat Volcano Observatory has deployed up to 2–3 scanning UV spectrometers (ScanSpec) to simultaneously measure both the plume height and instantaneous gas flux; these data are then telemetered back to the observatory (Edm ...
The future of gamma-ray astronomy
... The Cherenkov light was detected by 2 large search light mirrors ( f/0.45 mirrors of 90 cm dia) focused onto fast (56 AVP) photo-multipliers (PMT) placed at their foci. The full field of view of each mirror was . The approximate collection area of high energy -rays was and the threshold energy of de ...
... The Cherenkov light was detected by 2 large search light mirrors ( f/0.45 mirrors of 90 cm dia) focused onto fast (56 AVP) photo-multipliers (PMT) placed at their foci. The full field of view of each mirror was . The approximate collection area of high energy -rays was and the threshold energy of de ...
Numerical modeling of plasma structures and turbulence transport in
... embedded magnetic field by numerically solving the equations of magnetohydrodynamics (MHD). The main numerical tool used throughout this work is the state-ofthe-art MHD code Cronos, which is extended from its basic setup to adequately describe the supersonic solar wind. First, solar rotation effects ...
... embedded magnetic field by numerically solving the equations of magnetohydrodynamics (MHD). The main numerical tool used throughout this work is the state-ofthe-art MHD code Cronos, which is extended from its basic setup to adequately describe the supersonic solar wind. First, solar rotation effects ...
are coronae of late-type stars made of solar-like structures? the x
... particular, this work shows that stellar coronae can be composed of X-ray–emitting structures similar to those present in the solar corona. To this end we use a large set of ROSAT PSPC observations of late-type stars of all spectral types and activity levels and a large set of solar X-ray data colle ...
... particular, this work shows that stellar coronae can be composed of X-ray–emitting structures similar to those present in the solar corona. To this end we use a large set of ROSAT PSPC observations of late-type stars of all spectral types and activity levels and a large set of solar X-ray data colle ...
Development of a learning progression for the formation of the Solar
... the learning progression – angular momentum, size & scale, and time – but full construct maps for these have not yet been developed. While any one of these dimensions can be analyzed individually, development towards the understanding the formation of the Solar System requires the student to make co ...
... the learning progression – angular momentum, size & scale, and time – but full construct maps for these have not yet been developed. While any one of these dimensions can be analyzed individually, development towards the understanding the formation of the Solar System requires the student to make co ...
17 - Department of Physics and Astronomy
... Radiation pressure: particles 1 μm or less in size strongly affected, and blown out of the Solar system. P-R drag: on longer timescales, cm sized particles spiral into the Sun. • These particles can be trapped in resonances, though, by perturbations larger than the P-R drag. Yarkovsky effect: ...
... Radiation pressure: particles 1 μm or less in size strongly affected, and blown out of the Solar system. P-R drag: on longer timescales, cm sized particles spiral into the Sun. • These particles can be trapped in resonances, though, by perturbations larger than the P-R drag. Yarkovsky effect: ...
slides - Relativity Group
... • Most asteroids (thousands) lie in the asteroid belt, a region between the orbits of Mars and Jupiter • The first asteroid (Ceres) of this asteroid belt swarm was discovered as a result of a search for the “missing planet” of Bode’s law • The combined mass of all the asteroids is probably less than ...
... • Most asteroids (thousands) lie in the asteroid belt, a region between the orbits of Mars and Jupiter • The first asteroid (Ceres) of this asteroid belt swarm was discovered as a result of a search for the “missing planet” of Bode’s law • The combined mass of all the asteroids is probably less than ...
Coast Steel Fabricators
... Finite Element Analysis (FEA) • Static Analysis • Simplified: apply constant pressure q = 0.5•d•V2, where d = air density (1.29kg/m3 at 0C, 1atm), V = wind velocity (m/s), q (kPa); use dynamic factors for gusts, vortex shedding forces, and exposure conditions • Detailed: account for intensity of win ...
... Finite Element Analysis (FEA) • Static Analysis • Simplified: apply constant pressure q = 0.5•d•V2, where d = air density (1.29kg/m3 at 0C, 1atm), V = wind velocity (m/s), q (kPa); use dynamic factors for gusts, vortex shedding forces, and exposure conditions • Detailed: account for intensity of win ...
Fermi Fact Sheet - Fermi Gamma-ray Space Telescope
... short-lived. Although they are among the most energetic explosions in the universe, it is challenging to catch them even with a telescope having a field of view as large as the LAT’s. The Fermi Gamma-ray Burst Monitor solves this problem by providing all-sky coverage with an array of 12 low- and 2 m ...
... short-lived. Although they are among the most energetic explosions in the universe, it is challenging to catch them even with a telescope having a field of view as large as the LAT’s. The Fermi Gamma-ray Burst Monitor solves this problem by providing all-sky coverage with an array of 12 low- and 2 m ...
The 1.5 meter solar telescope GREGOR
... To study the interaction between convection and the magnetic field in the photosphere. In the quiet photosphere, the most important themes are the emergence and removal of magnetic flux and the interaction of the small-scale magnetic flux concentrations with the convective motion – the granulation – ...
... To study the interaction between convection and the magnetic field in the photosphere. In the quiet photosphere, the most important themes are the emergence and removal of magnetic flux and the interaction of the small-scale magnetic flux concentrations with the convective motion – the granulation – ...
PDF of scale model - MESSENGER Education
... System (MDIS): This instrument consists of wide-angle and narrowangle imagers that will map landforms, track variations in surface spectra and gather topographic information. A pivot platform will help point it in whatever direction the scientists choose. The two instruments will enable MESSENGER to ...
... System (MDIS): This instrument consists of wide-angle and narrowangle imagers that will map landforms, track variations in surface spectra and gather topographic information. A pivot platform will help point it in whatever direction the scientists choose. The two instruments will enable MESSENGER to ...
THE SUN - OoCities
... million-electron volts (MeV), in the form of gamma rays or the kinetic energy of the products. If all the hydrogen is converted, 0.7 percent of the mass becomes energy, according to the Einstein formula E = mc2, in which E represents the energy, m is the mass, and c is the speed of light. A calculat ...
... million-electron volts (MeV), in the form of gamma rays or the kinetic energy of the products. If all the hydrogen is converted, 0.7 percent of the mass becomes energy, according to the Einstein formula E = mc2, in which E represents the energy, m is the mass, and c is the speed of light. A calculat ...
Comets review.fm - Journals at the University of Arizona
... explained in full detail in a series of excellent reviews. The third part of Comets II is dedicated to the orbital dynamics of these bodies. There are details on the progress made in the determination of non-gravitational forces and also in the computation of the dynamics and evolution of different ...
... explained in full detail in a series of excellent reviews. The third part of Comets II is dedicated to the orbital dynamics of these bodies. There are details on the progress made in the determination of non-gravitational forces and also in the computation of the dynamics and evolution of different ...
Asteroseismic constraints on Asymmetric Dark Matter: Light particles
... modelling have stellar fundamental properties strongly constrained by photometric and spectroscopic observations. Within that subset, the best candidates are those for which astrometric observations are also available, for example stars observed by both Kepler and Hipparcos [52]. Thus, the ideal can ...
... modelling have stellar fundamental properties strongly constrained by photometric and spectroscopic observations. Within that subset, the best candidates are those for which astrometric observations are also available, for example stars observed by both Kepler and Hipparcos [52]. Thus, the ideal can ...
Solar-B FPP
... • Solar Cycle Evolution • Understand the role of active regions in solar cycle modulation. T. Berger ...
... • Solar Cycle Evolution • Understand the role of active regions in solar cycle modulation. T. Berger ...
Solar flux variation of the electron temperature morning
... ∼95° [Lee et al., 1980]. On the other hand, the photoionization rate does not peak until the solar zenith angle is less than 90°. Thus, the electron heating occurs promptly at sunrise, but the build up of ionization is more gradual so that the cooling by ions is delayed and this allows for a fast ri ...
... ∼95° [Lee et al., 1980]. On the other hand, the photoionization rate does not peak until the solar zenith angle is less than 90°. Thus, the electron heating occurs promptly at sunrise, but the build up of ionization is more gradual so that the cooling by ions is delayed and this allows for a fast ri ...
Galactic Chemical Evolution and the Oxygen Isotopic Composition
... is to use the simplest non-trivial models to explore which effects are most important in the GCE of oxygen. We caution that all GCE models have substantial uncertainties and a model is often considered successful even it only approximately reproduces observations , i.e. the metallicity distribution ...
... is to use the simplest non-trivial models to explore which effects are most important in the GCE of oxygen. We caution that all GCE models have substantial uncertainties and a model is often considered successful even it only approximately reproduces observations , i.e. the metallicity distribution ...
Our Place in Space
... should print out the cards (preferably in color) and laminate them so that the information on each object appears on the reverse side of the image of that object. ...
... should print out the cards (preferably in color) and laminate them so that the information on each object appears on the reverse side of the image of that object. ...
Advanced Composition Explorer
Advanced Composition Explorer (ACE) is a NASA Explorers program Solar and space exploration mission to study matter comprising energetic particles from the solar wind, the interplanetary medium, and other sources. Real-time data from ACE is used by the NOAA Space Weather Prediction Center to improve forecasts and warnings of solar storms. The ACE robotic spacecraft was launched August 25, 1997 and entered a Lissajous orbit close to the L1 Lagrangian point (which lies between the Sun and the Earth at a distance of some 1.5 million km from the latter) on December 12, 1997. The spacecraft is currently operating at that orbit. Because ACE is in a non-Keplerian orbit, and has regular station-keeping maneuvers, the orbital parameters at right are only approximate. The spacecraft is still in generally good condition in 2015, and is projected to have enough fuel to maintain its orbit until 2024. NASA Goddard Space Flight Center managed the development and integration of the ACE spacecraft.