Results 11 to 20 of about 88,706 (269)
Journal of Space Weather and Space Climate, 2021 The Constellation Observing System for Meteorology, Ionosphere, and Climate 2 (COSMIC-2) mission was launched into a low-inclination (24°) orbit on June 25, 2019.
Cherniak Iurii +7 more
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Scholarpedia, 2015 This article, written for Scolarpedia, provides a brief introduction into the subject of cosmic strings, together with a review of their main properties, cosmological evolution and observational signatures.
Tanmay Vachaspati +2 more
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The Fourteenth Marcel Grossmann Meeting, 2017 Cosmological hysteresis, has interesting and vivid implications in the scenario of a cyclic bouncy universe. This, purely thermodynamical in nature, is caused by the asymmetry in the equation of state parameter during expansion and contraction phase of the universe, due to the presence of a single scalar field.
Choudhury, Sayantan, Banerjee, Shreya
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A review on natural background radiation
Advanced Biomedical Research, 2013 The world is naturally radioactive and approximately 82% of human-absorbed radiation doses, which are out of control, arise from natural sources such as cosmic, terrestrial, and exposure from inhalation or intake radiation sources.
Daryoush Shahbazi-Gahrouei +2 more
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Ionospheric correction of GPS radio occultation data in the troposphere [PDF]
Atmospheric Measurement Techniques, 2016 For inversions of the GPS radio occultation (RO) data in the neutral atmosphere, this study investigates an optimal transition height for replacing the standard ionospheric correction using the linear combination of the L1 and L2 bending angles with the ...
Z. Zeng +5 more
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Atmospheric GNSS RO 1D-Var in Use at UCAR: Description and Validation
Remote Sensing, 2022 This paper describes, along with some validation results, the one-dimensional variational method (1D-Var) that is in use at the University Corporation for Atmospheric Research (UCAR) to retrieve atmospheric profiles of temperature, pressure, and humidity
Tae-Kwon Wee +4 more
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Physical Review D, 2012 We derive general covariant expressions for the six independent observable modes of distortion of ideal standard rulers in a perturbed Friedmann-Robertson-Walker spacetime. Our expressions are gauge-invariant and valid on the full sky. These six modes are most naturally classified in terms of their rotational properties on the sphere, yielding two ...
Schmidt, Fabian, Jeong, Donghui
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Physics Letters A, 2011 We discuss time-dependent gravitational fields that "accelerate" free test particles to the speed of light resulting in cosmic double-jet configurations. It turns out that complete gravitational collapse along a spatial axis together with corresponding expansion along the other two axes leads to the accelerated motion of free test particles up and down
Chicone, C., Mashhoon, B., Rosquist, K.
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Cosmic Influence on the Sun-Earth Environment
Sensors, 2008 SOHO satellite data reveals geophysical changes before sudden changes in the Earth's Sun-Earth environment. The influence of extragalactic changes on the Sun as well as the Sun-Earth environment seems to be both periodic and episodic.
Saumitra Mukherjee
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Monthly Notices of the Royal Astronomical Society, 2007 The cosmological principle, promoting the view that the universe is homogeneous and isotropic, is embodied within the mathematical structure of the Robertson-Walker (RW) metric. The equations derived from an application of this metric to the Einstein Field Equations describe the expansion of the universe in terms of comoving coordinates, from which ...
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