Results 21 to 30 of about 6,139 (217)
Space Weather, 2020 We propose a new method to derive the nightside thermospheric density by extending Global Ultraviolet Imager (GUVI) dayside limb observations using empirical orthogonal function (EOF) analysis. First, we acquire the GUVI dayside total mass density during
Tingting Yu +3 more
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Earth, Planets and Space, 2021 Thermospheric mass density values around the 400-km altitude in the cusp can be significantly enhanced as compared to regions around the cusp. To gain insights into the extent to which the magnitude of the cusp mass density enhancements can be explained ...
Tomokazu Oigawa +2 more
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Climatology of globally averaged thermospheric mass density [PDF]
Journal of Geophysical Research: Space Physics, 2010 We present a climatological analysis of daily globally averaged density data, derived from orbit data and covering the years 1967–2007, along with an empirical Global Average Mass Density Model (GAMDM) that encapsulates the 1986–2007 data. The model represents density as a function of the F10.7 solar radio flux index, the day of year, and the Kp ...
J. T. Emmert, J. M. Picone
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Recent progress on the retrieval and modeling of thermosphere mass density
地球与行星物理论评, 2023 The thermosphere is the atmospheric layer extending from about 90 km to nearly 1000 kilometers, which is an important interreaction area between the Sun and the Earth.
Jiuhou Lei +4 more
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Thermospheric winds and temperatures above Mawson, Antarctica, observed with an all-sky imaging, Fabry-Perot spectrometer [PDF]
, 2009 A new all-sky imaging Fabry-Perot spectrometer has been installed at Mawson station (67°36' S, 62°52' E), Antarctica. This instrument is capable of recording independent spectra from many tens of locations across the sky ...
Anderson, C. +4 more
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Atomic nitrogen densities in the thermosphere
Geophysical Research Letters, 1976 Recently atomic nitrogen densities of ∼106cm−3 were measured at 400 km by the open source mass spectrometer on the Atmosphere Explorer‐C satellite (AE‐C). Daytime N densities ∼5 × 107cm−3 at 160 km have also been inferred from airglow and other measurements on AE‐C.
D. G. Torr +9 more
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Investigation of energy transport and thermospheric upwelling during quiet magnetospheric and ionospheric conditions from the studies of low- and middle-altitude cusp [PDF]
Annales Geophysicae, 2015 We investigate energy fluxes and small, kilometre-scale Birkeland currents in the magnetospheric cusp at a 1–3 Earth radii altitude and in the ionosphere using satellites when they were, according to the Tsyganenko model, in magnetic conjunction ...
T. Živković +5 more
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Data assimilation of thermospheric mass density
Space Weather, 2012 Accurate modeling of thermospheric mass density variation is of foremost importance to low Earth orbital prediction. The accuracy of empirical neutral density models based on global indices for solar and geomagnetic activity is inherently limited by the resolution of these indices.
Matsuo, T. +3 more
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Drag Coefficient Constraints for Space Weather Observations in the Upper Thermosphere
Space Weather, 2022 The space weather research community relies heavily on thermospheric density data to understand long‐term thermospheric variability, construct assimilative, empirical, and semiempirical global atmospheric models and validate model performance. One of the
Valerie Bernstein, Marcin Pilinski
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Thermospheric Temperature and Density Variability During 3–4 February 2022 Minor Geomagnetic Storm
Space Weather, 2023 Themospheric conditions during a minor geomagnetic event of 3 and 4 February 2022 has been investigated using disk temperature (Tdisk) observations from Global‐scale Observations of the Limb and Disk (GOLD) mission and model simulations.
F. I. Laskar +10 more
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