Results 31 to 40 of about 6,139 (217)
Density‐Temperature Synchrony in the Hydrostatic Thermosphere [PDF]
Journal of Geophysical Research: Space Physics, 2019 AbstractThe paper presents a detailed analysis of the density‐temperature (ρ‐T) synchrony in the thermosphere using a hydrostatic general circulation model. The numerical models in general offer not only great potential for forecasting the transient response of the thermosphere but also are excellent tools for understanding the driving mechanisms of ...
Timothy Kodikara +3 more
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Thermospheric Parameters during Ionospheric G-Conditions
Remote Sensing, 2021 For the first time thermospheric parameters (neutral composition, exospheric temperature and vertical plasma drift related to thermospheric winds) have been inferred for ionospheric G-conditions observed with Millstone Hill ISR on 11–13 September 2005 ...
Loredana Perrone +2 more
doaj +1 more source
Space Weather, 2020 Empirical models of the thermospheric density are routinely used to perform orbit maintenance, satellite collision avoidance, and estimate time and location of re‐entry for spacecraft.
Daniel A. Brandt +2 more
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Longitudinal structures in lower thermosphere density [PDF]
Journal of Geophysical Research: Space Physics, 1999 Thermospheric densities near 200 km from the Satellite Electrostatic Triaxial Accelerometer (SETA) experiment during July and December 1983 are analyzed to reveal two types of longitude structures: (1) the so‐called “longitude/UT” variation which has been noted in higher‐altitude satellite data and incorporated into the mass spectrometer incoherent ...
openaire +1 more source
An empirical model of the thermospheric mass density derived from CHAMP satellite [PDF]
Annales Geophysicae, 2018 In this study, we present an empirical model, named CH-Therm-2018, of the thermospheric mass density derived from 9-year (from August 2000 to July 2009) accelerometer measurements from the CHAllenging Mini-satellite Payload (CHAMP) satellite at ...
C. Xiong +4 more
doaj +1 more source
Thermospheric density perturbations in response to substorms [PDF]
Journal of Geophysical Research: Space Physics, 2014 AbstractWe use 5 years (2001–2005) of CHAMP (Challenging Minisatellite Payload) satellite data to study average spatial and temporal mass density perturbations caused by magnetospheric substorms in the thermosphere. Using statistics from 2306 substorms to construct superposed epoch time series, we find that the largest average increase in mass density ...
Clausen, L. B. N. +2 more
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Sources of the High-Latitude Thermospheric Neutral Mass Density Variations [PDF]
Journal of Astronomy and Space Sciences, 2010 We investigate the sources of the variation of the high-latitude thermospheric neutral mass density depending on the interplanetary magnetic field (IMF) conditions.
Young-Sil Kwak +4 more
doaj +1 more source
Seasonal Transitions in the Thermosphere Inferred from Ionospheric Observations
Remote Sensing, 2023 Ionospheric observations along with CHAMP/STAR neutral gas density measurements were used to retrieve thermospheric parameters and to check whether the equinox transition season exists separately from the December solstice and June solstice seasons ...
Loredana Perrone, Andrey V. Mikhailov
doaj +1 more source
AGU Advances, Volume 7, Issue 3, June 2026.Abstract In Low Earth Orbit (LEO), atmospheric drag is the dominant source of trajectory prediction error below approximately 700 km altitude, primarily due to inaccuracies in thermospheric density models. This work presents a method for temporally deconvolving Energy Dissipation Rates (EDRs) to produce single‐satellite density estimates, which can be ...
S. Mutschler +6 more
wiley +1 more source
NRLMSIS 2.0: A Whole‐Atmosphere Empirical Model of Temperature and Neutral Species Densities
Earth and Space Science, 2021 NRLMSIS® 2.0 is an empirical atmospheric model that extends from the ground to the exobase and describes the average observed behavior of temperature, eight species densities, and mass density via a parametric analytic formulation.
J. T. Emmert +16 more
doaj +1 more source