Results 1 to 10 of about 2,463,978 (199)
Thermospheric Density Response to the QBO Signal
Atmosphere, 2023 In this study, we focused on the periodic variations of global average thermospheric density, derived from orbital decay measurements of about 5000 space objects from 1967 to 2013, by using the wavelet power spectrum method. The results demonstrated that
Bo Li, Ruifei Cui, Libin Weng
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A model of high‐latitude thermospheric density [PDF]
Journal of Geophysical Research: Space Physics, 2015 AbstractWe present an empirical model of the high‐latitude air density at 450 km, derived from accelerometer measurements by the CHAllenging Minisatellite Payload and Gravity Recovery and Climate Experiment satellites during 2002–2006, which we call HANDY (High‐Latitude Atmospheric Neutral DensitY). HANDY consists of a quiet model and disturbance model.
Yosuke Yamazaki +2 more
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Study on the Thermospheric Density Distribution Pattern during Geomagnetic Activity [PDF]
Applied Sciences, 2023 The atmospheric density of the thermosphere is a fundamental parameter for spacecraft launch and orbit control. Under magnetic storm conditions, the thermospheric atmospheric density experiences significant fluctuations, which have a negative impact on ...
Lirong Yin +6 more
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Longitudinal Variation of Thermospheric Density during Low Solar Activity from APOD Observations
Atmosphere, 2023 The longitudinal distribution of upper atmospheric density has been broadly studied. However, the studies mostly focused on 24 h averaged distribution.
Guangming Chen +6 more
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Seasonal variation of thermospheric density and composition [PDF]
Journal of Geophysical Research, 2009 Thermospheric neutral density and composition exhibit a strong seasonal variation, with maxima near the equinoxes, a primary minimum during northern hemisphere summer, and a secondary minimum during southern hemisphere summer. This pattern of variation is described by thermospheric empirical models. However, the mechanisms are not well understood.
Stanley Solomon, Liying Qian
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Real‐Time Thermospheric Density Estimation via Two‐Line Element Data Assimilation
Space Weather, 2020 Inaccurate estimates of the thermospheric density are a major source of error in low Earth orbit prediction. Therefore, real‐time density estimation is required to improve orbit prediction.
David J. Gondelach, Richard Linares
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Impact of Thermospheric Mass Density on the Orbit Prediction of LEO Satellites
Space Weather, 2020 Many thermospheric mass density (TMD) variations have been recognized in observations and physical simulations; however, their impact on the low‐Earth‐orbit satellites has not been fully evaluated.
Changyong He +8 more
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Thermospheric temperature and density variations [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractThe thermosphere is the transition region from the atmosphere to space. Both the solar ultraviolet radiation and the solar wind energy inputs have caused significant thermospheric variations from past to present. In order to understand thermospheric/ionospheric disturbances in association with changes in solar activity, observational and ...
Hitoshi Fujiwara +6 more
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Large‐Scale Disturbances in the Upper Thermosphere Induced by the 2022 Tonga Volcanic Eruption
Geophysical Research Letters, 2023 The effects of volcanic eruptions on the ionosphere have been well studied, however, evidence for the anticipated upper atmospheric neutral variations and their exact extents of change are rarely available.
Ruoxi Li +10 more
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Atmosphere, 2023 In this article, high spatiotemporal resolution data obtained by the atmospheric density detector carried by China’s APOD satellite are used to study the hemispheric asymmetry of thermospheric density.
Jiangzhao Ai +6 more
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