Results 171 to 180 of about 6,139 (217)

Thermospheric mass density: A review

Advances in Space Research, 2015
Abstract The mass density of Earth’s thermosphere (∼90–600 km altitude) is a critical parameter for low Earth orbit prediction because of the atmospheric drag on satellites in this region. In this review, we first survey techniques for measuring thermospheric density, empirical models that provide a synthesis of historical data, and physical models ...
openaire   +3 more sources

Thermospheric density cells at high latitudes

Advances in Space Research, 1999
Abstract NCAR-TIGCM simulations predict mesoscale cellular structures in the high latitude neutral density which could serve as a unifying framework for the analysis and interpretation of measurements in this region (e.g. Crowley et al., 1996; Schoendorf et al., 1996a). Here we compare these model predictions with ESRO 4 and DE 2 satellite data.
T. Caspers, G.W. Prölss
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Thermospheric densities for the Swarm satellite mission

2021
<p>The European Space Agency (ESA) Swarm mission was launched in November 2013 and consists of three identical satellites flying in near-polar orbits. One satellite is flying at about 515 km, while the other two satellites are flying side-by-side at lower altitudes, starting at 480 km altitude and slowly descending due to atmospheric drag
Jose van den IJssel   +2 more
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The JB2006 empirical thermospheric density model

Journal of Atmospheric and Solar-Terrestrial Physics, 2008
Abstract A new empirical atmospheric density model is developed using the CIRA72 (Jacchia 71) model as the basis for the diffusion equations. New solar indices based on orbit-based sensor data are used for the solar irradiances in the extreme and far ultraviolet wavelengths.
Bruce R. Bowman   +3 more
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Thermospheric Density Modeling During Magnetic Storms

AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2008
During quiet conditions, thermospheric models show good statistical agreement with measured neutral densities. However when magnetic activity increases, there is significant discrepancy between both the magnitude of the change in neutral density and the timing of the change.
Cheryl Huang   +5 more
openaire   +1 more source

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