Results 21 to 30 of about 24,137 (262)

Validation of Auric Model with EUV/FUV Dayglow Observation of STP78-1 Satellite [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
We carried out a validation study on AURIC FUV/EUV dayglow calculation with OII 834AA, OI 989AA, OI 1027AA, NII 1085AA, NI 1134AA, NI 1200AA, OI 1304AA, OI 1356AA dayglows observed by STP78-1 satellite.
Mi Ji Kang, Jeong-Han Kim, Yong Ha Kim
doaj   +1 more source

The operational and research DTM-2020 thermosphere models

open access: yesJournal of Space Weather and Space Climate, 2021
Aims: The semi-empirical Drag Temperature Models (DTM) predict the Earth’s thermosphere’s temperature, density, and composition, especially for orbit computation purposes.
Bruinsma Sean, Boniface Claude
doaj   +1 more source

On the fast movements of the thermosphere: an interpretation [PDF]

open access: yesAnnales Geophysicae, 2000
Abstract. We examine the oscillations of the meridional neutral wind in the F region as seen by the EISCAT radar. We propose an interpretation in term of eddies (tourbillons) of typical size of a few tens to a few hundreds of kilometers. The observed rotation velocity is a few hundreds of meters per second.
Lilensten, J., Amblard, Pierre-Olivier
openaire   +5 more sources

An intense thermospheric jet on Titan [PDF]

open access: yesNature Astronomy, 2019
Winds in Titan's lower and middle atmosphere have been determined by a variety of techniques, including direct measurements from the Huygens Probe over 0-150 km, Doppler shifts of molecular spectral lines in the optical, thermal infrared and mm ranges, probing altogether the ~100-450 km altitude range, and inferences from thermal field over 10 mbar ...
Lellouch, E.   +9 more
openaire   +6 more sources

The Impact of Assimilating Ionosphere and Thermosphere Observations on Neutral Temperature Improvement: Observing System Simulation Experiments Using EnKF

open access: yesSpace Weather, 2021
Accurate specification of the thermosphere states is crucial to the low Earth orbit satellite operation. In this work, the impact of different ionosphere and thermosphere observing systems on the improvement of neutral temperature of the data ...
Jianhui He, Xinan Yue, Zhipeng Ren
doaj   +1 more source

Polar heating in Saturn's thermosphere [PDF]

open access: yesAnnales Geophysicae, 2005
Abstract. A 3-D numerical global circulation model of the Kronian thermosphere has been used to investigate the influence of polar heating. The distributions of temperature and winds resulting from a general heat source in the polar regions are described.
Smith, C. G. A.   +3 more
openaire   +4 more sources

Mesosphere and Lower Thermosphere

open access: yesAtmosphere, 2023
The mesosphere and low thermosphere (MLT) region is defined as the region of the atmosphere between approximately 60 and 110 km in height [...]
Chen Zhou, Zhibin Yu
openaire   +2 more sources

Propagation of sonic booms in the thermosphere [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1978
A nonlinear theory for the long-range propagation of sonic booms through the thermosphere has been developed. A realistic atmosphere is employed, and consideration is given to such factors as nonlinear stretching and decay of the wave, the effects of the caustic, the linear acoustic attenuation, and the increase in Mach number due to the decreasing ...
Peter H. Rogers, J. H. Gardner
openaire   +3 more sources

Scientific motivations and future directions of whole atmosphere modeling

open access: yesFrontiers in Astronomy and Space Sciences, 2022
The recent development of whole atmosphere models that extend from the surface to the upper thermosphere represents a significant advance in modeling capabilities of the ionosphere-thermosphere.
N. M. Pedatella, N. M. Pedatella
doaj   +1 more source

MSIS‐UQ: Calibrated and Enhanced NRLMSIS 2.0 Model With Uncertainty Quantification

open access: yesSpace Weather, 2022
The Mass Spectrometer and Incoherent Scatter radar (MSIS) model family has been developed and improved since the early 1970's. The most recent version of MSIS is the Naval Research Laboratory (NRL) MSIS 2.0 empirical atmospheric model.
Richard J. Licata   +4 more
doaj   +1 more source

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