Results 81 to 90 of about 8,248 (257)

Thermosphere and exosphere of hot Jupiters [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractHere we describe the observations and the resulting constraints on the upper atmosphere (thermosphere and exosphere) of hot Jupiters. In particular, observations and theoretical modeling of hot-Jupiter evaporation are described. The observations allowed the discovery that the planet orbiting HD209458 has an extended atmosphere of escaping ...
openaire   +2 more sources

Height‐Dependent Evolution of the Ionospheric Response to the May 2024 Superstorm: Global GNSS‐POD, GNSS‐RO, and Ground‐Based Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Capturing global ionospheric response during extreme geomagnetic storms remains a major observational challenge. During 10–11 May, 2024 superstorm, we investigate the height‐dependent response of the F‐region using multi‐constellation GNSS‐POD limb‐sounding measurements from COSMIC‐2, Spire, PlanetiQ, and FengYun‐3 satellites. Approximately 12,
Nimalan Swarnalingam, Dong L. Wu, Daniel J. Emmons, Cornelius Csar Jude H. Salinas   +3 more
wiley   +1 more source

Radio tomographic imaging of the northern high-latitude ionosphere on a wide geographic scale [PDF]

, 2005
Several chains of receivers, measuring total electron content (TEC) during passes of satellites in the U.S. Navy Ionospheric Measuring System (NIMS), are operated at northern high latitudes by members of the International Ionospheric Tomography Community
Bailey, G.J., Jakowski, N., Fremouw, E., Bust, G., Denton, M.H., Kersley, L., Pryse, Elery, Jakowski, Norbert, Pryse, S.E., Secan, J., Kersley, Len   +10 more
core  

Mesoscale observations of Joule heating near an auroral arc and ion-neutral collision frequency in the polar cap E region [PDF]

, 2011
We report on the first mesoscale combined ionospheric and thermospheric observations, partly in the vicinity of an auroral arc, from Svalbard in the polar cap on 2 February 2010. The EISCAT Svalbard radar employed a novel scanning mode in order to obtain
Wild, J.A., Yiu, I., Kosch, M.J., Anderson, C., I. Yiu, Y. Ogawa, Aruliah, A., Tsuda, T., I. W. McCrea, L. J. Baddeley, S. Nozawa, Howells, V., A. Aruliah, J. A. Wild, McCrea, I.W., V. Howells, Ogawa, Y., Nozawa, S., M. J. Kosch, C. Anderson, Baddeley, L.J., T. Tsuda   +21 more
core   +1 more source

Ionosphere‐Thermosphere Responses to the March 2023 Geomagnetic Storm Using Observations and TIEGCM Simulations Driven by Data Assimilated Aurora and Electric Fields

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract We investigate Ionosphere‐Thermosphere (IT) responses to the March 2023 geomagnetic storm using GOLD and PFISR observations, along with TIEGCM simulations driven by data‐assimilated aurora and electric fields. A Lattice Kriging approach is implemented to assimilate auroral electron flux and characteristic energy from ground‐based (THEMIS/ASIs)
Prakash Poudel, Xian Lu
wiley   +1 more source

Acoustic Wave Heating of the Thermosphere

, 2001
A numerical model is used to study the dissipation in the thermosphere of upward propagating acoustic waves. Whereas dissipating gravity waves can cool the upper atmosphere through the effects of sensible heat flux divergence, it is found that acoustic ...
Schubert, G., G. Schubert, Walterscheid, R. L., M. P. Hickey, R. L. Walterscheid, Hickey, Michael P., Ph.D.   +5 more
core   +1 more source

The dayside high-latitude trough under quiet geomagnetic conditions: Radio tomography and the CTIP model [PDF]

, 2005
International audienceThe dayside high-latitude trough is a persistent feature of the post-noon wintertime auroral ionosphere. Radio tomography observations have been used to map its location and latitudinal structure under quiet geomagnetic conditions ...
Dewis, K. L., Denton, M.H., Pryse, S. E., Balthazor, R. L., Middleton, H. R., Balthazor, R.L., H. R. Middleton, Dewis, K.L., R. L. Balthazor, Denton, M. H., S. E. Pryse, Pryse, S.E., Middleton, H.R., K. L. Dewis, M. H. Denton   +14 more
core   +1 more source

Photodissociation of CO in the thermosphere of Venus

Geophysical Research Letters, 1989
Recent investigations of CO photoabsorption demonstrate that photodissociation longward of the ionization threshold at 88.5 nm occurs primarily through line absorptions rather than continuous processes. We have constructed high resolution photoabsorption cross sections for CO at rotational temperatures near 250 K from the improved data on dissociating ...
J. L. Fox, J. H. Black
openaire   +4 more sources

Gravity Wave Influences on MSTID Climatology Over CONUS: WACCM‐X Year‐Long Simulation and GNSS Long‐Term Observation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) are prominent wave‐like structures in the ionosphere, with complex generation mechanisms involving both atmospheric gravity waves (GWs) and electrodynamic instabilities such as the Perkins instability (PI).
Jing Liu, Shun‐Rong Zhang, Hanli Liu, Anthea J. Coster, Philip J. Erickson   +4 more
wiley   +1 more source

Long-term variations of the upper atmosphere parameters on Rome ionosonde observations and their interpretation

Journal of Space Weather and Space Climate, 2017
A recently proposed self-consistent approach to the analysis of thermospheric and ionospheric long-term trends has been applied to Rome ionosonde summer noontime observations for the (1957–2015) period.
Perrone Loredana, Mikhailov Andrey, Cesaroni Claudio, Alfonsi Lucilla, Santis Angelo De, Pezzopane Michael, Scotto Carlo   +6 more
doaj   +1 more source