Results 91 to 100 of about 1,720 (206)

Detection of 2D features in MARSIS ionogram pictures

, 2013
The work focuses on techniques for finding significant features in ionograms captured by the MARSIS instrument onboard the Mars Express spacecraft. Identification of these features helps in studying the ionosphere, magnetosphere and plasma surrounding ...
Pecka, Martin
core  

Datasets for airglow image data and ionogram data obtained from Zhuhai Station (113.58°E, 22.35°N) on April 3, 2022.

<p>This dataset contains airglow image data (airglow_image.mat) and ionogram data (ionogram_data.mat) obtained from Zhuhai Station (113.58°E, 22.35°N) on April 3, 2022. The airglow images ranged from 12:30-20:04 UT.
Zhong, Jiahao, Song, Xingyan
core   +1 more source

Enhancing the ISIS-I Topside Digital Ionogram Database [PDF]

, 2018
Selected original analog telemetry tapes from three of the topside-sounder satellites of theInternational Satellites for Ionospheric Studies (ISIS) program, namely Alouette 2, ISIS I, and ISIS II, wereused in an earlier project to produce more than ...
Benson, Robert F., Fung, Shing F., Wang, Yongli, Bilitza, Dieter, Truhlik, Vladimir   +4 more
core  

Deep Neural Network-Based Inversion Method for Electron Density Profiles in Ionograms

Atmosphere
Accurate inversion of ionograms of the ionosonde is of great significance for studying ionospheric structure and radio wave propagation. Traditional inversion methods usually describe the electron density profile based on preset polynomial functions, but
Longlong Niu, Chen Zhou, Na Wei, Guosheng Han, ZhongXin Deng, Wen Liu   +5 more
doaj   +1 more source

Influence of Non-vertical Echoes to Ionogram Scaling

, 2011
Digisonde DPS 4 replaced the older ionosonde IPS 42 KEL Aerospace in the Observatory Pruhonice in January 2004. Additional information about the wave polarization enables us to determine and to distinguish exactly between ordinary and extraordinary wave ...
Kouba, Daniel
core  

Observations on the variability and screening effect of sporadic-E [PDF]

, 2009
Honary, F., Ritchie, S.E.
core   +4 more sources

Disturbances in the minimum frequency of ionogram echoes and upper atmospheric temperature during winter sudden stratospheric warmings from the measurements in Eastern Siberia

We present the results of studying of disturbances in the minimum frequency of ionogram echoes (fmin) and the temperature of the atmosphere at the heights of the upper mesosphere and lower thermosphere (MLT) during the winter sudden stratospheric ...
K.G. Ratovsky, I.V. Medvedeva
core   +1 more source

Satellite Traces: Ionogram Signatures of Bottom‐Side Upwelling Structures ‐ A Simulation Study

Geophysical Research Letters
Satellite Traces (STs) are the important ionogram signatures for the presence of upwellings in the bottom‐side ionosphere, which provide the necessary seed perturbation for the development of equatorial plasma bubbles (EPBs).
M. Ankita, S. Tulasi Ram, T. Yokoyama, R. T. Tsunoda, A. P. Dimri, S. Mondal, Chinmaya Nayak   +6 more
doaj   +1 more source

On new detailed ionogram signatures of Equatorial Plasma Bubbles from non-equatorial station during low solar activity [PDF]

, 2015
A first - time direct comparison between climatology of spread F (SF) observed at Phu Thuy and DMSP, C/NOFS satellite measurements during years of low solar activity conditions 2007 - 2010, together with ionosonde observations under the same solar ...
Trang, Nguyen Thu, Minh, Le Huy, Tsunoda, Roland T.   +2 more
core   +1 more source

A case report of coexistence of acute appendicitis and Meckel's diverticulitis causing generalized acute peritonitis. [PDF]

Int J Surg Case Rep
Plante PR, Essobiyou BT, Sorsy KE, Messier M, Dubreuil G.   +4 more
europepmc   +1 more source