scholarly journals Tidal Effects on the Longitudinal Structures of the Martian Thermosphere and Topside Ionosphere Observed by MAVEN

2020 ◽  
Author(s):  
Xiaohua Fang ◽  
Jeffrey M. Forbes ◽  
Quan Gan ◽  
Guiping Liu ◽  
Scott Thaller ◽  
...  
Keyword(s):  
Topside Ionosphere ◽  
Tidal Effects ◽  
Longitudinal Structures

scholarly journals Looking for a proxy of the ionospheric turbulence with Swarm data

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Paola De Michelis ◽  
Giuseppe Consolini ◽  
Alessio Pignalberi ◽  
Roberta Tozzi ◽  
Igino Coco ◽  
...  
Keyword(s):  
Electron Density ◽  
Geomagnetic Activity ◽  
Density Fluctuations ◽  
Rate Of Change ◽  
Topside Ionosphere ◽  
Joint Probability Distribution ◽  
Activity Levels ◽  
Scaling Exponents ◽  
Electron Density Fluctuations ◽  
Scaling Features

AbstractThe present work focuses on the analysis of the scaling features of electron density fluctuations in the mid- and high-latitude topside ionosphere under different conditions of geomagnetic activity. The aim is to understand whether it is possible to identify a proxy that may provide information on the properties of electron density fluctuations and on the possible physical mechanisms at their origin, as for instance, turbulence phenomena. So, we selected about 4 years (April 2014–February 2018) of 1 Hz electron density measurements recorded on-board ESA Swarm A satellite. Using the Auroral Electrojet (AE) index, we identified two different geomagnetic conditions: quiet (AE < 50 nT) and active (AE > 300 nT). For both datasets, we evaluated the first- and second-order scaling exponents and an intermittency coefficient associated with the electron density fluctuations. Then, the joint probability distribution between each of these quantities and the rate of change of electron density index was also evaluated. We identified two families of plasma density fluctuations characterized by different mean values of both the scaling exponents and the considered ionospheric index, suggesting that different mechanisms (instabilities/turbulent processes) can be responsible for the observed scaling features. Furthermore, a clear different localization of the two families in the magnetic latitude—magnetic local time plane is found and its dependence on geomagnetic activity levels is analyzed. These results may well have a bearing about the capability of recognizing the turbulent character of irregularities using a typical ionospheric plasma irregularity index as a proxy.

scholarly journals From amplitudes to gravitational radiation with cubic interactions and tidal effects

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
Manuel Accettulli Huber ◽  
Andreas Brandhuber ◽  
Stefano De Angelis ◽  
Gabriele Travaglini
Keyword(s):  
Gravitational Radiation ◽  
Tidal Effects

Anomalous features of the electron density in the topside ionosphere

1969 ◽  
Vol 311 (1507) ◽  
pp. 501-516 ◽  
Keyword(s):  
Electron Density ◽  
Power Supply ◽  
Data Rate ◽  
Power Lines ◽  
Topside Ionosphere ◽  
Telemetry Data ◽  
Electron Density And Temperature

The instruments which measure electron density and temperature are quite separate and independent in operation, but on account of the limitations in power supply and telemetry data rate the two experiments share the same power lines and some data channels.

Ion outflows and artificial ducts in the topside ionosphere at HAARP

2010 ◽  
Vol 37 (18) ◽  
pp. n/a-n/a ◽  
Author(s):  
G. M. Milikh ◽  
E. Mishin ◽  
I. Galkin ◽  
A. Vartanyan ◽  
C. Roth ◽  
...  
Keyword(s):  
Topside Ionosphere

Estimation and Removal of Tidal Effects From Pressure Data

SPE Journal ◽  
2009 ◽  
Vol 14 (01) ◽  
pp. 144-152 ◽  
Author(s):  
Yong Zhao ◽  
Albert C. Reynolds
Keyword(s):  
Pressure Data ◽  
Tidal Effects
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