On the possibility of determining the sawtooth location from impurity ion density profiles

1995 ◽  
Vol 66 (1) ◽  
pp. 505-507 ◽  
Author(s):  
D. Kh. Morozov ◽  
V. A. Rantsev‐Kartinov
Keyword(s):  
Density Profiles ◽  
Ion Density ◽  
Impurity Ion

Seismo-ionospheric precursors of the 14 November 2019 M7.1 Indonesia Earthquake detected by FORMOSAT-7/COSMIC-2

2020 ◽  
Author(s):  
Jann-Yenq Liu ◽  
Chi-Yen Lin ◽  
Fu-Yuan Chang ◽  
Yuh-Ing Chen
Keyword(s):  
Electron Density ◽  
Electric Fields ◽  
Radio Occultation ◽  
Electron Content ◽  
Ion Temperature ◽  
Density Profiles ◽  
Ion Density ◽  
Total Electron ◽  
Ion Velocity ◽  
Electron Density Profiles

<p>FORMOSAT-7/COSMIC-2 (F7/C2), with the mission orbit of 550 km altitude, 24-deg inclination, and a period of 97 minutes, was launched on 25 June 2019.  Tri-GNSS Radio occultation System (TGRS), Ion Velocity Meter (IVM), and RF beacon onboard F7/C2 six small satellites allow scientists to observe the plasma structure and dynamics in the mid-latitude, low-latitude, and equatorial ionosphere in detail.  F7/C2 TGRS sounds ionospheric RO (radio occultation) electron density profiles, while F7/C2 IVM probes the ion density, ion temperature, and ion velocity at the satellite altitude.  The F7/C2 electron density profiles and the ion density, ion temperature, and ion velocity, as well as the global ionospheric map (GIM) of the total electron content (TEC) derived from global ground-based GPS receivers are used to detect seismo-ionospheric precursors (SIPs) of the 14 November 2019 M7.1 Indonesia Earthquake.  The GIM TEC and F7/C2 RO NmF2 significantly increase specifically over the epicenter on 25-26 October, which indicates SIPs of the 14 November 2019 M7.1 Indonesia Earthquake being detected.  The F7/C2 RO electron density profiles upward motions suggest that the eastward electric fields have been enhanced during the SIP days of the 2019 M7.1 Indonesia earthquake.  The seismo-generated electric fields of the 2019 M7.1 Indonesia earthquake are 0.34-0.64 mV/m eastward.  The results demonstrate that F7/C2 can be employed to detect SIPs in the ionospheric plasma, which shall shed some light on earthquake prediction/forecast.</p>

scholarly journals Impurity ion density measurements at the plasma edge of ASDEX Upgrade using lithium beam charge exchange spectroscopy

2006 ◽  
Vol 77 (3) ◽  
pp. 033507 ◽  
Author(s):  
E. Wolfrum ◽  
J. Schweinzer ◽  
M. Reich ◽  
L. D. Horton ◽  
C. F. Maggi
Keyword(s):  
Charge Exchange ◽  
Plasma Edge ◽  
Ion Density ◽  
Density Measurements ◽  
Exchange Spectroscopy ◽  
Impurity Ion

Boundary-layer ion density profiles as measured by electrostatic probes.

AIAA Journal ◽  
1967 ◽  
Vol 5 (1) ◽  
pp. 91-98 ◽  
Author(s):  
H. R. BREDFELDT ◽  
W. E. SCHARFMAN ◽  
H. GUTHART ◽  
T. MORITA
Keyword(s):  
Boundary Layer ◽  
Density Profiles ◽  
Ion Density
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