Coordinated observations of F region 3 m field‐aligned plasma irregularities associated with medium‐scale traveling ionospheric disturbances

2016 ◽  
Vol 121 (4) ◽  
pp. 3750-3766 ◽  
Author(s):  
F. F. Lin ◽  
C. Y. Wang ◽  
C. L. Su ◽  
K. Shiokawa ◽  
S. Saito ◽  
...  
Keyword(s):  
Ionospheric Disturbances ◽  
Plasma Irregularities ◽  
Medium Scale ◽  
Traveling Ionospheric Disturbances ◽  
F Region

Characteristics of daytime medium scale traveling ionospheric disturbances (MSTIDs) as observed by SWARM

2020 ◽  
Author(s):  
Chinmaya Nayak ◽  
Stephan Buchert
Keyword(s):  
Electron Density ◽  
Ionospheric Disturbances ◽  
Magnetic Fluctuations ◽  
Low Latitude ◽  
Plasma Irregularities ◽  
Medium Scale ◽  
Traveling Ionospheric Disturbances ◽  
Spatio Temporal ◽  
Low Latitude Ionosphere ◽  
Rule Out

<p><span>This paper studies the daytime medium scale traveling ionospheric disturbances (MSTIDs) in the mid- and low-latitude ionosphere for a period of nearly half a solar cycle (2014-2019) using SWARM observations. We specifically focus on daytime MSTIDs to rule out any contribution from nighttime plasma irregularities. Fluctuations in electron density are primarily used to identify the MSTIDs. These wave like structures are independently observed in both electron density and magnetic fluctuations, although they do not always show one to one correlation. In most cases, the structures are observed by both satellite ‘A’ and ‘C’, suggesting that their zonal extent is more than 140 km. The study makes an attempt to understand and explain the magnetic conjugate nature of the MSTIDs. To have a better understanding of the dynamics of the MSTIDs, ground based GPS-TEC and ionosonde data has been used on case to case basis, wherever available. Additionally, spatio-temporal statistics of MSTID distribution is presented. </span></p>

scholarly journals Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances

2007 ◽  
Vol 25 (10) ◽  
pp. 2185-2194 ◽  
Author(s):  
S. Saito ◽  
M. Yamamoto ◽  
H. Hashiguchi ◽  
A. Maegawa ◽  
A. Saito
Keyword(s):  
Observational Evidence ◽  
Ionospheric Disturbances ◽  
Gps Receiver ◽  
Interferometric Imaging ◽  
Geomagnetic Field Line ◽  
Medium Scale ◽  
Traveling Ionospheric Disturbances ◽  
F Region ◽  
Mu Radar ◽  
E Region

Abstract. We have found that quasi-periodic (QP) echoes in the E region were well defined when medium scale traveling ionospheric disturbances (MSTIDs) in the F region were present. The appearance and disappearance of the MSTIDs observed with the dense GPS receiver network are well correlated with the development and decay of QP echoes observed with the Middle-and-Upper atmosphere (MU) radar. Interferometric imaging of the QP echoes obtained using the MU radar shows that bands of echoing regions aligned northwest to southeast drift southwestward, and their wavefront and propagation direction are the same as those of MSTIDs. This result confirms the expectation of Hysell et al. (2002) who observed band structures in QP echoes by using the MU radar and suggested their relation to MSTIDs. We found observational evidence that the midlatitude E- and F regions are coupled through the geomagnetic field line, although we could not clearly ascertain which of the two regions is the source.

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