Traveling ionospheric disturbances detected in the FRONT Campaign

Saito, Akinori; Nishimura, Maiko; Yamamoto, M.; Fukao, S.; Kubota, Minoru; Shiokawa, K.; Otsuka, Yuichi; Tsugawa, Takuya; Ogawa, T.; Ishii, Mamoru; Sakanoi, Takeshi; Miyazaki, S.

doi:10.1029/2000gl011884

Cited by 128 publications

(162 citation statements)

References 14 publications

Supporting

Mentioning

156

Contrasting

Order By: Relevance

“…Therefore, the time delay between the appearance of Es and QF does not necessarily represent the time required for the establishment of the instability that causes the spread-F development. In this regard, Yokoyama et al (2009) reported that during the most favorable condition, the coupled EsPerkins instability takes 700 s (∼ 12 min) to generate variations sufficient to account for the observed airglow and GPS-TEC perturbations by Saito et al (2001). Thus, the foEs averaged during a 1 h interval before QF may have little correlation with QF.…”

Section: Discussionmentioning

confidence: 99%

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya

Zhang

Wan

et al. 2015

Ann. Geophys.

View full text Add to dashboard Cite

Abstract. We analyze the data recorded during December 2011-November 2012 by a digital ionosonde and a GPS (Global Positioning System) scintillation and (total electron content) TEC receiver collocated at Sanya (109.6 • E, 18.3 • N; dip lat. 12.8 • N), a low-latitude station in the Chinese longitude sector, to carry out a comparative study of ionospheric scintillations and spread F. A good consistency between the temporal variations of GPS scintillation (represented by the S4 index) and of ionogram spread F (represented by the QF index) is found in the pre-midnight period during equinox. However in the post-midnight period during equinox and in the period from post-sunset to presunrise during June solstice, moderate spread F is seen without concurrent GPS scintillation. The possible cause responsible for the difference between post-midnight GPS scintillation and spread F during equinox could be due to the decaying of 400 m scale irregularities associated with equatorial spread F. Regarding the irregularities producing moderate QF and low S4 indices during June solstice, we suggest that the frequently observed sporadic E (Es) layer and the medium-scale traveling ionospheric disturbances (MSTIDs) over Sanya could play important roles in triggering the June solstitial spread-F events.

show abstract

Section: Discussionmentioning

confidence: 99%

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya

Zhang

Wan

et al. 2015

Ann. Geophys.

View full text Add to dashboard Cite

show abstract

“…This dense distribution of GPS receivers is suitable to study spatial structures and the temporal evolution of TEC perturbations in detail. The high resolution TEC maps over Japan have been derived with GEONET data since 1997 (Saito et al, 1998(Saito et al, , 2001. Otsuka et al (2002) developed a new technique to derive the absolute values of vertical TEC, in which a weighted least-squares fitting is used to determine unknown instrumental biases, assuming that the hourly TEC average is uniform within an area covered by a GPS receiver.…”

Section: Observations and Methods Of Analysismentioning

confidence: 99%

Transition region of TEC enhancement phenomena during geomagnetically disturbed periods at mid-latitudes

et al. 2005

Self Cite

View full text Add to dashboard Cite

show abstract

“…All sky images (e.g. Garcia et al, 2000;Kubota et al, 2001;Saito et al, 2001;Shiokawa et al, 2003) and GPS time delay (e.g. Saito et al, 1998;Tsugawa et al, 2007) show nighttime F layer structure with a clear statistical tendency to form fronts elongated from northwest to southeast (Northern Hemisphere), and generally propagating to the southwest.…”

Section: Introductionmentioning

confidence: 99%

Wavelength dependence of the <I>E<sub>s</sub></I> layer instability, and of coupling to the F layer, in the nonlinear regime

Cosgrove

2008

Ann. Geophys.

View full text Add to dashboard Cite

Abstract. The E s layer instability has been suggested as a participant in the creation of frontal structures observed in both the E s and F layers of the nighttime midlatitude ionosphere, in spite of the fact that the spatial scales of the frontal structures are very different in the two layers. The linear growth rate of the instability has a maxima in the vicinity of the wavelength observed for the E s layer structures (short wavelengths). However, the maxima is non-distinct, and simulations have shown that the instability is extremely nonlinear. Therefore, to understand the wavelength dependence of the E s layer instability it is necessary to factor in nonlinear behavior. Simulations have shown that the instability is active at the wavelengths observed in the F layer, and revealed that the E s layer behavior at these long wavelengths is so nonlinear that the common, highly localized E s layer observation techniques would likely miss the signature, which is highly visible in the F layer. However, there is currently no explanation for why long wavelengths so clearly dominate short (or intermediate) wavelengths in the F layer observations, and this is a weakness in arguments that the E s layer instability participates in the creation of F-region frontal structures. Herein we remove this weakness by showing that longer wavelengths grow to larger amplitudes before eventual nonlinear saturation, and couple more effectively to the F-region.

show abstract

Traveling ionospheric disturbances detected in the FRONT Campaign

Cited by 128 publications

References 14 publications

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya

Transition region of TEC enhancement phenomena during geomagnetically disturbed periods at mid-latitudes

Wavelength dependence of the <I>E<sub>s</sub></I> layer instability, and of coupling to the F layer, in the nonlinear regime

Contact Info

Product

Resources

About

Traveling ionospheric disturbances detected in the FRONT Campaign

Cited by 128 publications

References 14 publications

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya

Transition region of TEC enhancement phenomena during geomagnetically disturbed periods at mid-latitudes

Wavelength dependence of the &lt;I&gt;E&lt;sub&gt;s&lt;/sub&gt;&lt;/I&gt; layer instability, and of coupling to the F layer, in the nonlinear regime

Contact Info

Product

Resources

About

Wavelength dependence of the <I>E<sub>s</sub></I> layer instability, and of coupling to the F layer, in the nonlinear regime