Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017

Hu, Pengfei; Chen, Gang; Li, Guozhu; Yan, Chunxiao; Zhang, Shaodong; Yang, Guotao; Li, Yaxian; He, Zhibin; Wang, Jia; Zhang, Min

doi:10.1029/2022sw003272

Cited by 3 publications

(1 citation statement)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the FAIs on the western wall of Bubble 2 dissipated more slowly than those in other parts. Hu et al (2022) investigate the dissipation process of the daytime F-region FAIs by two adjacent coherent scatter radars, and found the front and bottom edges of the irregularities decayed earlier. In Figure 6, the FAIs on the eastern wall, namely on the front edge, dissipated more rapidly.…”

Section: Discussionmentioning

confidence: 99%

Observations on the Variations of the Field‐Aligned Irregularities in the Plasma Bubbles at Low‐Latitudes of China

Jia,

Chen,

et al. 2023

JGR Space Physics

Self Cite

View full text Add to dashboard Cite

The concurrent observation of the Hainan COherent Scatter Phased Array Radar (HCOPAR) and the 630 nm all‐sky airglow imager was carried out on the night of 13 April 2015 in low‐latitudes of China. The plasma bubble recorded by the airglow imager and the Field‐Aligned Irregularities (FAIs) observed by the HCOPAR kept a good consistency. At the beginning, the FAIs were found to fill the entire plasma bubble, and they were drifting eastward together. During the dissipation process, the plasma bubble became wider and wider in zonal direction, while the airglow gray gradient on the eastern and western walls of the bubble had no much changes. Simultaneously, the echo Signal‐to‐Noise Ratio (SNR) of the irregularities in the bubble became lower and lower. The SNR at the depletion center decreased fastest, and the SNR of the FAIs on the western wall of the bubble fell more slowly than those in other parts. Polarization electric field in the bubble is suggested to have influence on the distribution of the FAIs. Gradient drift instability on the western wall supported the FAIs to live longer, and the FAIs on the eastern wall, namely on the front edge of the bubble, dissipated more rapidly.

show abstract

Section: Discussionmentioning

confidence: 99%

Observations on the Variations of the Field‐Aligned Irregularities in the Plasma Bubbles at Low‐Latitudes of China

Jia,

Chen,

et al. 2023

JGR Space Physics

Self Cite

View full text Add to dashboard Cite

show abstract

Stripe‐Like Echoes Scattered From Nighttime F‐Region Field‐Aligned Irregularities at Low‐Latitudes

Jia,

Chen,

Yan

et al. 2024

JGR Space Physics

View full text Add to dashboard Cite

The unusual stripe‐like scattered echoes were observed by the Hainan Coherent Scatter Phased Array Radar (HCOPAR) in the nigh of 9 Sep. 2017. There were parallel stripes with the interval of ∼33 min appearing from 12:57 to 17:50 UT. While the emergence of the scattered echoes, the Hainan Digisonde has observed the Spread‐F, and the Total Electron Content (TEC) maps recorded by the Global Navigation Satellite System (GNSS) in China show that there was no Equatorial Plasma Bubble (EPB), but the Medium‐Scale Traveling Ionospheric Disturbance (MSTID) traveled southwestward. The spatial and temporal distributions of the stripe‐like echoes and the MSTID show great consistency, indicating that the F‐region Field‐Aligned Irregularities were generated in the wave peaks and troughs of the MSTID. The MSTID has decayed greatly while reaching the HCOPAR, and the echo pattern is determined by the wave features of the MSTID.

show abstract

Study of the Long-Lasting Daytime Field-Aligned Irregularities in the Low-Latitude F-Region on 13 June 2022

Hu,

Chen,

Yan

et al. 2024

Remote Sensing

View full text Add to dashboard Cite

The unusual daytime F-region Field-Aligned Irregularities (FAIs) were observed by the HCOPAR and the satellites at low latitudes on 13 June 2022. These irregularities survived from night-time to the following afternoon at 15:00 LT. During daytime, they appeared as fossil structures with low Doppler velocities and narrow spectral widths. These characteristics indicated that they drifted along the magnetic field lines without apparent zonal velocity to low latitudes. Combining the observations of the ICON satellite and the Hainan Digisonde, we derived the movement trails of these daytime irregularities. We attributed their generation to the rapid ascent of the F-layer due to the fluctuation of IMF Bz during the quiet geomagnetic conditions. Subsequently, the influence of the substorm on the low-latitude ionosphere was investigated and simulated. The substorm caused the intense Joule heating that enhanced the southward neutral winds, carrying the neutral compositional disturbances to low latitudes and resulting in a negative storm effect in Southeast Asia. The negative storm formed a low-density circumstance and slowed the dissipation of the daytime FAIs. These results may provide new insights into the generation of post-midnight irregularities and their relationship with daytime fossil structures.

show abstract

Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017

Cited by 3 publications

References 59 publications

Observations on the Variations of the Field‐Aligned Irregularities in the Plasma Bubbles at Low‐Latitudes of China

Observations on the Variations of the Field‐Aligned Irregularities in the Plasma Bubbles at Low‐Latitudes of China

Stripe‐Like Echoes Scattered From Nighttime F‐Region Field‐Aligned Irregularities at Low‐Latitudes

Study of the Long-Lasting Daytime Field-Aligned Irregularities in the Low-Latitude F-Region on 13 June 2022

Contact Info

Product

Resources

About