Hainan Coherent Scatter Phased Array Radar (HCOPAR): System Design and Ionospheric Irregularity Observations

Chen, Gang; Jin, Hui; Yan, Jingye; Cui, Xianze; Zhang, Shaodong; Yan, Chunxiao; Yang, Guotao; Lan, Ailan; Gong, Wanlin; Qiao, Lei; Wu, Chen; Jin, Wang

doi:10.1109/tgrs.2017.2699280

Cited by 29 publications

(28 citation statements)

References 37 publications

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“…The E region observations are rather similar to the midlatitude E region FAIs observed by the MU radar, Japan. Thus, the lower E region observation of CUSAT radar is supporting the conclusion put forward by Chen et al (), that the low‐latitude E region FAIs appear similar to the midlatitude echoes than those from the magnetic equator.…”

Section: Discussionsupporting

confidence: 87%

Detection of Submeter Scale Irregularities in the Low‐Latitude Ionospheric E Layer Using High VHF Radar at 205 MHz

et al. 2019

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A preliminary study on the first‐time observation of the submeter‐scale disturbances in the ionospheric E layer above the near‐equatorial site of Cochin (10.04°N, 76.33°E; Declination: −1°37′, Inclination: 7°2′), India, using an atmospheric radar in the high very high frequency range at 205 MHz has been carried out. Selected cases of E layer disturbances observed in the 90‐ to 105‐km altitude region, during summer, equinox, and winter periods are reported. It is noted that the submeter‐scale disturbances exist in the near‐equatorial E region with a life span of few minutes to several hours. Both continuous and intermittent echoes were seen in the 90‐ to 105‐km region. The continuous irregularities remain at constant altitude initially, descend and vanish in the later stage. The E layer irregularities observed in the morning and noon were continuous, whereas the echoes after the late afternoon were quasiperiodic in nature with a lifetime of 10–15 min. However, no apparent mean Doppler is observed during this period and is expected to be associated with a turbulent cascade from long wavelengths to shorter ones.

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Section: Discussionsupporting

confidence: 87%

Detection of Submeter Scale Irregularities in the Low‐Latitude Ionospheric E Layer Using High VHF Radar at 205 MHz

et al. 2019

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“…It is one of the most important radio systems of Chinese Meridian Project (Wang, ). It operates at 47 MHz with 54‐kW peak power and 2‐MHz bandwidth to detect the 3.2‐m‐scale field‐aligned irregularities in the low‐latitude ionosphere (G. Chen et al, ). Its antenna array consisted of 18 ×4 five‐element linear‐polarized Yagi antennas covering an area of 2,000 m 2 .…”

Section: Instrumentsmentioning

confidence: 99%

Formation and Evolution of Low‐Latitude F Region Field‐Aligned Irregularities During the 7–8 September 2017 Storm: Hainan Coherent Scatter Phased Array Radar and Digisonde Observations

et al. 2018

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In this paper, we present a study of the low‐latitude field‐aligned irregularities formation and evolution during the 7–8 September 2017 geomagnetic storm by analyzing data of the very high frequency coherent radar installed at Fuke, Hainan Island of China (19.5°N, 109.1°E; magnetic latitude 9.58°N) and a colocated Digisonde Portable Sounder. The prompt penetration of eastward interplanetary electric field associated with sudden southward turning of the interplanetary magnetic field Bz resulted in large ascent of the F layer, making conducive conditions at the bottomside of the layer for the growth of Rayleigh‐Taylor instability and the development of the plasma irregularities in the postsunset hours. The irregularities persisted into the postmidnight sector when the southward interplanetary magnetic field Bz gradually decreased to the quiet time values. In addition, the base height of F layer at Fuke also showed a large elevation after midnight during two consecutive substorm onsets, suggesting that the substorm‐induced overshielding penetration electric field may take over and modify the ambient zonal electric field in low‐latitude ionosphere and induce the irregularities in the postmidnight sector. Moreover, different from the quiet time eastward movement of the irregularities observed over Fuke, the storm time irregularities displayed no zonal drift at the initial period and subsequently began drifting westward. The reversal of background plasma zonal drift velocity observed by Hainan digisonde characterized the storm time zonal drift pattern of the irregularities.

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“…Since the ionosphere is significantly dominated by solar and geomagnetic activity, it is very difficult to isolate and study effects on the ionosphere driven by such geophysical phenomena as earthquakes, typhoons, and tropical cyclones. Chen Z et al (2017a, b) used the spectral whitening method (SWM) to extract the effects of such geomagnetic activity on TEC. Their analysis shows that the SWM can clean up background variations in TEC and effectively extract effects of geomagnetic activity.…”

Section: Ionospheric Space Weathermentioning

confidence: 99%

“…Their work indicates that SWM may be a potential method to study the ionospheric effects of some weak geophysical driving sources. Based on successful application of SWM to f o F 2 , Chen Z et al (2017b) used SWM to process TEC. By analyzing the spatial correlation of the disturbance field with F 10.7 and Ap , their work illustrates that SWM can significantly reduce the effects of solar activity and enhance those of geomagnetic activity (as shown in Figure 5).…”

Section: Ionospheric Space Weathermentioning

confidence: 99%

“…The Hainan coherent scatter phased array radar (HCOPAR) is one of the most important radio systems of the Chinese Meridian Space Weather Monitoring Project (Meridian Project) (Chen G et al, 2017b). The radar is located at Fuke station (19.5°N, 109.1°E, dip latitude 8.1°N), Hainan island, China, in order to observe the field‐aligned irregularities in ionospheric E‐ and F‐regions.…”

Section: Global Navigation Satellite System (Gnss) Related Issues Andmentioning

confidence: 99%

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Chinese ionospheric investigations in 2016–2017

Liu

Wan

2018

Earth and Planetary Physics

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After the release of the previous report to the Committee on Space Research (COSPAR) on progress achieved by Chinese scientists in ionospheric researches (Liu LB and Wan WX, 2016), in the recent two years (2016–2017) many interesting new investigations into various ionospheric related issues have been completed. In this report, about 100 publications are summarized. The topics highlighted are as follows: Ionospheric space weather, ionospheric dynamics, ionospheric climatology and modelling, ionospheric irregularity and scintillation, Global Navigation Satellite System (GNSS) related ionospheric issues and other techniques, and radio wave propagation in the ionosphere. An outstanding feature is that more and more observations from the Meridional Project supported the ionospheric investigations.

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Hainan Coherent Scatter Phased Array Radar (HCOPAR): System Design and Ionospheric Irregularity Observations

Cited by 29 publications

References 37 publications

Detection of Submeter Scale Irregularities in the Low‐Latitude Ionospheric E Layer Using High VHF Radar at 205 MHz

Detection of Submeter Scale Irregularities in the Low‐Latitude Ionospheric E Layer Using High VHF Radar at 205 MHz

Formation and Evolution of Low‐Latitude F Region Field‐Aligned Irregularities During the 7–8 September 2017 Storm: Hainan Coherent Scatter Phased Array Radar and Digisonde Observations

Chinese ionospheric investigations in 2016–2017

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