Observations of the October Draconid outburst at different latitudes along 120°E

Li, Yang; Li, Guozhu; Hu, Lianhuan; Zhao, Xiukuan; Sun, Wenjie; Xie, Hongqiang; Ning, Baiqi

doi:10.1093/mnras/stac2589

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…However, for completeness, see the references in [50], and note the single-site studies of meteor shower radiant and stream orbits and their errors described in [153,154]. For an example of the application of meteor radar networks to identify radiants and stream orbits see [155]. Routine application of these radars to this topic would add considerably to the existing meteor orbit radars.…”

Section: Discussionmentioning

confidence: 99%

Meteor Radar for Investigation of the MLT Region: A Review

Reid

2024

Atmosphere

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This is an introductory review of modern meteor radar and its application to the measurement of the dynamical parameters of the Mesosphere Lower Thermosphere (MLT) Region within the altitude range of around 70 to 110 km, which is where most meteors are detected. We take a historical approach, following the development of meteor radar for studies of the MLT from the time of their development after the Second World War until the present. The application of the meteor radar technique is closely aligned with their ability to make contributions to Meteor Astronomy in that they can determine meteor radiants, and measure meteoroid velocities and orbits, and so these aspects are noted when required. Meteor radar capabilities now extend to measurements of temperature and density in the MLT region and show potential to be extended to ionospheric studies. New meteor radar networks are commencing operation, and this heralds a new area of investigation as the horizontal spatial variation of the upper-atmosphere wind over an extended area is becoming available for the first time.

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Section: Discussionmentioning

confidence: 99%

Meteor Radar for Investigation of the MLT Region: A Review

Reid

2024

Atmosphere

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Diurnal and Seasonal Variations of Meteor Speed and Arrival Angle Observed by Mengcheng Meteor Radar

Wu,

Yi,

Xue

et al. 2024

JGR Space Physics

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Meteor speed is crucial in identifying key astronomical aspects of the meteoroid environment, including the influx of meteoric material and the distribution of meteoric radiants. This study investigates diurnal and seasonal variations of meteor speed from April 2014 to December 2023 observed by the Mengcheng meteor radar (MCMR; 33.4°N, 116.3°E). In addition to the expected diurnal variation of meteor speed, azimuth peak, zenith peak, and the azimuthal direction of maximum meteor speed due to the Earth's rotation, where the meteor speed peaks northward in the local morning and shifts clockwise, we find that the meteor speed distribution resembles a superposition of two Gaussian distributions, with the lower (higher) distribution mainly ranging from 20 to 40 (45–65) km/s. The two speed peaks are estimated using a double‐Gaussian fitting approach. In terms of seasonal variation, we find that (a) the low‐speed peak indicates a semi‐annual variation cycle, with maxima in June–July and December–January, and minima in February and August; (b) the high‐speed peak indicates an annual variation cycle, with maxima in September–December and minima in March. There is also a correlation between the seasonal variations in the meteor speed peaks and the occurrence of meteor showers. Statistical analysis provides a map of seasonal variations in the intensity, duration, and timing of meteor shower activities, which is supplemental to previous shorter‐duration studies using backscatter meteor radar observations. We also find notable shower events where the meteor counts exceed 45%–97% of the background count on corresponding event dates and speeds.

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Diurnal and Seasonal Variations of Sporadic Meteors Radiant Observed by Meteor Radars

Luo,

Gong,

Zhang

et al. 2024

JGR Space Physics

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Based on data collected from three meteor radars located at Mohe (MH, 53.5°N, 122.3°E), Wuhan (WH, 30.5°N, 114.6°E), and Ledong (LD, 18.4°N, 109.0°E), the diurnal and seasonal variations of the meteor counts, azimuth‐zenith distributions of meteors, and sporadic meteor radiant are investigated. For the diurnal variation, meteor counts typically peak around 4 local time (LT) and reach their lowest levels near 17 LT, and the azimuth of the maximum meteor densities exhibits a clockwise rotation with LT. Such a characteristic is determined to be due to the domination of meteors from the helion direction during the daytime and from the antihelion direction during the nighttime. Additionally, three other meteor sources, north apex, south apex, and north toroidal have contributed to detections across all three radar sites. Distinct seasonal variations in meteor counts and azimuth‐zenith distribution are observed at MH while such variations are less evident at WH and LD. The seasonal variation of the radiant distributions displays significant distinct characteristics among different latitudinal observations. These diurnal and seasonal variations can be well explained by the change in the relative positions of the five meteor sources in the radars' local frame of reference. Our study enhances our ability to predict the characteristics of meteor counts and azimuth‐zenith distributions observed by meteor radar at any given time and location.

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Observations of the October Draconid outburst at different latitudes along 120°E

Cited by 4 publications

References 33 publications

Meteor Radar for Investigation of the MLT Region: A Review

Meteor Radar for Investigation of the MLT Region: A Review

Diurnal and Seasonal Variations of Meteor Speed and Arrival Angle Observed by Mengcheng Meteor Radar

Diurnal and Seasonal Variations of Sporadic Meteors Radiant Observed by Meteor Radars

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