A Comparison of Fabry–Perot Interferometer and Meteor Radar Wind Measurements Near the Polar Mesopause Region

Lee, Chang-Sup; Jee, Geonhwa; Kam, Hosik; Wu, Qian; Ham, Young‐Bae; Kim, Yong Ha; Kim, Jeong‐Han

doi:10.1029/2020ja028802

Cited by 8 publications

(5 citation statements)

References 48 publications

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“…The first is that the intercepts are close to zero. The second is that ERWIN consistently measures winds that are on average factors of 0.6 to 0.7 of those of the MWR, a result that has also been noted in recent Fabry-Perot, MWR comparisons [Yu et al (2017); Lee et al (2021)].…”

Section: Discussionmentioning

confidence: 55%

Wind comparisons between meteor radar and Doppler shifts in airglow emissions using field widened Michelson interferometers

Kristoffersen,

Ward,

Meek

2023

Preprint

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Abstract. Winds from two co-located two wind measuring instruments, a meteor radar and field widened Michelson interferometer at the Polar Environment Atmospheric Research Laboratory in Eureka, Nu, Canada (80° N, 86° W) are compared. The two instruments have very different temporal and spatial observational footprints. ERWIN provides airglow weighted winds from three nightglow emissions (O(1S) (oxygen green line, 557.7 nm), an O2 line (866 nm), and an OH line (843 nm)) on a ∼5 minute cadence for measurements at all three heights. As with Fabry-Perot airglow wind observations, these winds are airglow weighted winds from volumes of ∼8 km in height by ∼5 km radius. ERWIN’s higher accuracy (1–2 m/s for the O(1S) and OH emissions and ∼4 m/s for the O2 emissions) and higher cadence allows more detailed wind comparisons of airglow and radar winds than previously possible. The best correlation is achieved using Gaussian weighting of meteor radar winds with peak height and vertical width being optimally determined. Peak heights agree well with co-located SABER airglow observations. Offsets between the two instruments are ∼ 1–2 m/s for the O2 and O(1S) emissions and less than 0.3/s for the OH emission. Wind direction are highly correlated with a ∼ 1:1 correspondence. On average meteor radar wind magnitudes are ∼ 40 % larger than those from ERWIN. Gravity wave airglow brightness weighting of observations is discussed. Non-quadrature phase offsets between the airglow weighting and gravity wave associated wind and temperature perturbations will result in enhanced or reduced layer weighted wind amplitudes.

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Section: Discussionmentioning

confidence: 55%

Wind comparisons between meteor radar and Doppler shifts in airglow emissions using field widened Michelson interferometers

Kristoffersen,

Ward,

Meek

2023

Preprint

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“…Lee et al [30] compared the winds at the two altitudes of 87 and 97 km retrieved by using the OH and OI emissions observed by the FPI and MR at King Sejong Station in Antarctica (62.22 • S, 58.79 • W), and they suggested that the two wind measurements agree well. In addition, Gu et al [31] conducted a comparison between the winds at 87 km observed by the Kunming FPI (OH emission) and the 53.1 MHz MR and similarly indicated a good correlation between the two techniques; moreover, they also reported that the FPI estimates were smaller than the MR measurements by about 30%, and the bias was larger than for MF radar winds.…”

Section: Discussionmentioning

confidence: 99%

Comparison between the Mesospheric Winds Observed by Two Collocated Meteor Radars at Low Latitudes

Zeng

Xue

et al. 2022

Remote Sensing

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This study compares the hourly mesospheric horizontal winds observed by two collocated and independent low-latitude meteor radars operating at 37.5 MHz and 53.1 MHz in Kunming, China (25.6°N, 103.8°E). Upon analyzing simultaneously detected meteor echoes, we find a fixed angular deviation between the baselines of the two meteor radar antenna arrays within the east–north–up coordinate system. Then, we correct the deviation in the antenna azimuth direction using a novel method and recalculate the horizontal zonal and meridional winds. A comparison of the results before and after the correction shows strong consistency between the winds observed by both meteor radars within the entire detection altitude range. Furthermore, we summarize the performance of different techniques for measuring mesospheric winds. Ultimately, our statistical analysis approach allows the uncertainties associated with meteor radar wind observations to be more precisely estimated.

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“…Meteor radars on the ground have been equipped to measure neutral winds and temperature in the lower part of the MLT region (Beard et al., 1997; Beldon & Mitchell, 2010; Day & Mitchell, 2010; Huang et al., 2013; Kam et al., 2021; C. Lee et al., 2021). Meteoroids entering the Earth's atmosphere leave ionization trails, and meteor radars detect backscattering echoes of transmitted radio signals from meteor trails.…”

Section: Introductionmentioning

confidence: 99%

“…Meteor radars on the ground have been equipped to measure neutral winds and temperature in the lower part of the MLT region (Beard et al, 1997;Beldon & Mitchell, 2010;Day & Mitchell, 2010;Huang et al, 2013;Kam et al, 2021;C. Lee et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Vertical Wind Profiles in the Mesosphere and Lower Thermosphere Driven by Meteor Radar and Ionospheric Connection Explorer Observations Over the Korean Peninsula

Lee,

Kwak,

Kam

et al. 2024

Geophysical Research Letters

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Meteor radar observations provide wind data ranging from 80 to 100 km altitude, while the Michaelson Interferometer for Global High‐resolution Thermospheric Imaging (MIGHTI) onboard the Ionospheric Connection Explorer satellite offers wind data above 90 km altitude. This study aims to generate wind profiles in the mesosphere and lower thermosphere by combining the winds derived from meteor radar and MIGHTI observations over the Korean Peninsula from January 2020 to December 2021. The wind profiles derived from the two instruments are continuous at night, but they show discrepancies during the day. The atomic oxygen 557.7 nm (green line) emission intensity measured by MIGHTI peaks at approximately 100 km during the day and 94 km at night. The vertical gradient of the airglow volume emission rate is more pronounced during the day. These differences can cause day‐night differences in the MIGHTI wind retrieval accuracy, potentially leading to discrepancies during the day.

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A Comparison of Fabry–Perot Interferometer and Meteor Radar Wind Measurements Near the Polar Mesopause Region

Abstract: The FPI can provide reliable height-averaged winds even under a strong wind shear near the mesopause region.

Cited by 8 publications

References 48 publications

Wind comparisons between meteor radar and Doppler shifts in airglow emissions using field widened Michelson interferometers

Wind comparisons between meteor radar and Doppler shifts in airglow emissions using field widened Michelson interferometers

Comparison between the Mesospheric Winds Observed by Two Collocated Meteor Radars at Low Latitudes

Vertical Wind Profiles in the Mesosphere and Lower Thermosphere Driven by Meteor Radar and Ionospheric Connection Explorer Observations Over the Korean Peninsula

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