Radar observations of meteor trails, and their interpretation using Fresnel holography: a new tool in meteor science

Elford, W. G.

doi:10.5194/acp-4-911-2004

Cited by 28 publications

(52 citation statements)

References 4 publications

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“…Most of these methods make use of the typical signal characteristics due to the specular observation geometry, which is well described by a Fresnel diffraction pattern (e.g. McKinley, 1961;Baggaley, 2002;Elford, 2004). However, the achievable accuracy of the velocity estimates is fairly variable depending on the applied technique.…”

Section: Velocity Measurementmentioning

confidence: 99%

The Geminid meteor shower during the ECOMA sounding rocket campaign: specular and head echo radar observations

et al. 2013

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The ECOMA (Existence of Charge state Of meteoric smoke particles in the Middle Atmosphere) sounding rocket campaign was conducted during the Geminid meteor shower in December 2010 in order to explore whether there is a change of the properties of meteoric smoke particles due to the stream. In parallel to the rocket flights, three radars monitored the Geminid activity located at the launch site in Northern Norway and in Northern Germany to gain information about the meteor flux into the atmosphere. The results presented here are based on specular meteor radar observations measuring the radiant position, the velocity and the meteor flux into the atmosphere during the Geminids. Further, the MAARSY (Middle Atmosphere Alomar Radar System) radar was operated to conduct meteor head echo experiments. The interferometric capabilities of MAARSY permit measuring the meteor trajectories within the radar beam and to determine the source radiant and geocentric meteor velocity, as well as to compute the meteor orbit

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Section: Velocity Measurementmentioning

confidence: 99%

The Geminid meteor shower during the ECOMA sounding rocket campaign: specular and head echo radar observations

et al. 2013

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“…The motivation for this campaign was to allow optimal implementation of the Fresnel transform for meteoroid speed estimation (e.g. Elford, 2004;Holdsworth et al, submitted for publication), which is best suited to shorter effective sampling times than those obtained using the standard operating parameters. An extra 4 coherent integrations were performed in analysis to produce a similar effective sampling time to that produced using the standard parameters.…”

Section: Davis Meteor Radarmentioning

confidence: 99%

“…Kelsall et al, 1998). Elford (2004) developed an application of the Fresnel transform to transverse meteor echo observations in order to determine the structure of the scattering ionisation immediately behind the head of the meteor trail. The technique effectively removes the effects of the meteoroid from the meteor echo, and has proven remarkably successful in not only giving insight into the fragmentation of meteoroids, but also revealing other significant features of the echoes, including decay time, radial drift speed, and phase of the scattered signal in the vicinity of the head of the trail (e.g.…”

Section: Fresnel Transform -Meteoroid Speedsmentioning

confidence: 99%

“…Third, it includes meteoroid speeds estimates using the Fresnel transform (e.g. Elford, 2004;Holdsworth et al, submitted for publication). Unlike the MST radar, the meteor radar is a dedicated meteor radar, performing meteor observations only.…”

Section: Introductionmentioning

confidence: 99%

“…Section 5 presents the results of a new technique for estimating meteor speeds (e.g. Elford, 2004; submitted for publication), while Section 6 combines the new radiant mapping and meteor speed techniques for unambiguous meteor shower identification.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Antarctic meteor observations using the Davis MST and meteor radars

Holdsworth

Murphy

Morris

2008

Advances in Space Research

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All‐sky imaging of meteor trails at 55.25 MHz with the first station of the Long Wavelength Array

et al. 2014

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A new capability for high-sensitivity, all-sky monitoring of VHF meteor trail reflections with the first station of the Long Wavelength Array, or "LWA1, " is described. LWA1 is a ∼ 100 m diameter HF/VHF array of 256 crossed-dipole antennas with a unique transient buffer mode that allows it to monitor for meteor trails via all-sky imaging with the same sensitivity as a single-dish antenna ≳40 m in diameter. To demonstrate this capability, we have used a 2 h observing run conducted in August 2012 aimed at detecting and characterizing meteor trail reflections of analog TV transmissions at 55.25 MHz. The analysis techniques described here allowed for a detection rate of ∼9500 trails per hour, including the detection of two meteor streams with radiants in the Aries/Perseus and Aquila/Hercules regions that were not previously reported in the literature. In addition, we have found a population of relatively long-duration (∼1 to a few minutes), typically faint trails. These trails have implied horizontal speeds of 15-130 m s −1 , with a typical speed of ∼30 m s −1 . We have also used high-resolution time series of the brightest trails to characterize decay times over a relatively large geographical area (10• in longitude and latitude) and on short (∼5 min) time scales. Potential enhancements that could be enabled by the addition of more LWA stations are discussed.

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Radar observations of meteor trails, and their interpretation using Fresnel holography: a new tool in meteor science

Cited by 28 publications

References 4 publications

The Geminid meteor shower during the ECOMA sounding rocket campaign: specular and head echo radar observations

The Geminid meteor shower during the ECOMA sounding rocket campaign: specular and head echo radar observations

Antarctic meteor observations using the Davis MST and meteor radars

All‐sky imaging of meteor trails at 55.25 MHz with the first station of the Long Wavelength Array

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