LIV. A radio echo apparatus for the delineation of meteor radiants

Aspinall, Arthur; Clegg, J. A.; Hawkins, Gerald S.

doi:10.1080/14786445108561179

Cited by 17 publications

(5 citation statements)

References 10 publications

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“…The different radiation patterns of the aerial systems of the two equipments result in quite different responses to the same shower. For the radiant equipment, the method of radiant determination has been fully described by and by Aspinall, Clegg, and Hawkins (1951), and elaboration is unnecessary. By fitting computed range-time envelopes to observed echoes, the time of occurrence of echoes of 700 km range is determined for each aerial.…”

Section: The Determination Of Meteor Shower Radiantsmentioning

confidence: 99%

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Radio Echo Observations of Meteors in the Southern Hemisphere

Weiß¹

1955

Aust. J. Phys.

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The results of a radio survey of meteor activity at Adelaide are presented. The radiants and activities of six major meteor showers (Geminids, day-time Arietids, ?-Perseids, d-Aquarids, Corona Australids, Orionids) have been measured by methods which are described, and the mass distributions in three of these showers are discussed. Seasonal and diurnal variations in the background activity of sporadic meteors are examined in relation to the radiation patterns of the aerial systems. Height distributions for meteors of three showers (Geminids, day-time Arietids, ?-Perseids) are given. Diurnal variations in the height distribution of sporadic meteors do not conform to those expected from the motion of the apex of the Earth's way.

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Section: The Determination Of Meteor Shower Radiantsmentioning

confidence: 99%

“…The radiant equipment is essentially similar to the radio echo apparatuS'. described by Aspinall, . Clegg, and Hawkins (1951).…”

Section: Introductionmentioning

confidence: 99%

Radio Echo Observations of Meteors in the Southern Hemisphere

Weiß¹

1955

Aust. J. Phys.

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“…Davies & Lovell (1955) describe a radar survey using Jodrell Bank from 1947 to 1954 which specifically ran on the expected Draconid peak days, and found only one significant return of the ★ E-mail: margaret.campbell@uwo.ca shower in 1952, peaking at solar longitude 197 • . At this point the radar had been upgraded to have two independently steerable antennas (Aspinall et al 1951), which were pointed just north and south of due west. The time of maximum is somewhat uncertain, since the radiant was close to zenith, meaning that radar echoes were close to the horizon.…”

Section: Introductionmentioning

confidence: 99%

Radar observations of Draconid outbursts

Campbell-Brown

Stober

Jacobi

et al. 2021

Monthly Notices of the Royal Astronomical Society

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The Draconid meteor shower shows strong bursts of activity at irregular intervals, with nearly no activity in intervening years. Five outbursts of the Draconid meteor shower were observed with specular meteor radars in Canada and Europe between 1999 and 2018. The outbursts generally lasted between 6 and 8 hours, and most were not fully visible at a single geographical site, emphasizing the need for observations at multiple longitudes for short-duration shower outbursts. There is at least a factor of two difference in the peak flux as measured on different radars; the initial trail radius effect is undercorrected for Draconid meteors, which are known to be fragile.

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“…The fundamental method for determining the radiant coordinates of meteor streams (Right Ascension IX, declination a) was that due to Clegg (1948aClegg ( , 1948b which possesses the great advantage of requiring only a single observing station. However, Clegg's method of analysis and his technique of using range-time envelopes in the reduction of the meteor plots became unsuitable when the meteor rates were high.…”

Section: Introductionmentioning

confidence: 99%

“…In order to delineate a radiant from a single day's records Aspinall, Clegg, and Hawkins (1951) replaced Clegg's single rotatable array by two fixed arrays equally spaced in azimuth about the east-west direction. With neither beam directed at an azimuth of 90° from north the time of reception of echoes from the horizon range no longer corresponds closely to the time of transit of the radiant.…”

Section: Introductionmentioning

confidence: 99%