The Canadian JANET System

Davis, G. W. L.; Gladys, S. J.; Lang, G. R.; Luke, L. M.; Taylor, M. K.

doi:10.1109/jrproc.1957.278299

Cited by 25 publications

(4 citation statements)

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“…We considered these characteristics to be potentially relevant to decisional conflict based on their theoretical or empirical association in past studies. [11][12][13][14][15][16][17]25,26…”

Section: Participant Characteristicsmentioning

confidence: 99%

Decisional Conflict About Kidney Failure Treatment Modalities Among Adults With Advanced CKD

DePasquale¹,

Green²,

Ephraim³

et al. 2022

Kidney Medicine

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Section: Participant Characteristicsmentioning

confidence: 99%

Decisional Conflict About Kidney Failure Treatment Modalities Among Adults With Advanced CKD

DePasquale¹,

Green²,

Ephraim³

et al. 2022

Kidney Medicine

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“…The transmission is largely impervious to electrical interference, such as polar and auroral disturbances [Hel87,DG+57].…”

Section: The Advantages Of Mbc Includementioning

confidence: 99%

Using artificial neural networks for meteor-burst communications trail prediction

Melville¹,

Sutcliffe

Fraser³

1996

Lecture Notes in Computer Science

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The use of meteor ionisation trails as 'cheap satellites' to reflect radio waves between two points on the earth's surface is an established technique, called Meteor Burst Communications (MBC). For MBC systems to take advantage of the different amplitude and duration patterns of different trail types it is necessary to predict these patterns from features of initial signals reflected from the trails. The work described in this paper attempts to predict trail amplitude, duration, and trail type using neural networks. Results include a picture of what features of the beginning of the trail are most and least important for recognising various characteristics of the rest of the trail, some significant results as regards trail type prediction, and high correlations between actual and predicted peak amplitudes of trails. The latter is an important result.

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“…The Canadian radio-physicists have elaborated the project JANET which shows how meteor trails can be used for radio communication over large distances [9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Usamentioning

confidence: 99%

“…by Harvard College Observatory in order to obtain reliable information on the radiant, velocity and acceleration of individual meteors down to 12th magnitude. [6,7,8],The Canadian radio-physicists have elaborated the project JANET which shows how meteor trails can be used for radio communication over large distances [9][10][11][12][13][14][15][16][17][18][19][20]. …”

mentioning

confidence: 99%

22. Commission des Meteores et des Meteorites

Guth¹

1960

Trans. Int. Astron. Union

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The past triennium has been characterized by further developments in meteor astronomy, and the following results have been obtained:(1) The majority of meteors, whether photographic and visual or radar and telescopic, show a strong preference for direct motion near the ecliptic inside the solar system.(2) Meteors are connected with comets and their orbits have the same distribution as those of comets.(3) Meteorites are connected with the system of minor planets; micro-meteorites with the zodiacal light.(4) The structure of a few showers and their ages have been determined. These results are based on improved observational methods (photographic, radar and telescopic observation in connexion with visual observations).Great progress has also been made in the physical theory of meteors, although many unknown parameters permit different interpretations of the new theories. I.G.Y. measurements directly in the ' meteor surroundings' (artificial satellites and meteors) will contribute to the removal of the fundamental discrepancies which exist today. We shall then know even better the interaction between the atmosphere and meteors.The detailed description of results obtained is presented below. O B S E R V A T I O N A L M E T H O D SRadar observations of meteors were made in the following countries: Australia. Radio-echo rates for both shower and sporadic meteors have been systematically measured from 1952 at Adelaide with the 27 Mc/s C.W. equipment. Meteors above limiting brightness in the range M R + y-$ are regularly registered. A. A. Weiss discusses the sporadic background [1], shower meteors [2] and the influx of meteor particles over the whole surface of the Earth and their density in space [3]. The results are in good agreement with those obtained at other radio stations.Canada. A new meteor observatory was erected in 1957 at Springhill (20 miles southsouth-east of Ottawa) where the programme of meteor research using a combination of radio, photographic and visual techniques was transferred from Metcalf Road Field M E T E O R E S E T M E T E O R I T E SStation. A 32 Mc/s meteor radar with peak power of 400 kW and single-dipole antenna system has been built specially for the I.G.Y. meteor programme. In addition to this a special 32 Mc/s I.G.Y. meteor radar with peak power near 20 kW and omni-directional antennas is operated continuously throughout the I.G.Y. [4].Czechoslovakia. The first Czechoslovak radar was finished in 1957. It works on a frequency of 37-5 Mc/s with peak power of 25 kW and with a rotating antenna system (14 x 6 m; the beam-width to the half-power points is +16° in the horizontal plane and ± 27° in the vertical plane) at an elevation of 45 0 . The radar is now being tested. Great Britain. The radio survey of meteor activity has been continued at the Jodrell Bank Station of the University of Manchester with the same equipment as before. Important results on meteor physics have been obtained. U.S.A.A system of megawatt transmitter and six receiving stations are proposed to be operated during the ...

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The Canadian JANET System

Cited by 25 publications

References 0 publications

Decisional Conflict About Kidney Failure Treatment Modalities Among Adults With Advanced CKD

Decisional Conflict About Kidney Failure Treatment Modalities Among Adults With Advanced CKD

Using artificial neural networks for meteor-burst communications trail prediction

22. Commission des Meteores et des Meteorites

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