The statistics of meteors in the earth's atmosphere

Hawkins, Gerald S.; Southworth, R. B.

doi:10.5479/si.00810231.2-11.349

Cited by 71 publications

(26 citation statements)

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“…Ceplecha (1958) and Ceplecha and Padev&t (1961) have attempted to evaluate n by using Harvard data on small-camera meteors (Jacchia, 1952) and on Super-Schmidt meteors (Hawkins and Southworth, 1958). Their results are n= -0.33 ±0.61 for small-camera meteors and n=-2.8 ±0.2 for Super-Schmidt meteors.…”

Section: Introductionmentioning

confidence: 99%

“…Recently Ananthakrishnan (1960Ananthakrishnan ( , 1961, trying to remove the disagreement between the theoretical beginning and end heights and the measured heights of the photographic meteors reduced by Hawkins and Southworth (1958), introduced the hypothesis that T P varies along the trail of an individual meteor in proportion to the atmospheric density p a . Evidently this assumption has no physical basis either.…”

Section: Introductionmentioning

confidence: 99%

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On the luminous efficiency of meteors

Verniani¹

1965

Smithsonian Contributions to Astrophysics

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the luminous efficiency of meteors

Verniani¹

1965

Smithsonian Contributions to Astrophysics

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“…Especially today, in the age of a renewed push toward the space tourism and suborbital passenger commercial flights and more frequent low-Earth-orbit and deepspace manned flights, the problem of chamber decompressions deservedly regained our attention. In suborbital and orbital flights, the additional risks, such as the shower of the ultrafast micrometeorites, can occur [12,13]. Such micrometeorites can punch large holes in the aircraft/spacecraft structure, causing rapid decompressions.…”

mentioning

confidence: 99%

Aircraft Decompression with Installed Cockpit Security Door

Daidzic

Simones

2010

Journal of Aircraft

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A zero-dimensional model of cockpit and cabin decompression with cockpit security door is presented. The hinged panels in the security door were modeled to account for the pressure-equalization dynamics in the case of cockpit decompression. A comprehensive isentropic and isothermal theoretical analysis is presented with many closed-form and asymptotic solutions. New analytical estimates for the total decompression time and the pressure half-time were derived. The simulations for typical corporate and large-transport-category airplanes with different cabin geometries, discharge coefficients, rupture cross-sectional areas, pressure altitudes, and cabin altitudes have been obtained. The case in which the cockpit depressurizes first and its effect on the cabin decompression and on the security door integrity has been extensively studied. The recently required cockpit doors may be hazardous for flight crew in the case cockpit depressurizes first and other venting and blowout panels malfunction or are too slow to respond. The resulting pressure differential between the cockpit and the cabin can create instantaneous forces in excess of 80 kN on the cockpit security door. In addition, this puts the crew in danger due to explosive decompression on the time scale of 100 ms and increases the possibility of the security door being blown out of the frame.

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“…Southworth and Hawkins (1963) applied the Dcriterion to a sample of 360 meteor orbits. The data represented a random sample of meteors photographed from two stations by the Harvard Super-Schmidt meteor cameras (Hawkins and Southworth, 1958). In the present paper, the study is extended to include 865 precise photographic two-station orbits of the Harvard Meteor Program.…”

Section: Bertil-anders Lindbladmentioning

confidence: 99%

Two computerized stream searches among meteor orbits: 1. Among 865 precise photographic orbits [and] 2. among 2401 photographic orbits

Lindblad¹

1971

Smithsonian Contributions to Astrophysics

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This series, Smithsonian Contributions to Astrophysics, was inaugurated in 1956 to provide a proper communication for the results of research conducted at the Astrophysical Observatory of the Smithsonian Institution. Its purpose is the "increase and diffusion of knowledge" in the field of astrophysics, with particular emphasis on problems of the sun, the earth, and the solar system. Its pages are open to a limited number of papers by other investigators with whom we have common interests.The policy of issuing the Contributions in volumes consisting often of unrelated papers numbered sequentially ended with volume 11. With this issue (No. 12), each Contribution will bear a single series number and will contain either one or several related papers.

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The statistics of meteors in the earth's atmosphere

Cited by 71 publications

References 0 publications

On the luminous efficiency of meteors

On the luminous efficiency of meteors

Aircraft Decompression with Installed Cockpit Security Door

Two computerized stream searches among meteor orbits: 1. Among 865 precise photographic orbits [and] 2. among 2401 photographic orbits

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