Download or read book Tables of Meteor Ablation written by M. Gadsden and published by . This book was released on 1967 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Table for the Calculation of Meteor Velocities written by M. Šimek and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Analysis of a High velocity Meteor written by Gale A. Harvey and published by . This book was released on 1977 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Empirical Analysis of Unaccelerated Velocity and Mass Distributions of Photographic Meteors written by Cearcy D. Miller and published by . This book was released on 1970 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: An empirical analysis was performed on data for 2000 sporadic meteors. A bimodal log-normal equation was found for unaccelerated velocity distribution, by empirical curve fitting to match observed velocity distributions for meteoroids within 10 ranges of mass with due regard to failure of observation of faint meteors. An exponent of -1.34 was confirmed in the equation for cumulative influx rate of meteoroids relative to mass. An exponent of -3.87 was established for meteoroid velocity relative to Earth's atmosphere as used in an earlier weighting factor for correction of biasing effects of velocity and mass. Earlier theoretical results were closely approximated.
Download or read book Simultaneous Correction of Velocity and Mass Bias in Photography of Meteors written by Cearcy D. Miller and published by . This book was released on 1968 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: In any statistical study of characteristics of meteors with data obtained from photographs, corrections must be made for two inherent biasing effects due to the brighter trails left by meteors of greater mass and/or by meteors of greater velocity relative to Earth's atmosphere. In the past, attempts have been made to correct for both biasing effects with a weighting factor inversely proportional to the square of the meteor velocity relative to atmosphere. A new analysis has been made to investigate the magnitude of the weighting factor, specifically for application to photographic meteor data published by Smithsonian Institution Astrophysical Observatory. As a result of this analysis, a revised factor was obtained to operate upon actual counts of photographic meteors within various classes of velocity to provide a correct ratio of counts for all velocities reduced to any given lower mass limit. In the analysis, an expression was derived theoretically for maximum effective exposure on the photographic plate produced by a meteor in terms of the original mass of the particle, its velocity relative to Earth's atmosphere, and the angle of its path to the zenith. The expression for maximum effective exposure was tested and revised by application to 100 test meteors that were believed to have provided approximately uniform effective exposure density. The revised expression for maximum effective exposure was combined with a widely accepted equation for the influx rate of meteors of mass greater than a stated value to obtain approximately the desired weighting factor. The manner of the combination eliminated mass of the meteor particle from the factor. The analysis indicated a large change in value of the exponent of velocity relative to Earth's atmosphere in the weighting factor, namely, from -2 downward at least to -3.85 and possibly as low as -4.22. Application of the new factor should cause a significant reduction of estimates of average meteor velocities relative to the atmosphere. Extensive changes would also be required in estimates of other parameters that might bear a systematic relation to meteor velocities.
Download or read book Physics of Meteor Flight in the Atmosphere written by Ernst Julius Opik and published by Courier Corporation. This book was released on 2004-08-01 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume by an astrophysics pioneer concerns the phenomena occurring during the flight of meteors through the terrestrial atmosphere. Beginning with a historical view of the study of meteor activity, the text examines atmospheric conditions and the classification and physico-chemical properties of meteors. Also includes meteoroid energy transfer, ablation, atomic collisions, and meteor radiation.
Download or read book Simulation of Meteoroid velocity Impact by Use of Dense Projectiles written by Robert H. Morrison and published by . This book was released on 1970 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of Meteoric Phenomena written by V.A. Bronshten and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Meteoric phenomena" is the accepted term for the complex of physi cal phenomena that accompany the entry of meteoric bodies into the at mosphere of the earth (or of any planet). "Meteoric bodies" are usually defined as cosmic bodies observed by optical or radar techniques, when they enter the atmosphere. The limiting sensitivity of present-day radar equipment makes it possible to record meteors of up to stellar magnitude +14, while the most brilliant bolides may reach magnitude -19. On a mass 7 7 scale this corresponds approximately to a range of 10- to 10 g. How ever, met~or astronomy is also concerned with larger objects, namely crater-forming meteorites, or objects that cause large-scale destruction when they arrive through the atmosphere (an example is the Tunguska River meteorite). Consideration of the interaction of such objects with 12 the terrestrial atmosphere extends the mass range to 10 g. On the other hand, scientists studying fragmentation processes in meteoric bod 7 ies have to consider particles with masses less than 10- g, and the use of data from meteoric-particle counters on rockets and artificial satel lites, from microcraters on the lunar surface, and from noctilucent clouds 12 lowers the minimum mass to 10- g. Therefore, the mass range of meteoric bodies, or meteoroids, encompasses 24 orders of magnitude. Although recent years have witnessed considerable development in meteor research, both in the Soviet Union and elsewhere, the main mono graphs on meteor physics were published twenty or more years ago.
Download or read book Radio Measurements of Meteor Velocities written by John Sidney Mainstone and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meteoroid Hazard Evaluation for Simple Structures with Various Orientations written by Cearoy D. Miller and published by . This book was released on 1970 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A statistical analysis was performed with use of Smithsonian Astrophysical Observatory's data on photographic meteors with use of weighting factors developed at Lewis Research Center for correction of various biases involved in meteor photography. The analysis used an armor damage criterion supplied by Ames Research Center. Although the analysis was restricted to Earth's orbit about Sun, implications are discussed regarding total population of meteoroids throughout the solar system. In Earth's orbit about the Sun, advantage was found for cylindrical armor extending in the solar direction and a plane sheet alined normal to apex of Earth movement.
Download or read book Development of a Method for Meteor Trajectory Analysis written by Léopold Moulin and published by . This book was released on 1965 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: It can be concluded from the present analysis that a method has been developed to calculate the geometry of natural meteors entering the atmosphere, and to deduce actual values of heat transfer coefficients and luminous efficiency factors, starting from observations of velocity, altitude and luminosity for various epochs. Systematic application of the method to a series of meteor data should lead to the formulation of correlations for heat transfer coefficients and luminous efficiency factors. From the particular case of meteor Meanook 132 it already appears that the drag coefficients plays a predominant role at high altitudes and high velocities, that heat transfer is considerably larger than anticipated and that the luminous efficiency factor may not be regarded as constant but increases as the body penetrates the atmosphere. (Author).
Download or read book Physical and Dynamical Studies of Meteors written by Zdenek Sekanina and published by . This book was released on 1975 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Analysis of a High velocity Meteor written by Gale Allen Harvey and published by . This book was released on 1977 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Meteoritics written by E.L. Krinov and published by Elsevier. This book was released on 2013-10-22 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Meteoritics examines the significance of meteorites in relation to cosmogony and to the origin of the planetary system. The book discusses the science of meteoritics and the sources of meteorites. Scientists study the morphology of meteorites to determine their motion in the atmosphere. The scope of such study includes all forms of meteorites, the circumstances of their fall to earth, their motion in the atmosphere, and their orbits in space. Meteoric bodies vary in sizes; in calculating their motion in interplanetary space, astronomers apply the laws of Kepler. In the region of retardation, the direction of motion of the meteoric body changes, and a break in the visible and real trajectories follows. The angle of fall of meteorites at a vertical line on the surface of the Earth measures between 20 degrees to 30 degrees. The text also discusses the Tunguska and Sikhote-alin meteorites, two gigantic meteorites that fell in the U.S.S.R. The text also discusses the chemistry, the mineralogy, the petrography, and the physical properties of meteorites. The book is suitable for astronomers, geologists, and general readers who have an interest in sky watching.
Download or read book Meteor Showers and Their Parent Comets written by Petrus Matheus Marie Jenniskens and published by Cambridge University Press. This book was released on 2006-09-14 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher description
Download or read book Modern Meteor Science written by Robert Hawkes and published by Springer Science & Business Media. This book was released on 2006-08-18 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains leading edge research and authoritative reviews in meteor science. It provides a comprehensive view of meteoroid research including the dynamics, sources and distribution of these bodies. Techniques for investigation of meteor phenomena in the book include conventional and large aperture radar systems, spacecraft detection, optical systems, spectral measurements, and laboratory based interplanetary dust particle studies.
Download or read book Meteor Astronomy written by Bernard Lovell and published by . This book was released on 1954 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
