Download or read book Theoretical Heights and Durations of Echoes from Large Meteors written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1962 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Theoretical Heightb and Durations of Echoes from Large Meteors written by Laurence A. Manning and published by . This book was released on 1962 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical theory of the durations of radio echoes from overdense trails is developed. Included is the dependence of the height distribution of ionization on meteor magnitude, velocity, zenith angle, the form of the attachment law, the height dependence of diffusion coefficient, and an adjustable relation between luminous and ionizing efficiency. It is shown that well defined attachment-free and attachmentcontrolled duration regions exist with different line-density and wavelength dependences. The transition zone is broad, and its location depends strongly on meteor velocity. Normalized duration and line-density parameters are defined in terms of which a single computer-calculated duration vs density relation good for all parameter values is plotted. Bridging formulas approximating the duration relation are derived from asymptotic expressions, and the relation between echoing height and duration or line density is presented. Equations are given relating the exponent of the wavelength to echo duration. (Author).

Download or read book Journal of Research National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1964 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Research written by United States. National Bureau of Standards and published by . This book was released on 1964 with total page 1354 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 Journal of Research of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1964 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Research of the National Bureau of Standards written by and published by . This book was released on 1964 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1967 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications United States National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1960 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications July 1960 Through June 1966 written by United States. National Bureau of Standards and published by . This book was released on 1967 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Miscellaneous Publication National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1934 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Supplementary List of Publications of the National Bureau of Standards written by and published by . This book was released on 1960 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1957 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AFOSR written by United States. Air Force. Office of Scientific Research and published by . This book was released on 1968 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quarterly Research Review No 3 1 October Through 31 December 1962 written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1962 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Highlights of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1965 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Determination of Meteoric Line Densities and Attachment Rates written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1963 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theory for the dependence of meteoric-echo heights and durations on meteor velocity and magnitude, and on the radio wavelength, is used to interpret experimental meteor data of a variety of types. It is shown that the data set forms a more consistent whole on the assumption of a three-body than of a two-body attachment process. No velocity dependence is found for the ratio of line density to luminosity. An attachment time constant of about 100 sec is deduced for a reference height of 95 km, and a zero-magnitude meteor is found to produce a maximum line density of about 100 electrons/m. Combination of the theoretical and experimental results makes possible calculation of the heights and durations of meteor echoes under a full range of conditions. (Author).