Results 81 to 90 of about 17,275 (278)

Observations of meteor-head echoes using the Jicamarca 50MHz radar in interferometer mode [PDF]

Atmospheric Chemistry and Physics, 2004
We present results of recent observations of meteor-head echoes obtained with the high-power large-aperture Jicamarca 50MHz radar (11.95°S, 76.87°W) in an interferometric mode.
J. L. Chau, R. F. Woodman
doaj  

Physical and dynamical studies of meteors. Meteor-fragmentation and stream-distribution studies [PDF]

Population parameters of 275 streams including 20 additional streams in the synoptic-year sample were found by a computer technique. Some 16 percent of the sample is in these streams.
Sekanina, Z., Southworth, R. B.
core   +1 more source

Comet and Meteorite Traditions of Aboriginal Australians

, 2014
Of the hundreds of distinct Aboriginal cultures of Australia, many have oral traditions rich in descriptions and explanations of comets, meteors, meteorites, airbursts, impact events, and impact craters. These views generally attribute these phenomena to
AWR Bevan, DW Hamacher, DW Hamacher, DW Hamacher, DW Hamacher, DW Hamacher, G Baker, J Goldsmith, P Reeves-Sanday, R Edwards   +9 more
core   +1 more source

Droughts and human impact in the ancient Uaymil region of the Maya lowlands inferred from a 2800‐year sedimentary archive at Lake Kaná, Mexico

Boreas, EarlyView.
The relationship between the climate and societal transformation in Maya lowlands has long been debated, particularly the role of drought in shaping the civilization trajectory during the Classic Period. A high‐resolution, multi‐proxy, geochemical record from Lake Kaná, located in the underexplored Uaymil region of the Yucatán Peninsula in Mexico ...
Haydar B. Martinez‐Dyrzo, Priyadarsi D. Roy, Benjamin Gwinneth, Irma G. Vargas‐Martinez, Alejandro A. Aragon‐Moreno, Roger Medina‐Gonzales   +5 more
wiley   +1 more source

DOUBLE STATION OBSERVATION OF METEORS WITH LOW BASELINE IN MYKOLAIV

Odessa Astronomical Publications, 2017
Results of single and double station observations  of  meteors  using  TV  CCD  techniques  which were  conducted  in  2013-2016  in  Mykolaiv  astronomical observatory (RI MAO) are shown in the article.
M. O. Kulichenko, O. V. Shulga, O. V. Shulga   +2 more
doaj   +1 more source

Technical Possibilities and Limitations of the DPS-4D Type of Digisonde in Individual Meteor Detections

Remote Sensing
During the peak days of the 2019 Leonids and Geminids (16–19 November and 10–16 December), two ionograms/minute and one Skymap/minute campaign measurements were carried out at the Sopron (47.63°N, 16.72°E) and Průhonice (50.00°N, 14.60°E) Digisonde ...
Csilla Szárnya, Zbyšek Mošna, Antal Igaz, Daniel Kouba, Tobias G. W. Verhulst, Petra Koucká Knížová, Kateřina Podolská, Veronika Barta   +7 more
doaj   +1 more source

A Mathematical Model for Simulating Meteor Showers

Trends in Computational and Applied Mathematics, 2019
This paper presents a mathematical model to simulate the trajectory of a meteor as seen by a single observer located anywhere on Earth. Our strategy is to define a new coordinate system, called Radiant Coordinate System, which is centered on the observer
Marcos Cardinot, Anderson Namen
doaj   +1 more source

Radio meteor project Final scientific report, 1 Feb. 1963 - 31 Dec. 1965 [PDF]

Astrophysical research on meteors - Harvard radio meteor ...

core   +1 more source

Choice Feminism and the Opt‐Out Phenomenon: Is It Possible to Speak of Free Will?

Gender, Work &Organization, EarlyView.
ABSTRACT The aim of this research was to question choice feminism in the light of the opt‐out phenomenon, through a thematic narrative analysis of the professional trajectories of five Brazilian women with university degrees. As a result of the research—and the main contribution to the advancement of knowledge in the field—it was found that although ...
Paula Furtado Hartmann de Queiroz Monteiro, Alane de Oliveira Barbosa, Ana Heloísa da Costa Lemos, Alessandra Costa   +3 more
wiley   +1 more source

Multi-station fireball observations combining all-sky spectroscopy and optical trajectory measurements

Earth and Planetary Physics
Optical monitoring of fireballs can provide reconstructions of luminous trajectories and the derivation of heliocentric orbits, whereas spectral observations are able to supply information from an entirely different perspective, with composition and ...
ZhiJian Xu, HaiBin Zhao, Nawaz Mahomed, Yi Li   +3 more
doaj   +1 more source