Results 171 to 180 of about 20,447 (217)

Techniques for Measuring Radar Meteor Speeds

Earth, Moon, and Planets, 2004
We compare the results from the application of four different methods to determine the speed of meteoroids from single station radar data. The methods used are the pre-t 0 amplitude, post-t 0 amplitude, pre-t 0 phase and the Fresnel transform (FT) methods. Speeds from the first three methods are compared to the FT method since, requiring the use of the
W. J. Baggaley, J. Grant
openaire   +1 more source

The Canadian Meteor Orbit Radar Meteor Stream Catalogue

Earth, Moon, and Planets, 2007
The Canadian Meteor Orbit Radar is a multi-frequency backscatter radar which has been in routine operation since 1999, with an orbit measurement capability since 2002. In total, CMOR has measured over 2 million orbits of meteoroids with masses greater than 10 μg, while recording more than 18 million meteor echoes in total.
Peter Brown, Robert J. Weryk, Daniel K. Wong, James Jones   +3 more
openaire   +1 more source

The French meteor radar facility

Journal of Atmospheric and Terrestrial Physics, 1978
Abstract A brief history of the meteor radars developed by the National Center for Telecommunication Studies is followed by a description of the equipment and data analysis techniques. Details are given of the simultaneously measured radio meteor winds over Garchy, France (47°N, 3°E) and Kiruna, Sweden (68°N, 20°E) during August 1974, and over Garchy
M. Glass, R. Bernard, J.L. Fellous, M. Massebeuf   +3 more
openaire   +1 more source

Radar Detection of Meteor Trails

Nature, 1946
IN the course of ionospheric observations made during the International Polar Year 1932–33, a transient type of radio echo was observed from levels in the upper atmosphere about 100 km. above the ground. Such echoes were found to last only a second or two and were noted to be equally frequent both by day and by night.
EDWARD APPLETON, R. NAISMITH
openaire   +1 more source

Antarctic meteor observations using the Davis MST and meteor radars

Advances in Space Research, 2008
Abstract This paper presents the meteor observations obtained using two radars installed at Davis (68.6°S, 78.0°E), Antarctica. The Davis MST radar was installed primarily for observation of polar mesosphere summer echoes, with additional transmit and receive antennas installed to allow all-sky interferometric meteor radar observations.
Holdsworth, D., Reid, I., Murphy, D., Morris, R.   +3 more
openaire   +2 more sources

Meteor radar observations at Kyoto University

Journal of Atmospheric and Terrestrial Physics, 1979
Abstract A brief description of a coherent-pulse Doppler radar system recently installed at Kyoto and some initial results obtained with it are presented. The solar semidiurnal tide generally dominates the wind oscillations at these heights, while a diurnal tide of comparable magnitude reveals itself in a less regular manner.
T. Aso, T. Tsuda, S. Kato
openaire   +1 more source

Conjuring Radar Meteor Head-Echoes

2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC), 2018
The argument surrounding under-dense vs. over-dense radar meteors has raged for decades. Here we consider the head-echo case by the noting that the two limiting scattering regimes for the same radar (scattering) cross-section (RCS) are each easily described.
openaire   +1 more source

Radar observations of meteor deceleration

Journal of Geophysical Research, 1966
By using a narrow-beam high-power radar operating at 68 cm it has been possible to detect meteors traveling radially toward the radar. In these observations the antenna is directed at the radiant point of an intense meteor shower, and the receiver is tuned to the expected Doppler-shifted signal.
openaire   +1 more source

Complex Plane Specular Meteor Radar Interferometry

Radio Science, 2018
AbstractThis paper presents a solution to the problem of specular meteor radar interferometry cast on the complex plane. This technique is applicable to all meteor radars at the output of the receiver's pulsed Doppler signal processing chain. Specular meteor trail radar echoes are modeled as exponentially decaying sinusoids impinging on a sparse ...
Cody V. Vaudrin, Scott E. Palo, Jorge L. Chau   +2 more
openaire   +1 more source

Optical radar results and meteoric fragmentation

Journal of Geophysical Research, 1964
Recent optical radar experiments utilizing a ruby laser as the source of radiation have indicated the existence of a scattering layer in the upper atmosphere at an altitude between 110 and 140 km. The echoes have been tentatively interpreted in accordance with a model of meteoric fragmentation and have been related to other experimental results.
G. Fiocco, G. Colombo
openaire   +1 more source