Results 1 to 10 of about 20,243 (133)

The Geminid meteor shower during the ECOMA sounding rocket campaign: specular and head echo radar observations [PDF]

open access: yesAnnales Geophysicae, 2013
The ECOMA (Existence of Charge state Of meteoric smoke particles in the Middle Atmosphere) sounding rocket campaign was conducted during the Geminid meteor shower in December 2010 in order to explore whether there is a change of the properties of ...
G. Stober   +6 more
doaj   +3 more sources

Meteor radar measurements of MLT winds near the equatorial electro jet region over Thumba (8.5° N, 77° E): comparison with TIDI observations [PDF]

open access: yesAnnales Geophysicae, 2011
The All-Sky interferometric meteor (SKYiMET) radar (MR) derived winds in the vicinity of the equatorial electrojet (EEJ) are discussed. As Thumba (8.5° N, 77° E; dip lat.
S. R. John   +4 more
doaj   +3 more sources

Coded continuous wave meteor radar [PDF]

open access: yesAtmospheric Measurement Techniques, 2016
The concept of a coded continuous wave specular meteor radar (SMR) is described. The radar uses a continuously transmitted pseudorandom phase-modulated waveform, which has several advantages compared to conventional pulsed SMRs.
J. Vierinen   +4 more
doaj   +6 more sources

Diurnal variation of non-specular meteor trails [PDF]

open access: yesAnnales Geophysicae, 2009
We present results of simulated radar observations of meteor trails in an effort to show how non-specular meteor trails are expected to vary as a function of a number of key atmospheric, ionospheric and meteoroid parameters.
J. Hinrichs, L. P. Dyrud, J. Urbina
doaj   +5 more sources

Meteor velocity determination with plasma physics [PDF]

open access: yesAtmospheric Chemistry and Physics, 2004
Understanding the global meteor flux at Earth requires the measurement of meteor velocities. While several radar methods exist for measuring meteor velocity, they may be biased by plasma reflection mechanisms.
L. P. Dyrud   +6 more
doaj   +1 more source

Radar and optical leonids [PDF]

open access: yesAtmospheric Chemistry and Physics, 2004
We present joint optical-radar observations of meteors collected near the peak of the Leonid activity in 2002. We show four examples of joint detections with a large, phased array L-band radar and with intensified video cameras.
N. Brosch   +4 more
doaj   +4 more sources

Diurnal and annual variations of meteor rates at the arctic circle [PDF]

open access: yesAtmospheric Chemistry and Physics, 2004
Meteors are an important source for (a) the metal atoms of the upper atmosphere metal layers and (b) for condensation nuclei, the existence of which are a prerequisite for the formation of noctilucent cloud particles in the polar mesopause region.
W. Singer, U. von Zahn, J. Weiß
doaj   +6 more sources

Error analyses of a multistatic meteor radar system to obtain a three-dimensional spatial-resolution distribution [PDF]

open access: yesAtmospheric Measurement Techniques, 2021
In recent years, the concept of multistatic meteor radar systems has attracted the attention of the atmospheric radar community, focusing on the mesosphere and lower thermosphere (MLT) region. Recently, there have been some notable experiments using such
W. Zhong   +13 more
doaj   +1 more source

A VHF Circularly Polarized Turnstile Antenna with Balun for Meteor Radar

open access: yesRemote Sensing, 2023
This paper presents a circularly polarized turnstile antenna for a meteor radar system. The antenna employs a pair of turnstile radiators, a 1:2 power divider and a 90° phase shifter.
Wei Qiao   +4 more
doaj   +1 more source

Distribution Characteristics of Meteor Angle of Arrival in Mohe and Wuhan, China

open access: yesAtmosphere, 2023
Meteor radar is one of the key tools for studying the atmospheric dynamics in the mesosphere and lower thermosphere. The physical parameters obtained by meteor radar inversion can provide important statistical information for research.
Xiaoyong Du   +12 more
doaj   +1 more source

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