Results 21 to 30 of about 20,447 (217)
MU head echo observations of the 2010 Geminids: radiant, orbit, and meteor flux observing biases [PDF]
Annales Geophysicae, 2013 We report Geminid meteor head echo observations with the high-power large-aperture (HPLA) Shigaraki middle and upper atmosphere (MU) radar in Japan (34.85° N, 136.10° E).
J. Kero, C. Szasz, T. Nakamura
doaj +1 more source
Canadian Meteor Orbit Radar (CMOR) [PDF]
Atmospheric Chemistry and Physics, 2004 The radar system described here (CMOR) comprises a basic 5-element receiving system, co-located with a pulsed transmitter, specifically designed to observe meteor echoes and to determine their position in space with an angular resolution of ~1° and a radial resolution of ~3 km.
A. R. Webster +5 more
openaire +6 more sources
The sporadic radiant and distribution of meteors in the atmosphere as observed by VHF radar at Arctic, Antarctic and equatorial latitudes [PDF]
Annales Geophysicae, 2009 Results are presented of a study of the temporal and spatial variability in meteor count rate observations from three VHF meteor radars. These radar are located in the Arctic (at Esrange, 68° N), in the Antarctic (at Rothera, 68° S) and near ...
P. T. Younger +3 more
doaj +1 more source
Comparison between the Mesospheric Winds Observed by Two Collocated Meteor Radars at Low Latitudes
Remote Sensing, 2022 This study compares the hourly mesospheric horizontal winds observed by two collocated and independent low-latitude meteor radars operating at 37.5 MHz and 53.1 MHz in Kunming, China (25.6°N, 103.8°E). Upon analyzing simultaneously detected meteor echoes,
Jie Zeng +8 more
doaj +1 more source
A comparison of MLT wind between meteor radar chain data and SD-WACCM results
Earth and Planetary Physics, 2022 A meteor radar chain located along the 120°E meridian in the Northern Hemisphere from low to middle latitudes provides long-term horizontal wind observations of the mesosphere and lower thermosphere (MLT) region.
BaoZhu Zhou +8 more
doaj +1 more source
Earth and Planetary Physics, 2018 Meteoroids entering the Earth's atmosphere can create meteor trail irregularity seriously disturbing the background ionosphere. Although numerous observations of meteor trail irregularities were performed with VHF/UHF coherent scatter radars in the past,
GuoZhu Li +6 more
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2022 Meteor observations provide information about Solar System constituents and their influx onto Earth, their interaction processes in the atmosphere, as well as the neutral dynamics of the upper atmosphere.
Juha Vierinen +14 more
doaj +1 more source
Diurnal variation of non-specular meteor trails [PDF]
Annales 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 +1 more source
Identifying gravity waves launched by the Hunga Tonga–Hunga Ha′apai volcanic eruption in mesosphere/lower-thermosphere winds derived from CONDOR and the Nordic Meteor Radar Cluster [PDF]
Annales Geophysicae, 2023 The Hunga Tonga–Hunga Ha′apai volcano eruption was a unique event that caused many atmospheric phenomena around the globe. In this study, we investigate the atmospheric gravity waves in the mesosphere/lower-thermosphere (MLT) launched by the volcanic ...
G. Stober +15 more
doaj +1 more source
Recombination in Radar Meteors [PDF]
International Astronomical Union Colloquium, 1971 Recombination of the Electrons in the ionized column has often been considered (see, for example, Öpik, 1955), but the uncertainties in the atomic and molecular species present and in the rate constants have made it difficult to predict. Furthermore, recombination has not been recognized in the observations, so that it has been judged to be negligible (
openaire +1 more source