Results 1 to 10 of about 17,392 (258)

The Development of a Low-Cost Fresnel Lens UV Telescope with SiPM Array for Low-Light Atmospheric Transient Detection [PDF]

open access: yesSensors
This work presents the development and experimental characterization of a compact ultraviolet (UV) telescope based on silicon photomultipliers (SiPMs) designed for the detection of faint atmospheric optical tracks.
Gabriel Chiritoi, Eugeniu Mihnea Popescu
doaj   +2 more sources

Long-Term Continuous Double Station Observation of Faint Meteor Showers [PDF]

open access: yesSensors, 2016
Meteor detection and analysis is an essential topic in the field of astronomy. In this paper, a high-sensitivity and high-time-resolution imaging device for the detection of faint meteoric events is presented. The instrument is based on a fast CCD camera
Stanislav Vítek   +3 more
doaj   +2 more sources

All-Sky Observation of the 2001 Leonid Meteor Storm: 1. Meteor Magnitude Distribution [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2003
The 2001 Leonid meteor storm has been observed all over the world, and its most intense flux since the last few decades has caused great interest among both laymen and experts. Especially, its maximum hours occurred at dawn hours of Nov.
Jeong Han Kim   +5 more
doaj   +1 more source

Localizing the First Interstellar Meteor with Seismometer Data

open access: yesSignals, 2023
The first meter-scale interstellar meteor (IM1) was detected by US government sensors in 2014, identified as an interstellar object candidate in 2019, and confirmed by the Department of Defense (DoD) in 2022.
Amir Siraj, Abraham Loeb
doaj   +1 more source

Time/Frequency Analysis of Terrestrial Impack Crater Records [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2006
The terrestrial impact cratering record recently has been examined in the time domain by Chang & Moon (2005). It was found that the ˜ 26 Myr periodicity in the impact cratering rate exists over the last ˜ 250 Myrs.
Heon-Young Chang
doaj   +1 more source

Slow Neutron-Capture Process: Low-Mass Asymptotic Giant Branch Stars and Presolar Silicon Carbide Grains

open access: yesUniverse, 2022
Presolar grains are microscopic dust grains that formed in the stellar winds or explosions of ancient stars that died before the formation of the solar system.
Nan Liu, Sergio Cristallo, Diego Vescovi
doaj   +1 more source

The sporadic radiant and distribution of meteors in the atmosphere as observed by VHF radar at Arctic, Antarctic and equatorial latitudes [PDF]

open access: yesAnnales 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

Determination of meteor-head echo trajectories using the interferometric capabilities of MAARSY [PDF]

open access: yesAnnales Geophysicae, 2013
During the flight of a meteoroid through the neutral atmosphere, the high kinetic energy is sufficient to ionize the meteoric constituents. Radar echoes coming from plasma irregularities surrounding the meteoroids are called meteor-head echoes, and ...
C. Schult   +3 more
doaj   +1 more source

First results of optical meteor and meteor trail irregularity from simultaneous Sanya radar and video observations

open access: yesEarth 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

THE HALF-YEAR MONITORING OF METEOROID INFLUX TO THE NEAR-EARTH SPACE BY TV-OBSERVATIONS

open access: yesOdessa Astronomical Publications, 2017
The Astronomical Institute of Russian Academy of Science provides TV-meteor observations since 2000. We began them with hybrid camera for Space Control Survey, but now we use 6 simple wide-angle Patrol Camera (PatrolCa) for every-night monitoring of ...
A. P. Kartashova   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy