Results 61 to 70 of about 568 (186)

Radiant measurement accuracy of micrometeors detected by the Arecibo 430 MHz Dual-Beam Radar [PDF]

Atmospheric Chemistry and Physics, 2004
Precise knowledge of the angle between the meteor vector velocity and the radar beam axis is one of the largest source of errors in the Arecibo Observatory (AO) micrometeor observations. In this paper we study ~250 high signal-to-noise ratio (SNR) meteor
D. Janches, D. Janches, M. C. Nolan, M. Sulzer   +3 more
doaj  

Latitudinal Dependence of the Geomagnetic and Solar Activity Effect on Sporadic‐E Layer

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Based on the global COSMIC occultation data, the latitudinal dependence of the geomagnetic and solar activity effect on the sporadic‐E (Es) layer is statically investigated. At middle geomagnetic latitudes, Es occurrence rates generally decrease with increasing solar activity, except during winter and spring in the Southern Hemisphere.
Qiong Tang, Wenjun Liu, Yuqiang Zhang, Ren Zhang, Zhibin Yu   +4 more
wiley   +1 more source

5. Long-term variations in meteor radar rates, meteor heights and radar-echo amplitudes [PDF]

Symposium - International Astronomical Union, 1968
An analysis of meteor radar rates, meteor end-point heights and radar-echo amplitudes observed over the period 1953–66 indicates a long-term variation in these quantities with highest values being recorded in 1963 near solar minimum. The phenomenon is explained in terms of a solar-controlled variation in air density at the 90- to 110-km level, with ...
openaire   +1 more source

The radiant distribution of AMOR radar meteors [PDF]

Monthly Notices of the Royal Astronomical Society, 2005
A large data set provided by the highly sensitive Advanced Meteor Orbit Radar (AMOR) facility is used to investigate the structure of the sporadic meteor complex. The helion, antihelion and apex apparent sources are clearly found. Observational bias is then removed to reveal the true source distributions as observed on Earth. A long-standing problem in
D. P. Galligan, W. J. Baggaley
openaire   +1 more source

TITAN‐LSTM: A Weather Radar Nowcasting Tool

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract Precipitation nowcasting is essential for a wide range of meteorological and hydrological applications, and weather radar plays a central role in this task. Extrapolation algorithms such as TITAN (Thunderstorm Identification, Tracking, Analysis and Nowcasting) provide efficient storm tracking but do not directly use rainfall rate fields, while
Andrea S. Viteri López, Carlos A. Morales Rodriguez   +1 more
wiley   +1 more source

Observations of meteor showers with the meteor radar of KFU [PDF]

Contributions of the Astronomical Observatory Skalnaté Pleso, 2021
S. Kalabanov, D. Korotyshkin, R. Ishmuratov, O. Sherstykov, F. Valiullin   +4 more
openaire   +1 more source

EU Space Law and Earth's Boundaries: Integrating Environmental Impact Assessment and Corporate Due Diligence

Global Policy, Volume 17, Issue S3, Page S34-S45, August 2026.
ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley   +1 more source

Interannual Variability of Mean Winds and the Semidiurnal Tide in the Antarctic Summer Mesosphere‐Lower Thermosphere

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract Long‐term observations at southern polar latitudes in the summertime mesosphere–lower thermosphere (MLT) reveal persistent nonmigrating semidiurnal tides, with the zonal wavenumber‐1 (s $s$ = 1) component being particularly dominant. Using nearly two decades of meteor radar wind measurements (80–100 km) from Davis Station (East Antarctica) and
R. A. Vincent, J.‐H. Kim, C. Lee, G. Jee, D. J. Murphy, I. M. Reid   +5 more
wiley   +1 more source

First Kinetic 3‐D Simulations of the High‐Latitude Electrojet Spanning an Entire Turbulent Flux Tube

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Radar and rocket observations of the terrestrial ionosphere frequently measure turbulent plasma waves, especially during geospace storms. The non‐linear behavior of these waves remains poorly characterized. This paper presents the first fully kinetic 3‐D particle‐in‐cell simulations of Farley–Buneman (FB) turbulence spanning an entire high ...
Meers Oppenheim, Y. Dimant, R. Koontaweepunya, A. Q. Green, S. Evans   +4 more
wiley   +1 more source

Research on Kalman Filter Assimilation Technology for Wind Field Information from Qujing Meteor Radar

Remote Sensing
All-sky meteor radars are widely employed to observe the near-space atmospheric wind field, a crucial parameter of the near-space environment. Owing to the spatiotemporal uncertainty in meteor count distribution, meteor radars may encounter measurement ...
Xingxin Sun, Chunhua Jiang, Jian Feng, Yi Liu, Yewen Wu, Tong Xu, Jiandong Qiao, Zhongxin Deng, Chen Zhou, Yuqiang Zhang   +9 more
doaj   +1 more source