Results 41 to 50 of about 568 (186)
Symposium - International Astronomical Union, 1968 Regular and numerous measurements of individual radiants and velocities of meteors were carried out in Jodrell Bank (Davies and Gill, 1960), Kharkov (Kaščeev et al., 1960; Kaščeev and Lebedinec, 1961), Adelaide (Nilsson, 1964) and as part of the Harvard Radio Meteor Project in U.S.A. (Hawkins, 1962).
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Journal of Field Robotics, Volume 43, Issue 7, Page 4475-4514, October 2026.ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang +3 more
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Letter to the Editior
Testing the hypothesis of the influence of neutral turbulence on the deduction of ambipolar diffusivities from meteor trail expansion [PDF]
Annales Geophysicae, 2005 Fading times of radar echoes from underdense meteor trails in the upper mesosphere/lower thermosphere are commonly used to determine ambipolar diffusivities and hence ambient temperature.
C. M. Hall +5 more
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Water Resources Research, Volume 62, Issue 10, October 2026.Abstract The internal recharge dynamics of karst aquifers are difficult to resolve with traditional outlet‐based indicators, owing to their heterogeneous structure and nonlinear response. To address this, we propose a non‐invasive anomaly detection framework based on a Temporal Convolutional AutoEncoder (TCAE), which integrates high‐frequency ...
Yinxia Zhu +6 more
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.Abstract A spectrally resolved observational methodology is introduced to estimate mesoscale momentum flux frequency spectra in the mesosphere and lower thermosphere (MLT). The method is applied to four‐dimensional wind fields reconstructed with the physics‐informed neural network approach called the Hydrodynamic Point‐wise Environment Reconstructor ...
G. Mitra +5 more
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Radar and optical leonids [PDF]
Atmospheric 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
On the influence of neutral turbulence on ambipolar diffusivities deduced from meteor trail expansion [PDF]
Annales Geophysicae, 2002 By measuring fading times of radar echoes from underdense meteor trails, it is possible to deduce the ambipolar diffusivities of the ions responsible for these radar echoes.
C. M. Hall, C. M. Hall
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Space Weather, Volume 24, Issue 10, October 2026.Abstract Shortwave fadeout (SWF) is a typical dayside high‐frequency radio disturbance caused by solar flare‐induced ionospheric ionization enhancement. Using newly built Chinese Dual Auroral Radar Network (CN‐DARN) observations, we investigate two X‐flare‐driven SWFs during the May 2024 geomagnetic superstorm (SYM‐H = −518 nT), on 10 May (pre‐storm ...
Junjie Tong +9 more
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Meteor fluxes and visual magnitudes from EISCAT radar event rates: a comparison with cross-section based magnitude estimates and optical data [PDF]
Annales Geophysicae, 1998 Incoherent scatter radars (ISR) are versatile instruments for continuous monitoring of ionisation processes in the Earth's atmosphere. EISCAT, The European Incoherent Scatter facility has proven effective also in meteor studies. The time resolution of
A. Pellinen-Wannberg +3 more
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The Altitude Effect of Stable Isotopes in Rivers Over the Tibetan Plateau
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract The altitude effect of stable isotopes in river water is key to paleoelevation reconstruction, yet remains poorly quantified at regional scales due to monitoring challenges. This study compiled river water isotope data across the Tibetan Plateau and used a decision‐tree‐based random forest model to simulate high‐resolution δ18O patterns.
Yakui Chen +3 more
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