Results 101 to 110 of about 223,361 (218)

Simultaneous Retrieval of PWV and VTEC by Low‐Cost Multi‐GNSS Single‐Frequency Receivers

Earth and Space Science, 2019
Precipitable water vapor (PWV) and ionospheric vertical total electron content (VTEC) are two essential components of space‐atmosphere parameters. The zenith troposphere delay can be converted into PWV, which plays a crucial role in meteorological ...
Chuanbao Zhao, Baocheng Zhang, Wei Li, Yunbin Yuan, Min Li   +4 more
doaj   +1 more source

First Quantitative Results on the Response of Green and Red Line Dayglow Emissions to Solar Flares of Different Magnitudes

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Flares originate from the impulsive release of magnetic energy in the solar atmosphere. The rise in X‐ray flux enhances ionization/electron content in the upper atmosphere, modifying the photochemical and dynamical processes that govern the ionosphere‐thermosphere behavior.
Komal, Duggirala Pallamraju
wiley   +1 more source

Differential measurement of atmospheric refraction with a telescope with double fields of view

, 2015
For the sake of complete theoretical research of atmospheric refraction, the atmospheric refraction under the condition of lower angles of elevation is still worthy to be analyzed and explored.
Cao, Jian-Jun, Luo, Hao, Tang, Zheng-Hong, Yu, Yong, Zhao, Ming   +4 more
core   +1 more source

Do Eclipse‐Induced Thermospheric TADs Originate From Above or Below?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Solar eclipses generate significant wave activity in the Earth's upper atmosphere. The source region of eclipse‐induced Traveling Atmospheric Disturbances (TADs) in the upper thermosphere—particularly the relative contributions of gravity waves from the thermosphere itself versus the lower atmosphere—remains unknown. Using the Whole Atmosphere
Yu Jiao, Jing Liu, Shuhan Li, Joseph M. McInerney, Jianyong Li, Yuyan Yang   +5 more
wiley   +1 more source

Sudden Ionospheric Disturbances Generated by Solar Flares—Not so Sudden?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract It is known that solar flares generate instantaneous ionization enhancement, referred to as sudden ionospheric disturbance (SID), that occurs simultaneously across the entire dayside. In this work, we use high‐rate 1‐s data of total electron content (TEC) to analyse ionospheric response to 13 solar flares that occurred in 2003–2023.
B. Maletckii, E. Astafyeva, N. M. Pedatella, L. Qian   +3 more
wiley   +1 more source

Detection of Radio Emission from Fireballs

, 2014
We present the findings from the Prototype All-Sky Imager (PASI), a backend correlator of the first station of the Long Wavelength Array (LWA1), which has recorded over 11,000 hours of all-sky images at frequencies between 25 and 75 MHz.
Dowell, J., Ellingson, S. W., Hartman, J. M., Helmboldt, J. F., Henning, P. A., Kavic, M., Obenberger, K. S., Schinzel, F. K., Simonetti, J. H., Stovall, K., Taylor, G. B., Wilson, T. L.   +11 more
core   +1 more source

Measurement report: Can zenith wet delay from GNSS “see” atmospheric turbulence? Insights from case studies across diverse climate zones [PDF]

Atmospheric Chemistry and Physics
Global navigation satellite system (GNSS) microwave signals are nearly unaffected by clouds but are delayed as they travel the troposphere. The hydrostatic delay accounts for approximately 90 % of the total delay and can be modelled well as a function of
G. Kermarrec, X. Calbet, Z. Deng, C. Carbajal Henken   +3 more
doaj   +1 more source

Limits on the Position Wander of Sgr A*

, 2008
We present measurements with the VLBA of the variability in the centroid position of Sgr A* relative to a background quasar at 7-mm wavelength. We find an average centroid wander of 71 +/- 45 micro-arcsec for time scales between 50 and 100 min and 113 +/-
Abraham Loeb, Andreas Brunthaler, Avery E. Broderick, Broderick A. E., Gillessen S., Mareki Honma, Mark J. Reid, Romani R. W.   +7 more
core   +1 more source

GPS Zenith Total Delay Estimation in the Mediterranean Area for Climatological and Meteorological Applications

Journal of Atmospheric and Oceanic Technology, 2003
Abstract A ground network of global positioning system (GPS) receivers is a powerful source of continuous integrated precipitable water vapor (IPWV) data that can be suitable for weather prediction and climate studies. The technical features of two different GPS data analysis strategies, one for climatological and the other for meteorological ...
R. Pacione, F. Vespe
openaire   +1 more source

Experimental Evidence of Giant Electron - Gamma Bursts Generated by Extensive Atmospheric Showers in Thunderclouds

, 2004
The existence of a new phenomena - giant electron-gamma bursts is established. The bursts are generated in thunderclouds as a result of the combined action of runaway breakdown and extensive atmosphere showers (RB-EAS).
A.N. Karashtin, A.P. Chubenko, A.S. Shepetov, A.V. Gurevich, Aleksandrov, Alexeenko, Aseikin, Babich, Bazelyan, Belenkij, Brunetti, Chubenko, Chubenko, Coleman, Dwyer, Eack, Gurevich, Gurevich, Gurevich, Gurevich, Gurevich, Gurevich, Gurevich, Gurevich, Gurevich, Gurevich, Gurevich, Jelly, K.P. Zybin, Kusukuse, L.I. Vildanova, L.M. Duncan, Lehtinen, M.O. Ptitsyn, MacGorman, Marshall, McCarthy, Roussel-Dupre, Roussel-Dupre, S.V. Kryukov, Suga, Torii, V.A. Ryabov, V.P. Antonova, V.V. Piscal, Wilson, Yu.V. Shlyugaev   +46 more
core   +1 more source