Results 91 to 100 of about 7,805 (237)

First simultaneous observations of flux transfer events at the high-latitude magnetopause by the cluster spacecraft and pulsed radar signatures in the conjugate ionosphere by the CUTLASS and EISCAT radars [PDF]

, 2001
Cluster magnetic field data are studied during an outbound pass through the post-noon high-latitude magnetopause region on 14 February 2001. The onset of several minute perturbations in the magnetospheric field was observed in conjunction with a ...
A. Balogh (7591361), S. W. H. Cowley, H. Khan, Balogh, A., Georgescu, E., J. A. Davies (4412452), T. K. Yeoman (7601525), J. A. Wild (7591442), T. K. Yeoman, M. W. Dunlop, Stanley William Herbert Cowley (7627505), G. Provan, Dunlop, M. W., Yeoman, T. K., S. E. Milan (7594526), E. Georgescu, J. A. Davies, Fornacon, K.-H., G. Provan (7602020), M. W. Dunlop (7591493), H. Khan (723527), Milan, S. E., Provan, G., Lester, M., K.-H. Fornaçon, K. H. Fornacon (7612235), Wild, J. A., Khan, H., J. A. Wild, M. Lester, A. Balogh, M. Lester (7589660), Davies, J. A., S. E. Milan, Cowley, S. W. H., E. Georgescu (7612238)   +35 more
core   +1 more source

Simultaneous Generation of Topographic Models and Manning Roughness Coefficient Maps From Tri‐Stereoscopic Satellite Images: Application to the Huarmey River, Peru

The Photogrammetric Record, Volume 41, Issue 195, July/September 2026.
Tri‐stereoscopic PeruSat‐1 imagery enables the simultaneous generation of 0.70 m‐resolution topography and spatially distributed Manning roughness maps, achieving 0.434 m vertical accuracy. Integrated into HEC‐RAS, these products provide consistent, high‐resolution inputs that improve hydraulic modelling and flood risk assessment in data‐scarce river ...
Jorge L. Miranda‐Pita, Pedro A. Plaza‐Álvarez, Jorge Lopez‐Rebollo, Diego González‐Aguilera   +3 more
wiley   +1 more source

Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence [PDF]

, 2003
In recent years, large electron temperature increases of 300% (3000 K above background) caused by powerful HF-radio wave injection have been observed during nighttime using the EISCAT incoherent scatter radar near Tromsø in northern Norway.
Rietveld, M. T., Kosch, M., Leyser, T., Kosch, Mike J., Rietveld, M., Leyser, T. B., Blagoveshchenskaya, N., Blagoveshchenskaya, N. F., Kornienko, V. A., Yeoman, T. K., Kornienko, V., Yeoman, T.   +11 more
core   +1 more source

Joint Monitoring of Ground and Sky for Cereal Crops Based on Scatterometer Measurement and ASAR Imagesb

Journal of Electronic Science and Technology, 2019
The joint monitoring of the ground and sky for cereal crops based on microwave data has become a popular method for researches on earth surface objects.
Lei He, Feng-Jin Xiao
doaj   +1 more source

Imminent Localized Precipitation Preceded by a Surge in Cloud‐Base Descent and Reflectivity

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The nowcasting of localized precipitation (LP) is often limited by insufficient observation of the vertical cloud evolution preceding rainfall. Here we systematically tracked rapid cloud development within 2 hr before LP onset, utilizing cloud data collected in 2024 from the millimeter‐wavelength cloud radar network across China, together with
Zhen Zhang, Jianping Guo, Ning Li, Jianbo Deng, Weilong Deng, Yuping Sun, Yifei Wang, Shuairu Jiang, Liping Zeng, Feng Ma, Tianmeng Chen   +10 more
wiley   +1 more source

Modern spectral analysis in HF radar remote sensing. [PDF]

, 1998
High-Frequency (HF) radar systems are currently used to collect wave data. By applying spectral analysis methods, such as the Fast Fourier Transform (FFT) method, to the radar backscatter from the ocean surface, the so-called Doppler spectrum is ...
Vizinho, A., Vizinho, A
core  

Estimation of glacier ice extinction using long-wavelength airborne Pol-InSAR

, 2013
In recent years there has been increased interest in using synthetic aperture radar (SAR) to study and monitor glaciers and ice sheets for glaciological and climate change research.
Sharma, Jayanti, Hajnsek, Irena, Moreira, Alberto, Papathanassiou, Konstantinos   +3 more
core   +1 more source

Interhemispheric comparison of spectral width boundary as observed by the SuperDARN radars [PDF]

, 2003
International audiencePrevious studies have shown that dayside equatorward edge of coherent HF radar backscatter having broad Doppler spectral width is coincident with the equatorward edge of the cusp particle precipitation.
Milan, S. E., N. Sato, T. Iyemori, T. Iyemori (7616135), Woodfield, E.E., Lester, M., A. S. Yukimatu, A. S. Yukimatu (7614353), M. Lester, N. Sato (7606136), Milan, S.E., M. Lester (7589660), K. Hosokawa, S. E. Milan, Yukimatu, A. S., Iyemori, T., K. Hosokawa (7606139), Hosokawa, K., E. E. Woodfield (7590071), E. E. Woodfield, Sato, N., Yukimatu, A.S., S. E. Milan (7594526), Woodfield, E. E.   +23 more
core   +1 more source

The Turbulence Properties of 150‐km Echoes in the Lower Ionosphere

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The valley region ionosphere spans from approximately 120–200 km in altitude, and hosts a wide range of plasma, neutral, and solar interactions that create and maintain the ionosphere. In this region a ubiquitous and mysterious source of radar echoes called “150‐km echoes” has been observed since the 1960s.
William J. Longley, Lindsay V. Goodwin, Chirag R. Skolar, Nicholas M. Pedatella   +3 more
wiley   +1 more source

Aspect angle dependence of the E region irregularity velocity at large flow angles [PDF]

, 2007
We present the Doppler velocity observations of 1-m plasma waves in the auroral E region by the Scandinavian Twin Auroral Radar Experiment (STARE) Norway VHF coherent radar in the context of simultaneous and coincident measurements of electron and ion ...
Senior, Andrew, Uspensky, M., Makarevich, R. A., Koustov, A. V., Honary, Farideh, Dyson, P. L.   +5 more
core