Results 31 to 40 of about 7,805 (237)

A simple method for retrieving significant wave height from Dopplerized X-band radar [PDF]

Ocean Science, 2017
Retrieving spectral wave parameters such as the peak wave direction and wave period from marine radar backscatter intensity is very well developed.
R. Carrasco, M. Streßer, J. Horstmann
doaj   +1 more source

Meridional motions of the afternoon radar aurora, auroral electrojets, and absorption patches under variable IMF conditions [PDF]

, 2004
International audienceThe meridional motions of the CUTLASS HF and STARE VHF coherent echoes, IMAGE equivalent electrojet currents, and IRIS absorption patches during the postnoon/early-evening event of 14 February 2000 are presented.
Uspensky, M. V., M. V. Uspensky, Koustov, A. V., Makarevitch, R. A., F. Honary, Honary, F., R. A. Makarevitch, A. V. Koustov   +7 more
core   +1 more source

On the factors controlling occurrence of F-region coherent echoes [PDF]

, 2002
International audienceSeveral factors are known to control the HF echo occurrence rate, including electron density distribution in the ionosphere (affecting the propagation path of the radar wave), D-region radio wave absorption, and ionospheric ...
T. Ogawa, S. Nozawa, A. V. Koustov, D. Andre (7667897), Milan, S.E., D. W. Danskin, Nozawa, S., T. Ogawa (4008053), S. E. Milan (7594526), N. Nishitani, D. Andre, Milan, S. E., Lester, M., S. Nozawa (7672178), D. W. Danskin (7613489), N. Nishitani (7672181), Danskin, D. W., Ogawa, T., M. Lester, A. V. Koustov (7613492), M. Lester (7589660), Andre, D., S. E. Milan, Koustov, A.V., Koustov, A. V., Nishitani, N., Danskin, D.W.   +26 more
core   +1 more source

VHF coherent radar signals from the E region ionosphere and the relationship to electron drift velocity and ion acoustic velocity [PDF]

, 2002
The Scandinavian Twin Auroral Radar Experiment (STARE) coherent radar system measures the Doppler shifts caused by ∼1 m plasma waves in the high-latitude E region ionosphere.
Nielsen, E., del Pozo, C., del Pozo, C. F., Del-Pozo, Carlos, Williams, P., Williams, P. J. S.   +5 more
core   +1 more source

Tower-based C-band radar measurements of an alpine snowpack [PDF]

The Cryosphere
To better understand the interactions between C-band radar waves and snow, a tower-based experiment was set up in the Idaho Rocky Mountains for the period of 2021–2023.
I. Brangers, H.-P. Marshall, G. De Lannoy, D. Dunmire, C. Mätzler, H. Lievens, H. Lievens   +6 more
doaj   +1 more source

Observation and characterization of radar backscatter over Greenland [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 2005
Characterization of the microwave signature of the Greenland snow surface enables delineation of the different snow facies and is a tool for tracking the effects of climate change. A new empirical observation model is introduced that uses a limited number of parameters to characterize the snow surface based on the dependence of radar backscatter on ...
Ivan S. Ashcraft, David G. Long
openaire   +1 more source

A first comparison of irregularity and ion drift velocity measurements in the E-region [PDF]

, 2006
International audienceE-region irregularity velocity measurements at large flow angles with the STARE Finland coherent VHF radar are considered in context of the ion and electron velocity data provided by the EISCAT tristatic radar system, CUTLASS ...
J. A. Davies, A. Senior, Makarevich, R. A., P. L. Dyson, Milan, S. E., I. W. McCrea, Honary, F., A. V. Koustov, Dyson, P. L., R. A. Makarevich, Senior, A., V. S. C. Howells, Davies, J. A., S. E. Milan, Koustov, A. V., Howells, V. S. C., McCrea, I. W., F. Honary   +17 more
core   +1 more source

Radar Backscatter and Crop Residues

Canadian Journal of Remote Sensing, 1996
RESUMEIl est difficile d'isoler les effets produits par les residus de culture sur la retrodiffusion radar en raison de la confusion avec les effets dus au travail du sol. Cette etude avait pour objet de quantifier les effets produits par les residus de culture sur la retrodiffusion radar independamment du travail du sol.
A.M. Smith, D.J. Major
openaire   +1 more source

Simultaneous HF measurements of E- and F-region Doppler velocity at large flow angles [PDF]

, 2004
International audienceData collected by the CUTLASS Finland HF radar are used to illustrate the significant difference between the cosine component of the plasma convection in the F-region and the Doppler velocity of the E-region coherent echoes observed
Koustov, A. V., Makarevitch, R. A., F. Honary, Honary, F., R. A. Makarevitch, A. V. Koustov   +5 more
core   +1 more source

Winter accumulation in the percolation zone of Greenland measured by airborne radar altimeter [PDF]

, 2007
We here determine the surface elevation and the winter snow accumulation rate along a profile in the percolation zone of the Greenland Ice Sheet from data collected with ESA's Airborne SAR/Interferometric Radar Altimeter System (ASIRAS) in spring 2004 ...
Nienow, P, Helm, Veit, Nienow, Peter, Cullen, R, Helm, V., Rack, W, Mair, D., Wingham, D. J., Rack, Wolfgang, Cullen, R., Mair, D, Parry, V., Wrack, W., Wingham, DJ, Helm, V, Parry, V, Wingham, D., Nienow, P.   +17 more
core   +1 more source