Simulation of coherent radar backscatter from dynamic sea surfaces

2004 ◽  
Author(s):  
J.V. Toporkov ◽  
M.A. Sletten
Keyword(s):  
Radar Backscatter ◽  
Coherent Radar

scholarly journals A comparison of satellite scintillation measurements with HF radar backscatter characteristics

2005 ◽  
Vol 23 (11) ◽  
pp. 3451-3455 ◽  
Author(s):  
S. E. Milan ◽  
S. Basu ◽  
T. K. Yeoman ◽  
R. E. Sheehan
Keyword(s):  
Broad Spectrum ◽  
High Latitude ◽  
Auroral Zone ◽  
Intersection Point ◽  
Density Fluctuations ◽  
Hf Radar ◽  
Ionospheric Scintillation ◽  
Radar Backscatter ◽  
Density Perturbations ◽  
Coherent Radar

Abstract. We examine the correspondence between high latitude ionospheric scintillation measurements made at 250MHz with the occurrence of 10MHz HF coherent radar backscatter, on 13 and 14 December 2002. We demonstrate that when the ionospheric intersection point of the scintillation measurements is co-located with significant HF radar backscatter, the observed scintillation, quantified by the S4 index, is elevated. Conversely, when the radar indicates that backscatter is observed away from the intersection point due to movements of the auroral zone, the observed scintillation is low. This suggests that scintillation is highly location-dependent, being enhanced in the auroral zone and being lower at sub-auroral latitudes. The coexistence of scintillation and HF radar backscatter, produced by ionospheric density perturbations with scale sizes of 100s of metres and ~15 m, respectively, suggests that a broad spectrum of density fluctuations is found in the auroral zone.

Doppler processing of coherent radar backscatter for ocean surface wave measurements

2010 ◽  
Author(s):  
Paul A. Hwang ◽  
Mark A. Sletten ◽  
Jakov V. Toporkov ◽  
Dennis B. Trizna
Keyword(s):  
Surface Wave ◽  
Ocean Surface ◽  
Radar Backscatter ◽  
Wave Measurements ◽  
Ocean Surface Wave ◽  
Coherent Radar

scholarly journals Polarization of ellipticEregion plasma irregularities and implications for coherent radar backscatter from Farley-Buneman waves

Radio Science ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
D. L. Hysell ◽  
J. Drexler
Keyword(s):  
Radar Backscatter ◽  
Plasma Irregularities ◽  
Coherent Radar

Three-Dimensional Coherent Radar Backscatter Model and Simulations of Scattering Phase Center of Forest Canopies

2010 ◽  
Vol 48 (1) ◽  
pp. 349-357 ◽  
Author(s):  
Dawei Liu ◽  
Guoqing Sun ◽  
Zhifeng Guo ◽  
K.J. Ranson ◽  
Yang Du
Keyword(s):  
Three Dimensional ◽  
Radar Backscatter ◽  
Phase Center ◽  
Forest Canopies ◽  
Scattering Phase ◽  
Coherent Radar

scholarly journals Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter

2002 ◽  
Vol 20 (9) ◽  
pp. 1487-1498 ◽  
Author(s):  
L. J. Baddeley ◽  
T. K. Yeoman ◽  
D. M. Wright ◽  
J. A. Davies ◽  
K. J. Trattner ◽  
...  
Keyword(s):  
Radar Data ◽  
Hf Radar ◽  
Wave Number ◽  
Mhd Waves ◽  
Small Scale ◽  
Ion Distribution ◽  
Radar Backscatter ◽  
Morning Sector ◽  
Ionospheric Electric Field ◽  
Coherent Radar

Abstract. HF radar backscatter, which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø, has provided coherent radar ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by both the CUTLASS HF radars and the EISCAT UHF radar. Data from the SP-UK-OUCH experiment have revealed small-scale (high azimuthal wave number, m <approx> -45) waves, predominantly in the morning sector, thought to be brought about by the drift-bounce resonance processes. Conjugate observations from the Polar CAM-MICE instrument indicate the presence of a non-Maxwellian ion distribution function. Further statistical analysis has been undertaken, using the Polar TIMAS instrument, to reveal the prevalence and magnitude of the non-Maxwellian energetic particle populations thought to be responsible for generating these wave types.Key words. Ionosphere (active experiments; wave-particle interactions) Magnetospheric physics (MHD waves and instabilities)

On type 3 auroral VHF coherent radar backscatter

1992 ◽  
Vol 97 (A4) ◽  
pp. 4109 ◽  
Author(s):  
C. Haldoupis ◽  
K. Schlegel ◽  
E. Nielsen
Keyword(s):  
Radar Backscatter ◽  
Coherent Radar ◽  
Type 3

scholarly journals Coordinated study of coherent radar backscatter and optical airglow depletions in the central Pacific

2010 ◽  
Vol 115 (A6) ◽  
pp. n/a-n/a ◽  
Author(s):  
E. S. Miller ◽  
J. J. Makela ◽  
K. M. Groves ◽  
M. C. Kelley ◽  
R. T. Tsunoda
Keyword(s):  
Central Pacific ◽  
Radar Backscatter ◽  
Coherent Radar
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