Title :
Volume-imaging UHF radar measurement of atmospheric turbulence
Author :
Li, Jie ; Lopez-Dekker, Francisco J. ; Ince, Turker ; Frasier, Stephen J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
Abstract :
The Turbulent Eddy Profiler (TEP) is a volume-imaging 915 MHz radar designed for atmospheric boundary layer turbulence studies. TEP is a pulsed, phased-array radar using digital beamforming techniques to provide four-dimensional images of refractive index fluctuations and wind vectors on grid scales comparable to those of large-eddy simulations. During October 1999, TEP was deployed during the Cooperative Atmospheric Surface Exchange Study (CASES´99) held near Wichita, KS. The authors present observations from this experiment which focused on the evolution and dynamics of the stably-stratified nocturnal boundary layer. Unlike the convective boundary layer, radar echoes are characterized by intermittent bursts of shear-induced turbulence. The scales of turbulence features are generally smaller than the resolution of the UHF radar. This is demonstrated by comparison with a co-located S-band FMCW radar. Estimation of turbulence intensity is also complicated by the presence of significant bird and insect scatter
Keywords :
atmospheric boundary layer; atmospheric techniques; atmospheric turbulence; meteorological radar; remote sensing by radar; 915 MHz; CASES´99; Kansas; Turbulent Eddy Profiler; UHF radar; USA; United States; Wichita; atmosphere; boundary layer; digital beamforming; large-eddy simulation; measurement technique; meteorological radar; phased-array radar; radar remote sensing; refractive index fluctuations; shear-induced turbulence; turbulence; volume imaging radar; Array signal processing; Atmospheric modeling; Calibration; Electromagnetic heating; Laboratories; Phased arrays; Radar imaging; Radar measurements; Radar remote sensing; Spatial resolution;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-6359-0
DOI :
10.1109/IGARSS.2000.859724