INTENSITY OF ATMOSPHERIC MOTIONS IN THE MABL …
Intensity of atmospheric motions in the mabl retrieved from ocean surface radar imagery
M. Mityagina
E-mail: mityag@iki.rssi.ru
Abstract. The paper is dedicated to the theory and practice of analysis of radar images of sea surface, obtained under unstable atmospheres. In this case, the sea surface reveals wind field variations in the marine atmospheric boundary layer (MABL) caused by atmospheric convec-tive processes, accompanied by air motions with mainly vertical direction. Changes in radar manifestations of convection signatures are connected with the degree of thermodynamic instability of the atmosphere.
1. Instruments used
THE ALMAZ-1 SAR IS AN S-BAND RADAR (WAVELENGTH OF 9.6CM) WORKING AT HORIZONTAL (HH) POLARIZATION AND ILLUMINATING A SWATH OF 40 X 240 KM WITH A SPATIAL RESOLUTION OF (10-15) M.
THE AIRBORNE RADAR IS A KU-BAND (WAVELENGTH OF 2.25CM) INSTRUMENT. TWO CYLINDRICAL ANTENNAS, ONE ON EACH SIDE OF THE AIRCRAFT, TRANSMIT AND RECEIVE ALTERNATE PULSES OF HORIZONTAL AND VERTICAL POLARI-ZATION AT LARGE INCIDENCE ANGLES OF (72 - 84)( TO PRODUCE SIMULTANEOUS HH AND VV IMAGES. THE RADAR ILLUMINATES A SWATH OF 12.5 KM ON EACH SIDE OF THE GROUND TRACK WITH A SPATIAL RESOLUTION OF ABOUT 25 X 25 METERS.
Besides, images from ERS 2 SAR are also used. The main cha-racteristics ERS SAR are: spatial resolution: along track ................
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