Title :
Digital two dimensional synthesis and measurement of sea wave spectra using coastal UHF radar
Author :
Kolev, Nickolai ; Alexandrov, Chavdar ; Draganov, Ancho
Author_Institution :
Dept. of Radar & Acoust. Eng., Higher Marine Sch., Varna, Bulgaria
Abstract :
Describes a spectral approach for synthesis and analysis of radar image of the sea surface at the output of a radar receiver. The sea surface is presented as a field with an analytical spectrum, depending on the wind speed and direction. A radar sea spectrum is synthesized using the radar impulse response and the convolution theorem. From this spectra a radar sea image is generated using an inverse Fourier transform. Another simulation approach is presented as well. A 2D recursive digital filter of second order is used with given statistical properties. A δ-field is convolved with this filter for sea image simulation. Simulated images are presented in the first and in the second case. Experimental raw radar sea images are formed by coastal radar in Varna Bay, Black Sea. A comparison is made between estimated spectra of raw radar images and the synthesized images
Keywords :
geophysical signal processing; ocean waves; oceanographic techniques; radar applications; radar imaging; radar signal processing; recursive filters; remote sensing by radar; δ-field; 2D recursive digital filter; coastal UHF radar; convolution theorem; digital two dimensional synthesis; inverse Fourier transform; measurement technique; ocean wave; radar impulse response; radar remote sensing; sea image simulation; sea surface; sea wave spectra; second order; spectral approach; Convolution; Digital filters; Fourier transforms; Image analysis; Image generation; Radar imaging; Radar theory; Sea measurements; Sea surface; Wind speed;
Conference_Titel :
OCEANS '95. MTS/IEEE. Challenges of Our Changing Global Environment. Conference Proceedings.
Print_ISBN :
0-933957-14-9
DOI :
10.1109/OCEANS.1995.528546
