Surface measurement by using a fixed antenna microwave pulse Doppler radar in Sagami-bay off Hiratsuka in Japan

A sea surface measurement system by using a microwave pulse Doppler radar has been developed. It can measure sea surface waves, sea surface currents and a sea level at one time only with the use of mathematical relations without the necessity of using any empirical relations. From September 2009 to January 2010, sea surface conditions had been measured by using a X-band microwave pulse Doppler radar at 1 km off Hiratuska in Sagami-bay, Japan. Algorithms for obtaining of sea surface conditions from the backscattering microwaves measured by a pulse Doppler radar and some measurement results are shown in this paper. The radar measured shoaling phenomena clearly. The increasing rate of wave height became larger in proportion to the square of the wave orbital velocity.