Abstract: A method for detecting oil at the sea by means of a coherent oil spill radar with a transmitter and a receiver antenna includes the transmitter and receiver antenna being directed towards a sea surface in the near area out to a given distance of 1000-4000 m under a grazing angle of between 0.5 and 30 degrees, the transmitter antenna transmits at a frequency between 2 GHz and 18 GHz, and frequency modulated with an adjustable bandwidth and with a given transmitted effect less than 10 W. The transmitter antenna has a horizontal antenna lobe smaller than its vertical antenna lob. The transmitter and receiver antenna are controlled electronically to transmit and detect vertical polarization and horizontal polarization, with an adjustable modulation time of less than 4 ms between the polarizations.

Abstract: A method for detecting oil at the sea by means of a coherent oil spill radar with a transmitter and a receiver antenna includes the transmitter and receiver antenna being directed towards a sea surface in the near area out to a given distance of 1000-4000 m under a grazing angle of between 0.5 and 30 degrees, the transmitter antenna transmits at a frequency between 2 GHz and 18 GHz, and frequency modulated with an adjustable bandwidth and with a given transmitted effect less than 10 W. The transmitter antenna has a horizontal antenna lobe smaller than its vertical antenna lob. The transmitter and receiver antenna are controlled electronically to transmit and detect vertical polarization and horizontal polarization, with an adjustable modulation time of less than 4 ms between the polarizations.