Application of Wuhan Ionospheric Oblique Backscattering Sounding System (WIOBSS) for Sea-State Detection

To combine the advantages of long detection range and small antenna array, the newly designed Wuhan Ionospheric Oblique Backscattering Sounding System (WIOBSS) transmits radio waves by ionospheric reflection and receives oceanic backscattered ground waves. To combine the functions of operating frequency selection and sea-state detection, WIOBSS can transmit the interpulse coding wave and frequency-modulated continuous wave waveforms in one hardware platform. The hardware and software of the radio system are introduced. A sky-wave over-the-horizon sea-state detection experiment was carried out in Chongyang and Longhai, China, on January 28, 2015. The observations of the oceanic surface echoes 130-300 km from the coastline are also presented.