IEEE Transactions on Geoscience and Remote Sensing · 1992 · 80 citations · 18 references
Natural SciencesEarth SciencesOceanographyAntennasOcean WavesRemote SensingRadar AntennasRadar InstrumentationRadar SystemsWave Measurement InstrumentsWave MeasurementsWave SpectraDirectional Wave SpectraGain PatternMarine Radar InstrumentationModulation Transfer FunctionModulation Transfer Function AnalysisWave Direction MeasurementWave Spectrum MeasurementWind Wave Spectra
The RESSAC radar system, used from aircraft platforms for measuring directional spectra of ocean waves in the gravity domain (wavelengths from 30 to 400 m), is presented. The instrument consists of a C-band (5.35-GHz) FM/CW radar system. The transmitting and receiving antennas look toward the surface at a low incidence angle ( approximately=14 degrees for the center of the antenna beam) and rotate around a vertical axis. When the data are processed, the known antenna gain pattern is removed from the recorded signal, making it possible to estimate the sea surface slope variance, which in turn is used to determine the tilt modulation transfer function, without the need of any external wind measurement. Fully normalized spectra obtained from RESSAC are compared to other data sets.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Harunobu Masuko, Ken‐ichi Okamoto, Masanobu Shimada et al. · Journal of Geophysical Research Atmospheres · 1986 · 239 citations