The Short Wave Observation Using the Optical Instrument for Detecting Microstructure of Sea Surface Wave

摘要

The marine microwave remote sensing is based on the interaction between the EM wave and the small-scale wave with a wavelength comparable to that of the EM wave, so the most important in-situ work must be done to measure the structure of small-=scale wave. The optical instrument for detecting microstructure of sea surface wave is used to obtain the pattern of fine scale wave, and a series of algorithm is developed to calculate the high frequency wave spectrum from the image data. The color-encoding method is used to measure the 2-D structure of water surface. The apparature consists of 4 parts: the light source, a color-encoding plate, the Fresnel Lens, and 3CCD camera. The color-encoding plate is designed on the basis of the HSI Encoding method. The actual image size measured by the instrument is about 0.4 * 0.3 m. The image's sampling rate is 20 Hz; the spatial resolution is 1 mm with a dynamic slope range of ± 45°. The system was successfully deployed in the water tank. The image processing is discussed to introduce how to get the wave number spectrum can be got from the original color slope image. The algorithm will processing is discussed to introduce how to get the wave number spectrum can be got from the original color slope image. The algorithm will provide a good opportunity for us to solve some problems in marine remote-sensing mechanism and oceanic dynamics.