基于太阳角度的全自动海洋光谱采集控制系统研究

针对海洋水色反演进行人工光谱采集时所存在的采集不连续、数据量少、覆盖海域面积小等问题,研究完成了一种基于太阳角度的全自动海洋光谱采集控制系统。该系统利用数据采集接收模块接收的位置、时间、角度信息进行太阳角度的精准计算,依据得到的太阳角度实时自动调整仪器观测平面的位置和光纤探头的指向角度,并根据光谱采集要求自动控制光纤探头转动,实现对天空光下行辐亮度、参考板上行辐亮度和海水上行辐亮度的采集,实现了海洋光谱采集的全自动控制。仿真分析了中国近海海域太阳方位角的变化情况,得到了中国近海海域太阳方位角的变化规律,保证了仪器观测平面位置调整的时效性和准确性。

Research on a Full-Automatic Ocean Spectra Collection and Control System Based on Solar Angles

Aiming to solve the problems of discontinuous collection,small amount of data and small coverage of sea area in the artificial spectra collection for the ocean color retrieval,a full-automatic ocean spectra collection and control system is completed and proposed based on solar angle.The system uses the position,time and angle information received by the data collection and receiving module to accurately calculate the solar angles.According to the obtained sun angle,the system automatically adjusts the position of the observation plane of the instrument and the pointing angle of the fiber optic probe in real time.Under the spectra collection requirements,the system automatically controls the rotation of the fiber optic probe to achieve the collection of downstream radiance of sky light,and upstream radiance of reference plate and seawater,it achieves the full-automatic control of the ocean spectra collection.The variation of solar azimuth in China's offshore waters were analyzed during the simulations.The variation law of the solar azimuth in the offshore waters of China which obtained by the simulation ensures the timeliness and accuracy of the adjustment of the instrument's observation plane position.