海洋气象学报2024，Vol.44Issue(4)：30-37,8.DOI:10.19513/j.cnki.hyqxxb.20240512001
CFOSAT SWIM波谱仪中法产品差异性分析
Analysis on differences in CFOSAT SWIM products between Chinese and French sides
摘要
Abstract
The China-France Oceanography SATellite(CFOSAT)carries the world's first radar dedicated to the detection of two-dimensional wave spectrum,namely the SWIM(Surface Waves Investigation and Monitoring)spectrometer.The radar can scan the ocean surface by rotating 6 different beams to obtain two-dimensional wave spectrum information and set the resolution of the two-dimensional spectrum along the orbit by controlling the rotation speed of the antenna.China and France release L2 spectrometer products with the same software processing,but because the locations of the receiving stations in China and France are different and the input of meteorological auxiliary data sources during ground data processing are not completely consistent,there are certain differences in the L2 products released by both sides,which brings certain uncertainties to the application of spectrometer products.To clarify the differences between spectrometer products of the same version obtained from different data download sources,the latest version of L2 data released by relevant Chinese and French units in March 2024 is selected.The time-matching windows of 5.0 s,3.0 s,1.0 s and 0.1 s are adopted to obtain the consistency comparison results of the three main wave parameters of the two-dimensional wave spectrum under different matching times.The results show that the significant wave height is relatively stable,and the accuracy remains almost constant under the spatial difference of the maximum half box.With the increase of matching time,the differences of peak wave length and wave direction become larger and larger.When the matching time is 5.0 s,their difference is about 21.5 m and 46.5°,respectively,while the difference is very small when the matching time is 0.1 s,that is,the product difference caused by the difference of meteorological auxiliary data sources input from different ground processing systems in China and France can be ignored.关键词
中法海洋卫星(CFOSAT)/SWIM波谱仪/有效波高/主波波长/主波波向/微波遥感Key words
China-France Oceanography SATellite(CFOSAT)/SWIM(Surface Waves Investigation and Monitoring)spectrometer/significant wave height/peak wave length/peak wave direction/microwave remote sensing分类
海洋科学引用本文复制引用
徐莹,李秀仲,顾经纬,孙从容,郭茂华,曹雯炯..CFOSAT SWIM波谱仪中法产品差异性分析[J].海洋气象学报,2024,44(4):30-37,8.基金项目
国家自然科学基金项目(42176184,41706202) （42176184,41706202）
