| WANG Yunhua,LI Huimin,ZHANG Yanmin,GUO Lixin.The measurement of sea surface profile with X-band coherent marine radar[J].Acta Oceanologica Sinica,2015,34(9):65-70 |
| 基于相参X-波段海洋雷达的海表轮廓测量研究 |
| The measurement of sea surface profile with X-band coherent marine radar |
| 投稿时间：2014-08-20 修订日期：2015-01-05 |
| DOI：10.1007/s13131-015-0731-7 |
| 中文关键词: 相参X-波段海洋雷达 多普勒信号 海表轮廓 反演算法 |
| 英文关键词:X-band coherent marine radar Doppler signal sea surface profile retrieval method |
| 基金项目: |
|
| 摘要点击次数: 2426 |
| 全文下载次数: 1609 |
| 中文摘要: |
| X-波段海洋雷达测量所得海面散射单元的多普勒信息与散射单元的雷达视向速度密切相关。首先,基于符号多普勒估计方法,对X-波段雷达海面回波的多普勒频移信息进行了估计;在此基础上,应用各分辨单元回波的多普勒频移信息,建立了海浪表面轮廓的反演算法。该算法中,同时考虑了雷达入射角、方位角和雷达空间分辨率等因素对反演结果的影响。通过将反演结果与浮标测量数据相比较,发现雷达空间分辨率起到了类似低通滤波的作用,该作用对短重力波谱影响显著。同时,还应用加拿大麦克马斯特大学的IPIX雷达数据对海表轮廓进行了反演,并将反演所得有效波高、海浪周期与现场测量数据进行了比较,反演结果与现场测量结果吻合较好。 |
| 英文摘要: |
| The line-of-sight velocity of scattering facets is related to the Doppler signals of X-band coherent marine radar from the oceanic surface. First, the sign Doppler Estimator is applied to estimate the Doppler shift of each radar resolution cell. And then, in terms of the Doppler shift, a retrieval algorithm extracting the vertical displacement of the sea surface has been proposed. The effects induced by radar look-direction and radar spatial resolution are both taken into account in this retrieval algorithm. The comparison between the sea surface spectrum of buoy data and the retrieved spectrum reveals that the function of the radar spatial resolution is equivalent to a low pass filter, impacting especially the spectrum of short gravity waves. The experimental data collected by McMaster IPIX radar are also used to validate the performance of the retrieval algorithm. The derived significant wave height and wave period are compared with the in situ measurements, and the agreement indicates the practicality of the retrieval technology. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|