發(fā)布時(shí)間：2018-05-19 01:19

  本文選題：海洋波譜儀 + 斜率概率密度函數(shù)��； 參考：《華中科技大學(xué)》2016年碩士論文

【摘要】：氣象、航海、造船、海洋工程等領(lǐng)域,都需要高精度的實(shí)時(shí)海浪信息。海浪方向譜是重要的海浪信息,某時(shí)某地海洋波浪場(chǎng)的統(tǒng)計(jì)特征(波高,波長(zhǎng),波周期,波向,波陡等)均可由海浪方向譜計(jì)算得到,因此海浪方向譜的獲取極為重要。海浪波譜儀是專(zhuān)門(mén)為海浪方向譜探測(cè)而設(shè)計(jì)的新型微波傳感器,是一種小入射角360°方位向旋轉(zhuǎn)掃描的真實(shí)孔徑雷達(dá)。2018年世界上第一臺(tái)星載波譜儀SWIM(Surface Wave Investigation and Monitoring)將隨中法海洋星發(fā)射升空。本文研究了利用機(jī)載波譜儀實(shí)測(cè)數(shù)據(jù)進(jìn)行海浪方向譜反演。針對(duì)機(jī)載情況下入射角范圍較大的問(wèn)題,首先討論了調(diào)制信號(hào)的提取方法;然后,鑒于斑點(diǎn)噪聲對(duì)海浪譜反演性能的重要影響,重點(diǎn)研究了波譜儀海面斑點(diǎn)噪聲的形成機(jī)理、統(tǒng)計(jì)特性和去除方法;從波譜儀實(shí)測(cè)數(shù)據(jù)中反演出海浪方向譜,并將反演結(jié)果與浮標(biāo)數(shù)據(jù)進(jìn)行了對(duì)比驗(yàn)證。本文的另一個(gè)主要研究?jī)?nèi)容是利用波譜儀數(shù)據(jù)實(shí)現(xiàn)海浪斜率反演。海浪斜率是海/氣界面基本的物理參數(shù),但目前還缺乏大范圍的直接測(cè)量手段。波譜儀特有的工作方式,能夠獲取小入射角下海面隨入射角和方位角變化的二維散射數(shù)據(jù),使得海浪斜率的遙感成為可能。本文基于準(zhǔn)鏡像散射近似模型建立了波譜儀海浪斜率反演模型,并通過(guò)與小入射角海面精確散射模型——物理光學(xué)模型的仿真計(jì)算結(jié)果對(duì)比,確定了斜率反演模型的入射角適用范圍。通過(guò)非線(xiàn)性最小二乘二維反演方法,從機(jī)載波譜儀二維散射數(shù)據(jù)中提取出準(zhǔn)高斯海浪斜率中全部參數(shù),實(shí)現(xiàn)了波譜儀海浪二維斜率遙感。
[Abstract]:In the fields of meteorology, navigation, shipbuilding, ocean engineering and so on, high-precision real-time wave information is needed. Wave directional spectrum is an important wave information. The statistical characteristics of ocean wave field (wave height, wavelength, wave period, wave direction, wave steepness, etc.) can be obtained from the wave direction spectrum, so it is very important to obtain the wave direction spectrum. Wave spectrometer is a new type of microwave sensor specially designed for wave directional spectrum detection. It is a real aperture radar with a small incident angle of 360 擄azimuth rotation scanning. The world's first satellite carrier spectrometer (SWIM(Surface Wave Investigation and Monitoring) will be launched into orbit with the Chinese and French ocean stars in 2018. In this paper, the inversion of wave directional spectrum by using the measured data of the machine carrier spectrometer is studied. Aiming at the problem of large range of incident angle in airborne case, this paper first discusses the method of extracting modulated signal, and then, in view of the important influence of speckle noise on the inversion performance of wave spectrum, the formation mechanism of speckle noise on the sea surface of the spectrometer is studied emphatically. The statistical characteristics and removal methods, the inversion of the wave directional spectrum from the measured data of the wave spectrometer, and the comparison between the inversion results and the buoy data are carried out. Another main research content of this paper is to use wave spectrometer data to realize wave slope inversion. Wave slope is the basic physical parameter of the sea / air interface, but there is still a lack of direct measurement in a wide range. The special mode of operation of the wave spectrometer can obtain the two-dimensional scattering data of the sea surface changing with the incident angle and azimuth under the small incidence angle, which makes the remote sensing of the wave slope possible. Based on the quasi-mirror scattering approximation model, the wave slope inversion model of the wave spectrometer is established in this paper, and the simulation results of the wave slope inversion model are compared with those of the small-angle sea surface exact scattering model-physical optics model. The applicable range of incident angle of slope inversion model is determined. By means of nonlinear least square two-dimensional inversion method, all parameters of quasi Gao Si wave slope are extracted from the two-dimensional scattering data of the machine carrier spectrometer, and the remote sensing of the wave slope is realized.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：P716.22;P731.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 胡瓊;王慧;樓亞妮;;海洋經(jīng)濟(jì)對(duì)浙江大學(xué)生就業(yè)創(chuàng)業(yè)的影響研究[J];科學(xué)咨詢(xún)(科技·管理);2014年04期

2 王芳;;淺析加強(qiáng)海洋環(huán)境文化建設(shè)必要性[J];海洋技術(shù);2009年01期

相關(guān)會(huì)議論文 前1條

1 侯建軍;蔡烽;石愛(ài)國(guó);;航海技術(shù)中的海浪研究[A];2002航海實(shí)用新技術(shù)論文集[C];2002年

相關(guān)博士學(xué)位論文 前2條

1 馮有良;海洋災(zāi)害影響我國(guó)近海海洋資源開(kāi)發(fā)的測(cè)度與管理研究[D];中國(guó)海洋大學(xué);2013年

2 儲(chǔ)小青;海浪波譜儀海浪遙感方法及應(yīng)用基礎(chǔ)研究[D];中國(guó)科學(xué)院研究生院（海洋研究所）;2011年

相關(guān)碩士學(xué)位論文 前1條

1 宋莎莎;機(jī)載波譜儀海浪譜反演方法研究[D];國(guó)家海洋局第一海洋研究所;2011年

，

本文編號(hào)：1908072