本文選題：HY-2衛(wèi)星 + 雷達(dá)高度計　； 參考：《中國海洋大學(xué)》2014年博士論文

【摘要】：衛(wèi)星雷達(dá)高度計已經(jīng)成為了研究海洋和氣候變化的有力工具（以下簡稱高度計），它以前所未有的精度提供了大量寶貴的全球海洋動力環(huán)境觀測數(shù)據(jù)，已經(jīng)成功運(yùn)用在海洋防災(zāi)減災(zāi)、海洋資源開發(fā)和全球變化研究等諸多領(lǐng)域，并發(fā)揮了重要的作用。隨著高度計數(shù)據(jù)應(yīng)用研究的深入和研究領(lǐng)域的拓展，對觀測數(shù)據(jù)的定量化應(yīng)用提出了更高的要求。其嚴(yán)格精準(zhǔn)的定標(biāo)是高度計廣泛應(yīng)用的前提，它直接影響著衛(wèi)星產(chǎn)品數(shù)據(jù)的精度和質(zhì)量。我國HY-2衛(wèi)星雷達(dá)高度計自2011年8月發(fā)射至今已有兩年多時間，通過在軌測試表明：高度計各項技術(shù)指標(biāo)基本滿足應(yīng)用需求。但對于高度計獲取的重要海洋動力環(huán)境參數(shù)（海面高度）的絕對定標(biāo)工作以及數(shù)據(jù)產(chǎn)品質(zhì)量的評估尚未形成高精確、可靠、標(biāo)準(zhǔn)的處理流程，極大制約了高度計數(shù)據(jù)產(chǎn)品的定量化應(yīng)用。為此，本論文圍繞HY-2衛(wèi)星高度計海面高度定標(biāo)技術(shù)開展應(yīng)用研究，旨在突破測高誤差修正、交叉點定標(biāo)和基于現(xiàn)場觀測絕對定標(biāo)中的關(guān)鍵技術(shù)。本文研究成果經(jīng)進(jìn)一步檢驗和評估后將納入HY-2衛(wèi)星高度計定標(biāo)和檢驗分系統(tǒng)的業(yè)務(wù)處理中，可為HY-2衛(wèi)星地面數(shù)據(jù)處理系統(tǒng)中高度計數(shù)據(jù)處理和定標(biāo)及檢驗的業(yè)務(wù)化運(yùn)行提供了技術(shù)支撐。 高度計海面高度絕對定標(biāo)是一項涉及多個領(lǐng)域知識的、復(fù)雜的數(shù)據(jù)處理過程。論文首先以全球變化背景下的海洋觀測中高度計所扮演的關(guān)鍵角色來開展本研究工作，對高度計測高原理和主要關(guān)鍵技術(shù)展開深入探討，然后針對HY-2衛(wèi)星高度計海面高度定標(biāo)有關(guān)的環(huán)節(jié)進(jìn)行了深入研究，其主要研究內(nèi)容包括定標(biāo)過程中所涉及的海況、大氣、地球物理環(huán)境因素等各項誤差源的修正、交叉定標(biāo)、現(xiàn)場定標(biāo)和對專用定標(biāo)場建設(shè)的研究等方面，具體研究工作及創(chuàng)新點如下： 1）誤差源對高度計觀測的精度有重要影響，論文對高度計海面高度定標(biāo)中所涉及的主要誤差源進(jìn)行了研究和分析，基于國外同類衛(wèi)星高度計Jason-2數(shù)據(jù)的修正項和獨立模型/算法的結(jié)果一致性較好，兩者的均方根誤差為2.97cm，表明獨立模型和算法的誤差修正結(jié)果準(zhǔn)確可靠，并可用于高度計定標(biāo)和檢驗。 2）基于獨立模型/算法，研究得出了HY-2衛(wèi)星高度計海面高度（SSH）相對于參考任務(wù)Jason-2的交叉定標(biāo)結(jié)果，其平均相對偏差為0.26cm，均方根誤差為6.61cm，交叉定標(biāo)精度達(dá)到國際同類高度計精度水平。 3）基于現(xiàn)場觀測數(shù)據(jù)的絕對定標(biāo)能給出絕對意義上的高度計海面高度定標(biāo)參數(shù)，提出了一種切實可行的基于岸基驗潮儀水位外推的高度計絕對定標(biāo)方法，海上試驗表明此方法精度達(dá)到1.88±0.20cm，，由此可知此方法滿足業(yè)務(wù)化高度計定標(biāo)檢驗。 4）本文對海上定標(biāo)場的建設(shè)進(jìn)行了多個方面的研究和分析，給出了我國在定標(biāo)場建設(shè)中的選址原則、觀測儀器配置和場區(qū)選址等方面的建議，它是開展絕對定標(biāo)技術(shù)的關(guān)鍵，為我國建設(shè)HY-2定標(biāo)場提供了技術(shù)支撐，意義重大
[Abstract]:Satellite radar altimeter has become a powerful tool for researching ocean and climate change ( hereinafter referred to as altimeter ) . It has provided a lot of valuable global marine dynamic environment observation data with unprecedented precision . It has been successfully applied in the field of ocean disaster prevention and mitigation , marine resources development and global change research .

The altitude absolute calibration of altimeter is a complex data processing process involving knowledge in many fields . First , this research work is carried out with the key role played by the altimeter in the background of global change . The main research contents include the correction of various error sources such as sea condition , atmosphere , geophysical environment factor , etc . in the process of calibration . The main research contents include the following aspects : sea condition , atmosphere , geophysical environment factor , etc . , and the research work and innovation points are as follows :

1 ) The error source has an important influence on the accuracy of altimeter observation . The paper studies and analyzes the main error sources involved in the height calibration of altimeter sea level . The results of the modified term and the independent model / algorithm based on the data from the same satellite altimeter are 2.97cm , indicating that the error correction results of the independent model and algorithm are accurate and reliable , and can be used for the calibration and inspection of altimeter .

2 ) Based on the independent model / algorithm , the cross - scaling results of HY - 2 satellite altimeter sea level ( SSH ) with respect to the reference task Jason - 2 are obtained . The average relative deviation is 0.26 cm , the root mean square error is 6.61cm , and the precision of the cross calibration reaches the precision level of the internationally similar altimeter .

3 ) Based on the absolute calibration of the field observation data , an absolute calibration method of altimeter sea level in absolute sense is given , and a feasible absolute calibration method based on shore - based tide gauge water level extrapolation is proposed . The sea test shows that the accuracy of this method is 1 . 88 鹵 0 . 20 cm . Therefore , it can be seen that this method meets the calibration test of business altimeter .

4 ) In this paper , the research and analysis of the construction of the calibration field at sea are carried out , and the selection principle , the configuration of the observation instrument and the site selection of the site are given . It is the key to carry out the absolute calibration technique . It provides the technical support for the construction of HY - 2 calibration field in China . It is of great significance
【學(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：P715.6

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 董曉軍,黃s

本文編號：2108289