發(fā)布時間：2018-07-08 18:15

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

【摘要】：衛(wèi)星雷達高度計已經(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)成功運用在海洋防災減災、海洋資源開發(fā)和全球變化研究等諸多領域，并發(fā)揮了重要的作用。隨著高度計數(shù)據(jù)應用研究的深入和研究領域的拓展，對觀測數(shù)據(jù)的定量化應用提出了更高的要求。其嚴格精準的定標是高度計廣泛應用的前提，它直接影響著衛(wèi)星產(chǎn)品數(shù)據(jù)的精度和質量。我國HY-2衛(wèi)星雷達高度計自2011年8月發(fā)射至今已有兩年多時間，通過在軌測試表明：高度計各項技術指標基本滿足應用需求。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）的絕對定標工作以及數(shù)據(jù)產(chǎn)品質量的評估尚未形成高精確、可靠、標準的處理流程，極大制約了高度計數(shù)據(jù)產(chǎn)品的定量化應用。為此，本論文圍繞HY-2衛(wèi)星高度計海面高度定標技術開展應用研究，旨在突破測高誤差修正、交叉點定標和基于現(xiàn)場觀測絕對定標中的關鍵技術。本文研究成果經(jīng)進一步檢驗和評估后將納入HY-2衛(wèi)星高度計定標和檢驗分系統(tǒng)的業(yè)務處理中，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)處理和定標及檢驗的業(yè)務化運行提供了技術支撐。 高度計海面高度絕對定標是一項涉及多個領域知識的、復雜的數(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鍵角色來開展本研究工作，對高度計測高原理和主要關鍵技術展開深入探討，然后針對HY-2衛(wèi)星高度計海面高度定標有關的環(huán)節(jié)進行了深入研究，其主要研究內容包括定標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、現(xiàn)場定標和對專用定標場建設的研究等方面，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中所涉及的主要誤差源進行了研究和分析，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果準確可靠，并可用于高度計定標和檢驗。 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Jason-2的交叉定標結果，其平均相對偏差為0.26cm，均方根誤差為6.61cm，交叉定標精度達到國際同類高度計精度水平。 3）基于現(xiàn)場觀測數(shù)據(jù)的絕對定標能給出絕對意義上的高度計海面高度定標參數(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方法，海上試驗表明此方法精度達到1.88±0.20cm，，由此可知此方法滿足業(yè)務化高度計定標檢驗。 4）本文對海上定標場的建設進行了多個方面的研究和分析，給出了我國在定標場建設中的選址原則、觀測儀器配置和場區(qū)選址等方面的建議，它是開展絕對定標技術的關鍵，為我國建設HY-2定標場提供了技術支撐，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
【學位授予單位】：中國海洋大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：P715.6

【參考文獻】

相關期刊論文 前10條

1 董曉軍,黃s

本文編號：2108289