發(fā)布時間：2018-01-14 02:04

  本文關鍵詞：溫室氣體監(jiān)測儀全過程定標軟件開發(fā)與實現(xiàn)　出處：《中國科學技術大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 溫室氣體監(jiān)測儀 定標軟件 在軌光譜定標不確定度

【摘要】：溫室氣體監(jiān)測儀采用空間外差干涉技術,能有效探測759nm～2058nm波段大氣高分辨率吸收光譜信息,用于反演大尺度范圍上的大氣主要溫室氣體濃度含量數(shù)據(jù),達到監(jiān)測全球范圍內溫室氣體含量變化的目的。定量化反演的前提是要有高精度觀測光譜數(shù)據(jù),定標化反演的本質就是通過迭代計算實測譜與模擬譜之間差異的最小化。因此,觀測光譜數(shù)據(jù)的誤差將會大大降低反演精度,定標就是為了修正這種儀器測量誤差,從載荷發(fā)射前到在軌運行整個壽命周期內全過程定標貫穿始終。按照溫室氣體監(jiān)測儀定標階段劃分,全過程定標可分為實驗室定標和在軌星上定標。實驗室定標是在實驗室條件下模擬溫室氣體監(jiān)測儀在軌運行環(huán)境,對儀器的性能進行全面的檢測和標定,定標精度最高,為溫室氣體監(jiān)測儀在軌工作及溫室氣體反演提供了重要參數(shù),也為星上定標提供了初始參考。但由于在軌運行環(huán)境條件狀態(tài)與實驗室有差異,使得實驗定標系數(shù)應用于在軌條件會引入誤差,為了長期地監(jiān)測載荷響應的衰減,及時修正儀器各項性能參數(shù),還需開展在軌星上定標工作。溫室氣體監(jiān)測儀定標軟件就是為了滿足溫室氣體監(jiān)測儀定標業(yè)務需要所設計的復雜系統(tǒng),它包括了數(shù)據(jù)預處理、實驗室光譜定標、實驗室輻射定標、在軌光譜定標和在軌輻射定標。論文利用軟件工程的設計思想對軟件系統(tǒng)的開發(fā)和實現(xiàn)進行了相關研究。首先,依據(jù)定標需求,分析了溫室氣體監(jiān)測儀定標軟件的功能需求、性能需求以及接口需求,并設計了軟件總體業(yè)務流程。其次,根據(jù)模塊化、分層化的設計思想,對系統(tǒng)進行了模塊劃分;采用面向對象、自頂而下的設計方法,設計了軟件架構和界面主框架;再根據(jù)現(xiàn)有定標相關算法,詳細設計了每個模塊的功能和人機交互界面。最后,按照軟件詳細設計,實現(xiàn)了軟件開發(fā),并利用實測數(shù)據(jù)和模擬數(shù)據(jù)對軟件的各個模塊進行了測試,測試結果表明溫室氣體監(jiān)測儀定標軟件可滿足定標任務常態(tài)化、業(yè)務化的應用需求。論文還研究了在軌光譜定標不確定度影響因素,得出在軌光譜定標主要受定標光源不確定度影響的結論,為后續(xù)溫室氣體監(jiān)測儀在軌光譜定標算法的改進提供了參考。
[Abstract]:Using spatial heterodyne interferometry, the greenhouse gas monitor can effectively detect the high resolution absorption spectrum information of the atmosphere at the wavelength of 759 nm ~ (m) ~ (-1) ~ 2058 nm. It can be used to retrieve the concentration data of the main greenhouse gases in the large scale to monitor the change of the greenhouse gas content in the global scope. The premise of quantitative inversion is to have high precision observation spectral data. The essence of calibrated inversion is to minimize the difference between measured and simulated spectra through iterative calculation. Therefore, the error of observed spectral data will greatly reduce the inversion accuracy. Calibration is to correct the measuring error of this instrument, the whole process of calibration runs throughout the whole life cycle from the launch of the load to the on-orbit operation, and is divided according to the calibration stage of the greenhouse gas monitor. The whole process of calibration can be divided into laboratory calibration and on-orbit calibration. The laboratory calibration is to simulate the operating environment of greenhouse gas monitor in orbit under the laboratory conditions, and to comprehensively test and calibrate the performance of the instrument. The calibration accuracy is the highest, which provides important parameters for the on-orbit operation of the greenhouse gas monitor and greenhouse gas inversion, as well as the initial reference for the on-board calibration. In order to monitor the attenuation of load response for a long time, the performance parameters of the instrument can be corrected in time. The calibration software of greenhouse gas monitor is a complex system designed to meet the requirement of calibration of greenhouse gas monitor, which includes data preprocessing and spectrum calibration in laboratory. Laboratory radiation calibration, on-orbit spectral calibration and in-orbit radiation calibration. This paper uses the design idea of software engineering to study the development and implementation of the software system. First, according to the calibration requirements. The functional requirements, performance requirements and interface requirements of the calibration software for the greenhouse gas monitor are analyzed, and the overall business process of the software is designed. Secondly, according to the modular, hierarchical design idea. The system is divided into modules. The software architecture and interface main frame are designed by using the object-oriented and top-down design method. According to the existing calibration algorithms, the function of each module and man-machine interface are designed in detail. Finally, according to the detailed design of the software, the software development is realized. The software modules are tested with the measured data and simulation data. The test results show that the calibration software of greenhouse gas monitor can meet the normalization of the calibration task. The paper also studies the influence factors of on-orbit spectral calibration uncertainty, and draws the conclusion that the in-orbit spectral calibration is mainly affected by calibration light source uncertainty. It provides a reference for the improvement of the spectral calibration algorithm of the greenhouse gas monitor in orbit.
【學位授予單位】：中國科學技術大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP216;TP311.52

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