Development And Implementation Of Whole Process Calibration Software For The Greenhousegases Monitoring Instrument

The Greenhousegases Monitoring Instrument using spatial heterodyne interferometry,can effectively detect 759nm-2058nm band high resolution atmospheric absorption spectrum information,for the concentration of atmospheric the greenhouse gases on the large scale data inversion,to change the content of the greenhouse gases worldwide monitoring purposes.The precondition of quantitative inversion is to have high precision observation of spectral data,and the essence of calibration inversion is to minimize the difference between measured and simulated spectra by iterative computation.Therefore,the error will be observed spectral data greatly reduces the retrieval accuracy,calibration is to measure the error correction of such instruments from the load before the launch to orbit within the whole life cycle of the whole process of calibration throughout.In accordance with the calibration stage of the greenhousegases monitoring instrument,the whole process calibration can be divided into laboratory calibration and on-board calibration.Laboratory calibration is under the condition of laboratory simulation of the greenhousegases monitoring instrument on orbit environment,to conduct a comprehensive inspection and calibration of the instrument performance,the calibration accuracy is highest,which provides important parameters for the greenhousegases monitoring instrument on the greenhouse gases and also provides a standard inversion,the initial reference for on orbit.But because the orbit condition and laboratory environment are different,the experimental scaling factor applied to orbit error conditions,in order to monitor the long term load attenuation response,the performance of the instrument parameters timely correction,also need to carry out on-board radiometric calibration work.The greenhousegases monitor instrument calibration software is to meet the the greenhousegases monitoring instrument system calibration complex business needs design,which includes data preprocessing,spectral calibration,laboratory radiometric calibration and on orbit spectral calibration and on orbit radiometric calibration.The thesis studies the development and implementation of software system by using the idea of software engineering.First of all,according to the calibration requirements,the functional requirements,performance requirements and interface requirements of the calibration software for the greenhousegases monitoring instrument are analyzed,and the overall business process of the sofftware is designed.Secondly,according to the design idea of modularization and hierarchical,divide the system into modules;using object-oriented design method,top-down design,software architecture and interface of main frame;then according to the existing calibration algorithm,the detailed design of each module and man-machine interface.Finally,according to the software detailed design,realization of software development,and using the measured data and simulation data of software modules were tested.The test results show that the the greenhousegases monitoring instrument calibration software can meet the calibration requirement of the task.The paper also studies the on orbit spectral calibration uncertainty factors,the on orbit spectral calibration source is mainly affected by the influence of uncertainty of results,provide a reference for the subsequent improvement of calibration on orbit spectral radiometric of the greenhousegases monitoring instrument.