Instrument forward model of the modified Sagnac interferometer for atmospheric wind measurement |
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| Authors: | Yuanhe Tang [Author Vitae] Lin Qin Ci Zhu |
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| Institution: | a School of Science, Xi'an University of Technology, No. 5 South Jinhua Road, Xi'an 710048, Chinab School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, No. 5 South Jinhua Road, Xi'an 710048, Chinac School of Science, Xi'an Jiaotong University, No. 28 Xian ning Road, Xi'an 710049, Chinad Physics Department, Univ. of New Brunswick, Fredericton, New Brunswick, Canada E3B5A3 |
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| Abstract: | The instrument forward model of the modified super-wide-Sagnac imaging interferometer based on liquid crystals on Silicon (MSASII-LCoS) is developed as an integrated code package with Matlab language to simulate the images of satellite observations. There are five sub-models in the forward model including radiation model of O(1S), orbit attitude, filter, interferometer and array detector. The principle of each sub-model is described separately and then the overall forward model equation is derived. The four simulation images are obtained. Based on the integrated signal level for the daytime observations, the apparent measurement error of wind is less than 3 m/s and the signal noise ratio (SNR) is greater than 194 with a binning of 2 × 25 pixels at the tangent height range of 70-190 km. |
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| Keywords: | Upper atmospheric wind field measurement Modified Sagnac imaging interferometer Instrument forward model |
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