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An Efficient Calibration System of Optical Interferometer for Measuring Middle and Upper Atmospheric Wind
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An Efficient Calibration System of Optical Interferometer for Measuring Middle and Upper Atmospheric Wind
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An Efficient Calibration System of Optical Interferometer for Measuring Middle and Upper Atmospheric Wind
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Journal Article
An Efficient Calibration System of Optical Interferometer for Measuring Middle and Upper Atmospheric Wind
2023
Overview
Detection of the Doppler shift of airglow radiation in the middle and upper atmosphere is one of the most important methods for remote sensing of the atmospheric wind field. Laboratory and routine field calibration of an optical interferometer for wind measurement is very important. We report a novel calibration system that simulates a frequency shift of airglow emission lines introduced by wind in the middle and upper atmosphere for calibrating passive optical interferometers. The generator avoids the shortcomings of traditional motor-driven Doppler-shift generators in terms of stability and security while improving accuracy and simplifying assemblies. A simulated wind speed can be determined simultaneously using the light-beat method. The wind error simulated by the generator mainly comes from the light source, which is about 0.63 m/s. An experimental demonstration was conducted using a calibrated Fabry–Perot interferometer and showed that the root mean square of the measurement uncertainty is 0.91 m/s. The novel calibration system was applied to calibrate an asymmetric spatial heterodyne spectrometer (ASHS)-type interferometer successfully. The results demonstrate the feasibility of the system.
