Wind retrieval of Fabry-Perot interferometer in the middle and upper atmosphere using wavelength depth method based on satellite-based simulation and ground-based measurement

Abstract

The satellite-based observations of the Fabry-Perot Interferometer interference ring in the middle and upper atmosphere (80–300 km) are simulated, which include the 557.7 nm, 630.0 nm, and O2 (0–0) airglows. Based on the simulation, the central wavelength of the airglow is determined to calculate the wind. First, based on the relationship model between the wavelength and peak position of the interferometer fringe, the peak position is adjusted by changing the wavelength until it is equal to the measured peak position. Then, the nominal wind is calculated by combining the obtained wavelength with the assumed wavelength of zero wind speed. Finally, the final wind is obtained by the zero reference correction. To validate the method, the scheme is used for wind retrieval, and the results are compared with the actual winds, which are the input parameters in the simulation. The average errors of the 557.7 nm and 630.0 nm dayglow are 3.18 m/s and 3.29 m/s, respectively. The average errors of the nightglow are slightly larger at 3.79 m/s (557.7 nm) and 9.08 m/s (630.0 nm), owing to their weak radiation. The average error of O2 (0–0) is 1.41 m/s, while it is 5.88 m/s using the traditional method. These results show that this method is applicable to wind retrieval.

Keywords

• fabry-perot interferometer
• wind retrieval
• airglow
• satellite-based simulation
• ground-based measurement
• wavelength depth method