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Chinese Journal of Space Science ›› 2016, Vol. 36 ›› Issue (3): 352-357.doi: 10.11728/cjss2016.03.352

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A New Ground-based Fabry-Perot Interferometer for Measurement of the Thermospheric Wind

WANG Houmao, WANG Yongmei, FU Jianguo, ZHANG Zhongmou   

  1. National Space Science Center, Chinese Academy of Sciences, Beijing 100190
  • Received:2015-05-12 Revised:2015-12-14 Online:2016-05-15 Published:2016-06-06

Abstract:

As the thin air in the upper atmosphere (about 250 km),passive optical measurement is considered as the most efficient method for wind retrieval of the upper atmosphere.Because of high energy utilization and high spectral resolution,Fabry-Perot Interferometer (FPI) is one of the most widely used instruments for wind measurements.In this paper,a tiny ground-based FPI is designed by using a band-pass filter behind etalon and Galilean telescope system for wind observation of the upper atmosphere.The instrument is mainly composed of five parts including front optics sky-scanner,the etalon,Galilean telescope and filter,detector,and laser calibration system.The size of the instrument is 1.34 m×0.58 m×0.35 m,and the FPI is convenient to be transported from one place to another.Based on the instrument,several days of experiments are carried out at Langfang (39.40°N,116.65°E) station and Kelan (38.71°N,111.58°E) station for a detailed validation.The averaged wind deviation at Kelan sites between our FPI and American A-NCAR FPI is 11.8 m·s-1 when airglow is weak,which suggests good agreement between them.

Key words: Fabry-Perot Interferometer (FPI), Thermospheric wind, Ground-based observation, 630.0 nm nightglow

CLC Number: