Subjects: Geosciences >> Space Physics submitted time 2017-01-22
Abstract： As the thin air in the upper atmosphere(~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. To date, FPI has been used for wind measurements from both space and ground for decades. Many countries observed OI 630.0 nm nightglow emission to retrieve wind velocities by use of kinds of FPIs. In this paper, a tiny ground-based Fabry-Perot Interferometer (FPI) is designed 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�.58�.35 m3, which demonstrates that the FPI is convenient to be transported from one place to another. Based on the instrument, several days of experiments were carried out at Langfang (39.40癗, 116.65癊) site and Kelan (38.71�N, 111.58�E) site for a detailed validation. The averaged wind deviation at Kelan sites between our FPI and American A-NCAR FPI is 11.8 m/s, which suggests good agreement between them.
Peer Review Status:
Awaiting Review
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