物理学报2017，Vol.66Issue(13)：73-83,11.DOI:10.7498/aps.66.130601
地基气辉成像干涉仪探测高层大气风场的定标研究
Calibrations of ground based airglow imaging interferometer for the upper atmospheric wind field measurement
摘要
Abstract
Ground based airglow imaging interferometer (GBAII) prototype made by our group is used to successfully detect the atmospheric wind velocity and temperature at the altituded of 90–100 km. In order to improve GBAII's velocity accuracy, its calibrations are studied in this paper where covered are the calibration of imaging interference fringe center position, CCD dark noise and flat field, the decay coefficient of GBAII's optical system, the phase step length, GBAII's optical path difference with the angle of incidence, GBAII instrument response and the zero wind speed phase calibration, etc. The theoretical and experimental researches of calibration show the following conclusions. The fringe center coordinates by shooting 30 imaging interference fringes are confirmed on the pixel of CCD (123.3, 121.1) by using the least squares method; by 632.8 nm laser for the CCD flat field calibration, the parameters of CCD's flat field coefficients, dark intensity, dead pixels and the imaging interference fringes before and after flat field are all obtained, respectively; the comparison between GBAII's one edge fringe bright whose incidence angle of 10.24? and the center fringe bright whose incidence angle of 0? shows that the edge fringe phase is stepped by 0.356 fringes relative to the center fringe. After taking the sample of 200 imaging interference fringes, from the sine fit curve of the phase step interval at an incident angle of 10.24?, the fitted root mean square (RMS) deviation is obtained to be 90.34% and the step interval of 4.06 nm for one interference fringes is corresponding to the stepped phase of 0.0094π; According to the forward formula, GBAII's system decay coefficient calibration is performed after taking imaging interference fringes by IDL programming, the RMS deviation of fitted curve is 99.98%;GBAII's response is 4.97 × 10?3 counts (Rayleigh·s)?1 from the 632.8 nm laser experiment; GBAII's zero wind speed calibration phases are obtained to be ?9.2442? and?68.6353? for the 532.0 nm and 632.8 nm lasers for the outdoor experiment, respectively. This paper provides a series of calibration methods for GBAII and these methods are all verifies experimentally. These calibration methods can support the upper atmospheric wind field passive measurement.关键词
定标/高层大气风场/相位Key words
calibration/upper atmospheric wind field/phase引用本文复制引用
唐远河,崔进,郜海阳,屈欧阳,段晓东,李存霞,刘丽娜..地基气辉成像干涉仪探测高层大气风场的定标研究[J].物理学报,2017,66(13):73-83,11.基金项目
国家自然科学基金(批准号: 61675165)、陕西自然科学基金(批准号: 2016JM1011)和西安理工大学特色项目(批准号:2015TS012)资助的课题. Project supported by the National Natural Science Foundation of China (Grant No. 61675165), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2016JM1011), and the Characteristic Fund of Xi'an University of Technology, China (Grant No. 2015TS012). （批准号: 61675165）
