• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Sensors, systems, and next-generation satellites XX >A comparison between data processing techniques for FTS based on high frequency interferogram sampling
【24h】

A comparison between data processing techniques for FTS based on high frequency interferogram sampling

机译：基于高频干涉图采样的FTS数据处理技术之间的比较

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper compares different data processing techniques for FTS with the aim of assessing the feasibility of a spectrometer leveraging on standard DAC boards, without dedicated hardware for sampling and speed control of the moving mirrors. Fourier transform spectrometers rely on the sampling of the interferogram at constant steps of the optical path difference (OPD) to evaluate the spectra through standard discrete Fourier transform. Constant OPD sampling is traditionally achieved with dedicated hardware but, recently, sampling methods based on the use of common analog to digital converters with large dynamic range and high sampling frequency have become viable when associated with specific data processing techniques. These methods offer advantages from the point of view of insensitivity to disturbances, in particular mechanical vibrations, and should be less sensitive to OPD speed errors. In this work the performances of three algorithms, two taken from literature based on phase demodulation of a reference interferogram have been compared with a method based on direct phase computation of the reference interferogram in terms of robustness against mechanical vibrations and OPD speed errors. All methods provided almost correct spectra with vibrations amplitudes up to 10％ of the average OPD speed and speed drifts within the scan up to 20％ of the average, as long as the disturbance frequency was lower than the reference signal nominal one. The developed method based on the arccosine function keeps working also with frequencies of the disturbances larger than the reference channel one, the common limit for the other two.
机译：本文比较了用于FTS的不同数据处理技术，目的是评估利用标准DAC板的光谱仪的可行性，而无需专用的硬件来进行移动镜的采样和速度控制。傅立叶变换光谱仪依靠在光程差（OPD）恒定步长处的干涉图采样来通过标准离散傅立叶变换评估光谱。传统上，恒定OPD采样是通过专用硬件实现的，但是最近，当与特定的数据处理技术相关联时，基于使用具有大动态范围和高采样频率的通用模数转换器的采样方法已变得可行。从对扰动不敏感，特别是对机械振动的角度来看，这些方法具有优势，并且应该对OPD速度误差不那么敏感。在这项工作中，在抵抗机械振动和OPD速度误差的鲁棒性方面，将三种算法的性能与基于参考干涉图的直接相位计算的方法进行了比较，这三种算法是从基于参考干涉图的相位解调的文献中获得的。只要干扰频率低于参考信号标称值之一，所有方法都可以提供几乎正确的频谱，其振动幅度高达平均OPD速度的10％，并且扫描内的速度漂移高达平均值的20％。基于反余弦函数的已开发方法还可以在干扰频率大于参考通道之一（其他两个通道的公共极限）的情况下继续工作。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号