基于多线程的FITS光谱快速处理的实现

The Implementation of Quick FITS Spectrum Processing based on Multi-threading

在天文学中,获取天体信息最基本的方式就是通过光谱分析。光谱现行的存储格式主要是FITS文件格式。观测得到的光谱数量巨大,占用大量的存储空间,需要快速的自动处理。在FITS文件的处理方面,现在所用的大部分软件都是处理单条FITS光谱文件,不适于进行快速批量的FITS文件的读取。本文详细介绍了FITS的结构,建立了基于对象的访问机制,通过运用多线程技术,对多个FITS文件进行并发读取处理。实验结果说明了这种机制的有效性。

In astronomy, the basic information of celestial bodies is usually obtained from their spectrums. The basic storage format of spectrum is FITS. The spectrums obtained from observations are great in number and take a huge storage space and need quick automatic processing. At present, most software for FITS file processing could only process a single FITS file at a time, and can not meet the requirements of quick FITS file processing. This paper explains the FITS file structure in detail, constructs the object oriented access mechanism and implements muhithreading technique to extract spectrums from FITS files concurrently. Experiments shows the efficiency of this processing mechnism.