Chirp信号在天文观测中的应用  

Application of Chirp Signal in Astronomical Observation

作　　者：范江涛[1] 马冠一[1] 万庆涛[1] 张杰[1] 

机构地区：[1]中国科学院国家天文台,北京100012

出　　处：《天文研究与技术》2017年第4期443-451,共9页Astronomical Research & Technology

基　　金：国家自然科学基金(11403045;11473045;11503040)资助

摘　　要：Chirp信号是一种频率随时间有规律连续变化的信号,由于其优良的自相关特性,在实时宽带高精度频谱测量中有重要应用。通过对Chirp信号的分析,介绍了基于线性Chirp信号的脉冲压缩技术及Chirp变换频谱仪的原理,综述了近30年来Chirp变换频谱仪在行星和彗星大气红外谱测量中的应用及其发展历程。结合当前电子技术的发展,指出了改善Chirp变换频谱仪性能的研究方向。Chirp signal is a signal whose frequency changes continuously with time according to a certain rule. Due to its excellent autocorrelation characteristics, Chirp signal has important application in real-time high-precision spectrum measurement. This paper introduces the characteristics of the Chirp signal and the principle of spectrum measurement based on the pulse compression. It reviews the development of Chirp Transform Spectrometer （CTS） and its application in measurement of infrared spectrum of planetary atmosphere and comets for the last 30 years. Considering the latest electronic technologies, the development trend of CTS is pointed out.

关 键 词：CHIRP信号 脉冲压缩 Chirp变换频谱仪 行星大气探测 声表面波滤波器 

分 类 号：P111.4[天文地球—天文学] P407.6