航天返回与遥感
航天返迴與遙感
항천반회여요감
SPACECRAFT RECOVERY & REMOTE SENSING
2013年
4期
59-65
,共7页
干涉%傅里叶变换光谱仪%微振动%鬼线%星载
榦涉%傅裏葉變換光譜儀%微振動%鬼線%星載
간섭%부리협변환광보의%미진동%귀선%성재
interference%Fourier Transform Spectrometer (FTS)%micro-vibration%ghost line%space borne
文章介绍了一种利用星载傅里叶光谱仪（FTS）进行大气成份探测方法。该光谱仪基于动镜干涉原理，采用空心角镜摆臂扫描、计量激光进行触发的采样方式，实现光谱探测。这种设计尽可能的减轻了FTS在采样过程中卫星平台的振动对干涉效果和光谱数据的影响。文章首先介绍了星载傅里叶变换光谱仪的在轨工作模式、系统组成和干涉模块的光学方案，给出了微振动对傅里叶光谱仪干涉信号和光谱信号影响的数学模型，针对卫星平台微振动的频率和振幅特性，开展了典型工况条件下干涉信号和光谱信号的仿真计算。仿真结果显示随着振动量级增大，光谱图上的鬼线幅值明显增大；另外，延迟匹配精度对探测精度具有重要影响，延迟匹配误差越大，产生的鬼线幅值越大。分析表明，在小于卫星平台的微振动幅度（30×10-3gn）时，微振动对星载傅里叶变换光谱仪的影响可以控制在可接受范围内。
文章介紹瞭一種利用星載傅裏葉光譜儀（FTS）進行大氣成份探測方法。該光譜儀基于動鏡榦涉原理，採用空心角鏡襬臂掃描、計量激光進行觸髮的採樣方式，實現光譜探測。這種設計儘可能的減輕瞭FTS在採樣過程中衛星平檯的振動對榦涉效果和光譜數據的影響。文章首先介紹瞭星載傅裏葉變換光譜儀的在軌工作模式、繫統組成和榦涉模塊的光學方案，給齣瞭微振動對傅裏葉光譜儀榦涉信號和光譜信號影響的數學模型，針對衛星平檯微振動的頻率和振幅特性，開展瞭典型工況條件下榦涉信號和光譜信號的倣真計算。倣真結果顯示隨著振動量級增大，光譜圖上的鬼線幅值明顯增大；另外，延遲匹配精度對探測精度具有重要影響，延遲匹配誤差越大，產生的鬼線幅值越大。分析錶明，在小于衛星平檯的微振動幅度（30×10-3gn）時，微振動對星載傅裏葉變換光譜儀的影響可以控製在可接受範圍內。
문장개소료일충이용성재부리협광보의（FTS）진행대기성빈탐측방법。해광보의기우동경간섭원리，채용공심각경파비소묘、계량격광진행촉발적채양방식，실현광보탐측。저충설계진가능적감경료FTS재채양과정중위성평태적진동대간섭효과화광보수거적영향。문장수선개소료성재부리협변환광보의적재궤공작모식、계통조성화간섭모괴적광학방안，급출료미진동대부리협광보의간섭신호화광보신호영향적수학모형，침대위성평태미진동적빈솔화진폭특성，개전료전형공황조건하간섭신호화광보신호적방진계산。방진결과현시수착진동량급증대，광보도상적귀선폭치명현증대；령외，연지필배정도대탐측정도구유중요영향，연지필배오차월대，산생적귀선폭치월대。분석표명，재소우위성평태적미진동폭도（30×10-3gn）시，미진동대성재부리협변환광보의적영향가이공제재가접수범위내。
This paper introduces an approach to detecting the composition of atmosphere by using space-borne Fourier Transform Spectrometer (FTS), and presents the working principle and system constitution. The FTS is based on Michelson interferometer. A rotating arm carrying a pair of cube comer retro-reflectors is used to produce optical path difference (OPD), and an interferogram of metrology laser is used to trigger the equal OPD interval data acquisition. It is well known that FTS is highly sensitive to micro-vibration distur-bances. However, a wide variety of mechanical disturbances are present as the satellite is in orbit. For this end, this paper investigates the influence of micro-vibration on the space-borne FTS. A theoretical model is firstly derived. Then, according to the characteristic of dynamic environment in orbit, the variation of spectra in re-sponse to micro-vibration levels is simulated. The results show that the amplitudes of ghost lines in spectra in-crease rapidly with the increasing of micro-vibration level. In addition, the time delay mismatch has significant impact on the spectra, the amplitudes of ghost lines in spectra increase with the increasing of time delay mis-match. The analysis indicates that the influence of micro-vibration on space-borne FTS is allowable when the micro-vibration level is below 30×10-3gn.
