Review of Geostationary Interferometric Infrared Sounder

来源 :ChineseOpticsLetters | 被引量 : 0次 | 上传用户:owenming521
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
To measure the global atmospheric three-dimensional distribution and change of temperature and humidity is one of the key areas in atmospheric remote sensing detection; it is also a new research and development direction in the field of meteorological satellite application. As a main element of China second generation of geostationary meteorological satellite Fengyun 4 (FY-4), which was launched on Dec. 11, 2016, the Geostationary Interferometric Infrared Sounder (GIIRS) is the first interferometric infrared sounder working on geostationary orbit internationally. It is used for vertical atmospheric sounding and gains atmospheric temperature, humidity, and disturbances. The combination of Fourier transform spectrometer technology and infrared detectors makes GIIRS have high spectral resolution and large coverage over spatial areas. With this kind of instrument, meteorological satellites can improve the capabilities for severe weather event monitoring and numerical weather prediction. Here a concise review of the GIIRS development project, including its history, missions and functions, technical design, key technologies, system integration, calibration and in-orbit operation status, etc., is presented.
其他文献
期刊
为解决脉冲信号对导频产生干扰进而导致马赫-曾德尔电光调制器(MZM)工作点无法稳定的问题,提出了一种导频自适应的偏压控制技术。采用数字控制系统生成频率可变的导频,由快速傅里叶变换分析反馈信号的谐波分量,可以将MZM锁定于传输曲线的最低偏置点。通过实时监测偏置电压输出,自主改变导频频率,避免脉冲信号对导频的影响,实现了高消光比的激光脉冲调制。结果表明,激光脉冲的重复频率与导频一次谐波频率接近时,脉冲信号会影响调制器工作点的稳定,该系统可以实现导频频率在0.45~2 kHz范围内的自适应变化,满足不同重复频率
期刊
钛宝石晶体是超强、超短脉冲激光振荡源广泛采用的工作物质,其口径大小和表面全频域波面误差决定了超短、超强激光系统的输出能量和光束质量,然而由于大口径钛宝石晶体光学均匀性差及硬度高的特点,其实现高精度透射波前和超光滑表面加工很具挑战性。针对这一问题,设计了线偏振干涉光源检测方法,解决了钛宝石晶体双折射导致的透射波前检测干涉条纹无法解析的问题;基于对钛宝石晶体材料光学均匀性的检测分析,发展了基于单轴机的透射波前快速抛光收敛工艺;通过正交实验和灰关联分析法,利用小磨头抛光工艺实现了钛宝石晶体高精度透射波前低频误差
期刊
We present a down-looking synthetic aperture imaging ladar demonstrator and its experiments over 1.2 km in the field. The achieved imaging resolution is in agreement with the theoretical design, and the resulting two-dimensional image is satisfied. The ca
We propose a novel pressure sensor based on the combination of the ring resonator with two straight waveguides and a two-end fixed beam. The principle of this device is acquiring the system static pressure by monitoring the changes in the transmission wav
期刊
针对变光照环境下给皮带撕裂视觉检测过程造成的识别干扰, 提出了一种基于洛伦兹信息测度(Lorentz Information Measure, LIM)分块的改进Ostu分割算法的结构光视觉检测方法。首先将红色线性激光投射到皮带表面, 通过CCD相机捕获高对比度图像; 然后利用LIM方法将ROI(Region of Interesting)区域根据其水平方向光照强度分块, 并逐块通过线性加权Ostu算法进行图像分割, 进而合并出整幅图像的激光条纹; 最后提取激光条纹中心线, 并对其信息特征进行分析比较,
最近已证明光辐射疗法(PBT)成为普通激光外科手术之外的另一种有效途径。PBT由红色染料激光和牛血中的萃取物即血卟啉衍生物(HpD)共同起作用。在使用光纤内窥镜的情况下,癌细胞被激光与注射入的HpD之间的独特光化学反应所破坏。
期刊
In this Letter, we propose an optical attenuator based on the phase modulation of a spatial light modulator (SLM). In this system, we use two polarized beam splitters (PBSs) to control the polarized light and one SLM to modulate the phase of the polarized