一种全谱段多光谱遥感器的星上信息处理系统  

Signal process system for space-borne multi-spectral sensor

作　　者：戴立群[1] 徐丽娜[1] 周建勇[2] DAI Li-qun XU Li-na ZHOUJtan-yong(Beijing Institute of Space Mechanics＆Electricity, Beijing 100094, China Chongqing Optoelectronics Research Institute, Chongqing 400060, China)

机构地区：[1]北京空间机电研究所,北京100094 [2]重庆光电技术研究所,重庆400060

出　　处：《激光与红外》2017年第6期761-766,共6页Laser & Infrared

摘　　要：全谱段多光谱星上信息处理系统应用于某型号多光谱遥感器,由可见光信息处理电路及红外信息处理电路构成。该系统基于推扫成像的遥感器设计方案,通过外同步控制方式,完成了可见光、短中波红外、长波红外探测器的时序控制与驱动、模拟信号采集与处理、数字信号整合与格式编排等功能,具有多焦面同步工作、采集模拟通道多、信噪比高的特点。最终系统共采集32路模拟图像信号,输出量化位数为14 bit,五路串行LVDS输出,单路数据率为30 Mbps。在给定的测试条件下,实验室环境实测可见光通道、短波红外通道信噪比分别达到307和422,中波红外通道、长波红外通道NETD分别达到0.14 K和0.16 K。并使用可见光通道进行了外景成像,得到了良好的图像数据。通过实验室测试及外景成像验证了本系统能够满足遥感器使用需求。Signal process system is applied in a space-borne multi-spectral sensor,and it is composed of visual infor- mation process circuit and infrared information process circuit. Based on pushbroom imaging,the system adopted ex- ternal synchronous control to complete some functions of visual, short-wave infrared, middle-wave infrared and long- wave infrared detectors, including sequential control and driving, collecting and processing of analog signals, integra- tion and formatting of digital signals. This system has the characteristics of multi FPA synchronization, large number of analog outputs, high signal to noise ratio. Eventually, the system samples 32 analog video signals, outputs 14bit data and 5 serial LVDS channels by 30 Mbps transmission rate in single channel. Under given test conditions in laborato- ry,the results indicate that the SNRs of visual and short-wave infrared channel are 307 and 422, meanwhile the NETDs of middle-wave and long-wave infrared channel are O. 14 K and 0. 16 K. An imaging experiment in visual channel acquired good image data. The test in laboratory proves that the system can meet the demands of muhi-spec- tral sensor application.

关 键 词：空间多光谱遥感器 信息获取与处理 信噪比 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]