摘要
针对我国高精度立体测绘卫星系统中激光测高仪的在轨场地检校的技术需求,研制了激光脉冲探测器系统。系统采用高速PIN探测单元及高速数据采集电路实现了ns级脉宽激光脉冲的定量化采集,通过集成无线射频模块实现脉冲探测器的数据远程传输。为保证脉冲探测器的野外应用性能,系统进行了能量密度测试、能量响应一致性与稳定性测试、探测器测量视场角测试等。试验结果表明脉冲探测器可以实现1∼120 nJ·cm^(−2)的能量范围采集,能量响应的一致性优于5%,稳定性优于1.5%,并且可以实现±12°角度范围内的激光脉冲的有效采集。最终探测器成功应用到我国“高分七号”卫星激光测高仪的在轨检校中,获得了探测器阵列的有效激光触发数据,为激光测高仪的在轨检校试验提供了有效的数据支撑。
To meet the technical requirement of on-orbit ground calibration of laser altimeter in the high precision stereo mapping satellite system in China,a laser pulse detector system is developed.The system adopts high-speed PIN detection unit and high-speed data acquisition circuit to realize quantitative acquisition of ns laser pulse,and realizes remote transmission of pulse detector data through radio frequency module.In order to ensure the field application performance of the pulse detector,the energy density test,energy response consistency and stability test,the field of view(FOV)measurement have been carried out for the system.The test results show that the energy acquisition in the range of 1–120 nJ·cm^(−2) can be accomplished by pulse detector,with the consistency of energy response better than 5%and the stability better than 1.5%,and ±12° FOV can be realized.Finally,the detector has been successfully applied to the on-orbit calibration of the GF-7 satellite laser altimeter,and the effective laser trigger data of the detector array has been obtained,which provides effective data support for the on-orbit calibration test of the laser altimeter.
作者
刘恩超
李新
张允祥
杜沈达
郑小兵
LIU Enchao;LI Xin;ZHANG Yunxiang;DU Shenda;ZHENG Xiaobin(Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230036,China)
出处
《大气与环境光学学报》
CAS
CSCD
2021年第6期541-552,共12页
Journal of Atmospheric and Environmental Optics
基金
国家重点研发计划项目,2018YFB0504600,2018YFB0504604。
关键词
激光测高仪
能量采集
无线发送
脉冲探测器
laser altimeter
energy acquisition
wireless transmission
pulse detector
