Library for Baseband (lbb)是一个自研的用于读取解析甚长基线干涉测量(Very Long Baseline Interferometry, VLBI)基带数据的工具库,主要用于VLBI观测中对终端基带数据的读取、解析及输出结果分析.该软件库通过对基带数据的自动判断,...Library for Baseband (lbb)是一个自研的用于读取解析甚长基线干涉测量(Very Long Baseline Interferometry, VLBI)基带数据的工具库,主要用于VLBI观测中对终端基带数据的读取、解析及输出结果分析.该软件库通过对基带数据的自动判断,自动实现读取不同数据格式的功能,并提供了各种各样的API (Application Programming Interface)功能供用户调用.目前lbb软件库已经成功应用在了探月工程VLBI测轨任务中的硬件相关处理机配置项和测地VLBI观测数据的预处理.文章详细介绍了lbb软件库的设计、功能及用法.展开更多
为了开展雷达天文科学研究,将射电望远镜接收的雷达回波信号进行采集和记录,研究基于SNAP(Smart Network ADC(Analog to Digital Converter)Processor)硬件实验板和快速存储服务器设计并开发了雷达天文基带数据采集与记录系统.该系统采...为了开展雷达天文科学研究,将射电望远镜接收的雷达回波信号进行采集和记录,研究基于SNAP(Smart Network ADC(Analog to Digital Converter)Processor)硬件实验板和快速存储服务器设计并开发了雷达天文基带数据采集与记录系统.该系统采用CASPER(Collaboration for Astronomy Signal Processing and Electronics Research)提供的图形化FPGA(Field Programmable Gate Array)开发工具流,设计了双通道、256 MHz带宽信号采集和VDIF(VLBI(Very Long Baseline Interferometry)Data Interchange Format)基带数据输出固件程序;基于HASHPIPE(High Availability SHared PIPeline Engine)多线程管理引擎开发了双万兆以太网口实时基带数据存储程序,存储带宽达到1 GB/s;最后编写了VDIF格式到雷达天文格式的转换程序.经过脉冲星信号观测实验检测,该系统准确、可靠.展开更多
Distributed/parallel-processing system like sun grid engine(SGE) that utilizes multiple nodes/cores is proposed for the faster processing of large sized satellite image data. After verification, distributed process en...Distributed/parallel-processing system like sun grid engine(SGE) that utilizes multiple nodes/cores is proposed for the faster processing of large sized satellite image data. After verification, distributed process environment for pre-processing performance can be improved by up to 560.65% from single processing system. Through this, analysis performance in various fields can be improved, and moreover, near-real time service can be achieved in near future.展开更多
文摘为了开展雷达天文科学研究,将射电望远镜接收的雷达回波信号进行采集和记录,研究基于SNAP(Smart Network ADC(Analog to Digital Converter)Processor)硬件实验板和快速存储服务器设计并开发了雷达天文基带数据采集与记录系统.该系统采用CASPER(Collaboration for Astronomy Signal Processing and Electronics Research)提供的图形化FPGA(Field Programmable Gate Array)开发工具流,设计了双通道、256 MHz带宽信号采集和VDIF(VLBI(Very Long Baseline Interferometry)Data Interchange Format)基带数据输出固件程序;基于HASHPIPE(High Availability SHared PIPeline Engine)多线程管理引擎开发了双万兆以太网口实时基带数据存储程序,存储带宽达到1 GB/s;最后编写了VDIF格式到雷达天文格式的转换程序.经过脉冲星信号观测实验检测,该系统准确、可靠.
基金supported by the Sharing and Diffusion of National R&D Outcome funded by the Korea Institute of Science and Technology Information
文摘Distributed/parallel-processing system like sun grid engine(SGE) that utilizes multiple nodes/cores is proposed for the faster processing of large sized satellite image data. After verification, distributed process environment for pre-processing performance can be improved by up to 560.65% from single processing system. Through this, analysis performance in various fields can be improved, and moreover, near-real time service can be achieved in near future.
