KMS of Xinjiang Astronomical Observatory, CAS
| 用于雷达天文研究的高速基带数据记录系统 | |
| Alternative Title | High-Speed Baseband Data Recording System for Radar Astronomy Research |
安秀梅
| |
| Subtype | 硕士 |
| Thesis Advisor | 陈卯蒸 |
| 2021-06-01 | |
| Degree Grantor | 中国科学院大学 |
| Place of Conferral | 北京 |
| Degree Name | 理学硕士 |
| Degree Discipline | 天文技术与方法 |
| Keyword | SNAP CASPER 基带数据 雷达天文 高速存储 |
| Abstract | 射电天文学作为天文学的一个分支，利用无线电接收技术在无线电波段使用射电望远镜接收并研究来自宇宙中各类天体发射的电磁波。目前随着射电天文学研究的范围越来越广，射电天文学研究人员不局限于只接收来自宇宙天体的无线电波，还利用雷达天线向天体发射电磁波，在电磁波受到反射后研究其接收到的回波信号，于是作为射电天文学的一个分支—雷达天文学应运而生，它利用射电望远镜接收端收集指定方向目标天体的反射回波，同时抑制其他方向的杂波或干扰，通过提取和分析回波信号中目标天体的相关信息，测量天体的距离和方位，研究天体的物理特征、运动状态和空间分布。本设计为了开展雷达天文科学研究，根据雷达天文项目实际需求，使用某雷达向目标天体发射电磁波信号，由乌鲁木齐南山26米射电望远镜接收其反射的回波信号，基于 SNAP（Smart Network ADC Processor）硬件实验板和快速存储服务器设计开发了雷达天文基带数据采集与记录系统，对望远镜接收到的海量回波数据进行实时采集、格式化与存储。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、256MHz 带宽信号采集和 VDIF（VLBI 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 1GB/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。 |
| Other Abstract | As a branch of astronomy, radio astronomy uses radio reception technology to use radio telescopes in the radio band to receive and study electromagnetic waves emitted from various celestial bodies in the universe. With the increasing scope of radio astronomy research, radio astronomy researchers are not limited to only receiving radio waves from celestial bodies in the universe, but also use radar antennas to transmit electromagnetic waves to celestial bodies, and study the echoes they receive after the electromagnetic waves are reflected. The signal was born as a branch of radio astronomy-the application of radar astronomy. It uses the receiving end of the antenna to collect the reflected echo of the target celestial body returning in the specified direction, while suppressing the clutter or interference in other directions, by extracting and analyzing the echo the relevant information of the target celestial body in the signal, measure the distance and orientation of the celestial body, and study the physical characteristics, movement state and spatial distribution of the celestial body.In this design, in order to carry out radar astronomical scientific research, according to the actual needs of radar astronomy projects, a radar is used to transmit electromagnetic signals to the target celestial body, and the reflected echo signals are received by the Nanshan 26-meter radio telescope, based on SNAP (Smart Network ADC Processor) hardware experiments The board and fast storage server have designed and developed a radar astronomical baseband data acquisition and recording system to collect, process and store the massive echo data received by the telescope in real time.The system uses the graphical FPGA (Field Programmable Gate Array) development tool flow provided by CASPER (Collaboration for Astronomy Signal Processing and Electronics Research), and has designed dual-channel, 256MHz bandwidth signal acquisition and VDIF (VLBI Data Interchange Format) baseband data output firmware Program; Based on the HASHPIPE (High Availability SHared PIPeline Engine) multi-threaded management engine, a real-time baseband data storage program with dual 10 Gigabit Ethernet ports was developed, with a storage bandwidth of 1GB/s; finally, a conversion program from VDIF format to radar astronomy format was written. After the pulsar signal observation experiment, the system is accurate and reliable. |
| Pages | 55 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4728 |
| Collection | 研究生学位论文 |
| Affiliation | 中国科学院新疆天文台 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 安秀梅. 用于雷达天文研究的高速基带数据记录系统[D]. 北京. 中国科学院大学,2021. |
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| 用于雷达天文研究的高速基带数据记录系统_（3850KB） | 学位论文 | 暂不开放 | CC BY-NC-SA | Application Full Text | ||
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