Srivani K.S., Girish B.S., Mayuri S. Rao, Saurabh Singh, Adarsh Kumar Dash, Narendra S., Yash Agrawal, Keerthipriya S., Somashekar R., Madhavi S., Jacob Rajan, Udaya Shankar N., Seetha S.
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引用次数: 0
摘要
利用来自氢的信号探测宇宙再电离(PRATUSH)是一种拟议的天基辐射计,旨在探测来自宇宙黎明的平均21厘米的天空信号——宇宙演化的关键阶段。PRATUSH将在55-110 MHz的频率范围内工作。PRATUSH将在第一阶段进行近地轨道观测,然后在第二阶段进行月球轨道观测。数字相关光谱仪是PRATUSH辐射计不可或缺的子系统,可实现相位切换、天空光谱数字化和生成。PRATUSH实验室模型的数字相关光谱仪具有10位模数转换器(adc)和Virtex-6现场可编程门阵列(FPGA)。基于Raspberry Pi 4 Model b的单板计算机(SBC)作为主控制器,实时处理器和数据记录器,以最大限度地减少实验室模型的功率,质量和体积要求。本文介绍了PRATUSH实验室模型数字接收机的实现,使用SBC代替传统计算机所带来的挑战,并演示了与PRATUSH实验室模型模拟接收机集成时光谱仪的性能。
An SBC-based controller and processor for the laboratory model of PRATUSH digital receiver
Probing ReionizATion of the Universe using Signal from Hydrogen (PRATUSH) is a proposed space-based radiometer that aims to detect the sky-averaged 21-cm signal from Cosmic Dawn – a crucial phase in the cosmic evolution of the Universe. PRATUSH will operate in the frequency range of 55-110 MHz. PRATUSH will conduct observations in low earth orbit in its first phase, followed by lunar orbit in the second phase. Digital correlation spectrometer is an integral subsystem of PRATUSH radiometer, enabling phase switching, digitization and generation of sky spectrum. The digital correlation spectrometer for PRATUSH laboratory model features 10-bit analog-to-digital converters (ADCs) and a Virtex-6 Field Programmable Gate Array (FPGA). A Raspberry Pi 4 Model B-based single-board computer (SBC) serves as the master controller, real-time processor and data recorder, to minimize the power, mass and volume requirement of the laboratory model. This paper presents the implementation of the PRATUSH laboratory model digital receiver, challenges arising from the use of an SBC in place of a conventional computer, and demonstrates the performance of the spectrometer when integrated with the PRATUSH laboratory model analog receiver.
期刊介绍:
Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments.
Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields.
Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.