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arXiv 1412.0481astro-ph.IM
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用于天基实时伽马射线暴探测的科学触发单元II --数据处理模型和基准

A Scientific Trigger Unit for Space-Based Real-Time Gamma Ray Burst Detection, II - Data Processing Model and Benchmarks

Hervé Le Provost, Stéphane Schanne, Christophe Flouzat, Pierre Kestener, Thomas Chaminade, Modeste Donati, Frédéric Château, François Daly, Jean Fontignie

备注：
6 pages, 10 figures, published in Proceedings of IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), Issue Date: Oct. 27 2013-Nov. 2 2013
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摘要：

科学触发装置（UTS）是一种卫星设备，旨在探测由机载6400像素照相机ECLAIR观测到的伽马射线暴（GRB）。预计它将装备在低地球轨道的法国-中国卫星SVOM上，并作为该飞行任务的伽马射线暴触发装置。UTS实时和详细地分析机载相机数据，以选择GRB，触发航天器回转，为窄视场仪器重新定位每个GRB，并提醒地面望远镜网络进行GRB后续观测。预计相机每周会观察到几个伽马射线暴; UTS的目标是接近100%的触发效率，同时有足够的选择性以避免虚假警报。这是通过在基于FPGA数据预处理器和具有实时操作系统的CPU的耐辐射硬件上运行复杂的科学算法来实现的。UTS是一个科学的软件，固件和硬件共同开发。已经开发了一个数据处理模型（Data Processing Model），以充分验证受ITAR限制影响的所有技术选择。该固件允许评估处理能力和存储器带宽，并调整软件和固件之间的负载平衡。本文介绍了UTS的功能和体系结构。它突出了与完整的伽玛射线暴触发算法上实现的抗辐射ITAR免费处理器所获得的结果。

英文摘要：

The Scientific Trigger Unit (UTS) is a satellite equipment designed to detect Gamma Ray Bursts (GRBs) observed by the onboard 6400 pixels camera ECLAIRs. It is foreseen to equip the low-Earth orbit French-Chinese satellite SVOM and acts as the GRB trigger unit for the mission. The UTS analyses in real-time and in great details the onboard camera data in order to select the GRBs, to trigger a spacecraft slew re-centering each GRB for the narrow field-of-view instruments, and to alert the ground telescope network for GRB follow-up observations. A few GRBs per week are expected to be observed by the camera; the UTS targets a close to 100% trigger efficiency, while being selective enough to avoid fake alerts. This is achieved by running the complex scientific algorithms on a radiation tolerant hardware, based on a FPGA data pre-processor and a CPU with a Real-Time Operating System. The UTS is a scientific software, firmware and hardware co-development. A Data Processing Model (DPM) has been developed to fully validate all the technical choices deeply impacted by the ITAR restriction applied to the development. The DPM permits to evaluate the processing power and the memory bandwidth, and to adjust the balance load between software and firmware. This paper presents the UTS DPM functionalities and architecture. It highlights the results obtained with the full GRB trigger algorithms implemented on a rad-tolerant ITAR-free processor.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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