• Title/Summary/Keyword: Astronomy division

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THERMAL ANALYSIS OF FIMS TDC AND LVPS ELECTRONIC BOARDS (원자외선 분광기 TDC 및 LVPS 전자보드의 열 해석)

  • Seon, K.I.;Yuk, I.S.;Nam, U.W.;Jin, H.;Park, J.H.;Rhee, J.G.;Ryu, K.S.;Lee, D.H.;Oh, H.S.;Kong, K.K.;Han, W.;Min, K.W.;Edelstein, J.;Korpela, E.
    • Journal of Astronomy and Space Sciences
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    • v.19 no.4
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    • pp.283-292
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    • 2002
  • Electronic boards of Far-ultraviolet IMaging Spectrograph (FIMS) should be designed to maintain their performances, and their temperatures should be remained within the allowed temperatures in operational environments. Thermal analysis at the electronic board level has been performed, and it is confirmed the electronics parts could be kept within their allowed temperature ranges.

A Study on Comparison of Massive Data Recording Equipments for VLBI Radio Observation Data (VLBI 전파 관측데이터를 위한 대용량 기록장치 비교에 관한 연구)

  • Oh, Se-Jin;Yeom, Jae-Hwan;Roh, Duk-Gyoo;Jung, Dong-Kyu;Hwang, Ju-Yeon;Oh, Chungsik;Kim, Hyo-Ryoung
    • Journal of the Institute of Convergence Signal Processing
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    • v.19 no.3
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    • pp.125-132
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    • 2018
  • KVN(Korean VLBI Network) introduced the Mark6 system of the MIT haystack observatory as a recorder for data recording up to 32 Gbps for VLBI(Very Long Baseline Interferometry) observation. The Mark6 recorder can record data at up to 32Gbps when two systems and 64 HDDs are installed. However, because of the unique recording method that is characteristic of Mark6, we are introducing a large amount of data into a virtual file system, or using a general RAID method, which causes data loss when reading and transferring files at the highest recording speed or file system have. The Flexbuff system, a software recorder developed by JIVE(Joint Institute for VLBI ERIC), can be configured to operate as a data recorder through RAID configuration and network upgrades. In particular, when installed in the Mark6 system, it can record VLBI data at a maximum speed of 32 Gbps with less loss of data compared to the existing Mark6 by utilizing Mark6 resources well. In this paper, we propose that the existing Mark6 system can be operated as Mark6-Flexbuff by installing jive5ab software, and it is verified through experiment that it can be effectively used for VLBI observation operation through data recording test.