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KVN을 위한 디지털 데이터 처리 시스템의 성능평가 KCI 등재

PERFORMANCE EVALUATION OF DIGITAL DATA PROCESSING SYSTEM FOR KOREAN VLBI NETWORK(KVN)

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  • URLhttps://db.koreascholar.com/Article/Detail/390374
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천문학논총 (Publications of the Korean Astronomical Society)
한국천문학회 (Korean Astronomical Society)
초록

In this paper, we introduce the performance test results of digital data processing system for KVN (Korean VLBI Network). The digital data processing system for KVN consists of DAS (Data Acquisition System) and high-speed recorder which called Mark5B system. DAS system performs the digitalization of analog radio signal through ADS-1000 gigabit sampler with 1 Gsps/2-bit and process the digital filtering of digital signal. Mark5B system records the output data of DFB (Digital Filter Bank) with about 1 Gbps. In this paper, we carried out the preliminary evaluation experiments of the KVN digital data processing system connected between DAS system and Mark5B with VSI (VLBI Standard Interface) interface which is designed for compatible in each VLBI system. We first performed all of the KVN digital data processing system connected by VSI interface in the world. In factory inspection phase, we found that the DAS system has a memory read/write error in DSM (Digital Spectrometer) by analyzing the recorded data in Mark5B system. We confirmed that the DSM memory error has been correctly solved by comparing DSM results with Mark5B results. The effectiveness of KVN digital data processing system has been verified through the preliminary experiments such as data transmission, recording with VSI interface connection and data analysis between DSM and Mark5B system. In future work, we will perform the real astronomical observation by using the KVN 21m radio telescopes so as to verify its stability and performance.

저자
  • 오세진(한국천문연구원) | SE-JIN OH (Korea Astronomy and Space Science Institute)
  • 노덕규(한국천문연구원) | DUK-GYOO ROH (Korea Astronomy and Space Science Institute)
  • 염재환(한국천문연구원) | JAE-HWAN YEOM (Korea Astronomy and Space Science Institute)
  • 변도영(한국천문연구원) | DO-YOUNG BYUN (Korea Astronomy and Space Science Institute)
  • 이창훈(한국천문연구원) | CHANG-HOON LEE (Korea Astronomy and Space Science Institute)
  • 정현수(한국천문연구원) | HYUN-SOO CHUNG (Korea Astronomy and Space Science Institute)
  • 제도흥(한국천문연구원) | DO-HEUNG JE (Korea Astronomy and Space Science Institute)
  • Kiyoaki Wajima(야마구치 대학)
  • Kazuyuki Kawakami(Elecs Industry Ltd.)