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A Study on the Test Results and Wideband Observing of the Korean VLBI Network  

Oh, Se-Jin (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Oyama, Tomoaki (Mizusawa VLBI Radio Observatory, National Astronomical Observatory of Japan)
Yeom, Jae-Hwan (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Nishikawa, Takashi (Mizusawa VLBI Radio Observatory, National Astronomical Observatory of Japan)
Roh, Duk-Gyoo (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Kim, Seung-Rae (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Lee, Eui-Gyeom (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Je, Do-Heung (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Byun, Do-Young (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Lee, Seong-Mo (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Chung, Hyun-Soo (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Publication Information
Journal of the Institute of Convergence Signal Processing / v.17, no.2, 2016 , pp. 83-92 More about this Journal
Abstract
In this paper, we introduce the results of the testing and observation systems for performance wideband expansion in the Korean VLBI Network(KVN). The KVN performs VLBI observations to 1024 Mbps data rate, and 8192 Mbps observing for four simultaneous observation is now evaluating for normal operation. The VLBI stations in several world countries developed their own wideband observing systems to observe the celestial objects with high precision and high resolution or are working with several countries. The KVN is planning to introduce a high-speed sampler, OCTAD, for sampling directly up to 2048 MHz bandwidth for RF signal of K/Q/W/D band in the frequency band without conversion. Therefore, as a preliminary study for the performance scalability of the KVN then through the close cooperation with National Astronomical Observatory of Japan (NAOJ), the OCTAD high-speed sampler and OCTADISK2 high-speed recorder were installed in the KVN Yonsei station, and verify the performance through a wideband.
Keywords
KVN; KaVA; Wideband observing system; RF Direct Sampler; High-speed recorder;
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