Browse > Article

A Study on Correlation Processing Method of Multi-Polarization Observation Data by Daejeon Correlator  

Oh, Se-Jin (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Yeom, Jae-Hwan (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Roh, Duk-Gyoo (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Jung, Dong-Kyu (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Hwang, Ju-Yeon (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Oh, Chungsik (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Kim, Hyo-Ryoung (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Publication Information
Journal of the Institute of Convergence Signal Processing / v.19, no.2, 2018 , pp. 68-76 More about this Journal
Abstract
In this paper, we describe the correlation processing method of multi-polarization observation data of the Daejeon Correlator. VLBI observations include single or multiple polarized observations depending on the type of object. Polarization observations are performed to observe the characteristics of the object. During the observations of the celestial object, polarization measurements are also performed to determine the delay values and causes of changes in the object. Correlation processing of polarization observation data of the Daejeon correlator is proposed by OCTAVIA of a synchronous reproduction processing apparatus that outputs data input to each antenna unit by using an output bit selection function to convert bits and the order of the data streams is changed, And the input of the Daejeon correlator is configured to perform the polarization correlation processing by conducting correlation processing by setting the existing stream number to be the same. Correlation processing is conducted on the test data observed for the polarization correlation processing and it is verified through experiments that the polarization correlation processing method of the proposed Daejeon correlator is effective.
Keywords
Polarization Observation; Multi-Polarization Correlation; Post-Correlation Processing Software; CODA/FITS; Daejeon Correlator;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Takahashi F., Kondo T., and Koyama Y., Very Long Baseline Interferometer, Ohmsha, 2000, pp. 35-55.
2 Thompson, A. R., Moran, J. M., and Swenson, G. W.Jr., Interferometry and Synthesis in Radio Astronomy, 2nd Ed., (New York:John Wiley & Sons), 2001, pp. 289.
3 Duk-Gyoo Roh, Se-Jin Oh, and Jae-Hwan Yeom et al., "2008 Annual Report on Korea-Japan Joint VLBI Correlator and Receiver Development," Korea Astronomy and Space Science Institute, pp. 3-100, 2008.
4 Se-Jin Oh, Duk-Gyoo Roh, and Jae-Hwan Yeom et al. (2011, October), Performance Evaluation for VLBI Correlation Subsystem Main Product, Journal of The Institute of Signal Processing and Systems, 12(4), pp. 322-331.
5 T. Oyama et al., "The development and performance of a new 4Gbps disk recorder and eVLBI systems using a 10GbE network," 2008 General Meeting of IVS, 2008.