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Development of K4 Correlator for Pulsar VLBI: Japan-Russia Baseline

Published online by Cambridge University Press:  12 April 2016

M. Sekido ,
S. Hama ,
H. Kiuchi ,
M. Imae ,
Y. Hanado ,
Y. Takahashi ,
A. E. Rodin  and
Y. P. Ilyasov
M. Sekido
Affiliation:
Communications Research Laboratory, 893-1 Hirai, Kashima Ibaraki 314, Japan
S. Hama
Affiliation:
Communications Research Laboratory, 893-1 Hirai, Kashima Ibaraki 314, Japan
H. Kiuchi
Affiliation:
Communications Research Laboratory, 893-1 Hirai, Kashima Ibaraki 314, Japan
M. Imae
Affiliation:
Communications Research Laboratory, 893-1 Hirai, Kashima Ibaraki 314, Japan
Y. Hanado
Affiliation:
Communications Research Laboratory, 893-1 Hirai, Kashima Ibaraki 314, Japan
Y. Takahashi
Affiliation:
Communications Research Laboratory, 893-1 Hirai, Kashima Ibaraki 314, Japan
A. E. Rodin
Affiliation:
Lebedev Physical Institute, Pushchino Radio Observatory, Russia
Y. P. Ilyasov
Affiliation:
Lebedev Physical Institute, Pushchino Radio Observatory, Russia

Abstract

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We are doing astrometric pulsar VLBI observation with Kashima-Kalyazin 7000 km baseline. K4 correlator is under the development for this observation program. When XF type correlator is used for pulsar processing with gating, attention should be paid to avoid fluctuation on delay result due to fractional bit effect. This influence is serious around the point that bit shift for delay tracking and pulsar period is synchronized. In this paper, the K4 correlation system is introduced and fractional bit effect on pulsar processing is explained.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 403 - 404
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

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