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First Results of the VLBI-Investigation of Sources from Geodetic IRIS-Experiments

Published online by Cambridge University Press:  03 August 2017

C. J. Schalinski ,
W. Alef ,
A. Witzel ,
J. Campbell  and
H. Schuh
C. J. Schalinski
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, F.R.G.
W. Alef
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, F.R.G.
A. Witzel
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, F.R.G.
J. Campbell
Affiliation:
Geodätisches Institut der Universität Bonn, F.R.G.
H. Schuh
Affiliation:
Geodätisches Institut der Universität Bonn, F.R.G.

Extract

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The geodetic IRIS-network is a transatlantic 5-station VLBI-array dedicated to monitor variations of the earth's rotation (e.g. Carter et al., 1985). In a 5 day cycle 14 extragalactic radio sources are observed in regular intervals, covering a GST-range of up to 24 hours, using the MkIII-system in Mode C at 3.6cm (X-band) and 13cm (S-band) wavelength. As this database provides a great potential to monitor source structures and their changes with mas-resolution (the sample contains at least 7 “superluminals”), we have initiated a project to obtain radio maps at both frequencies and to determine, how accurate physical parameters like component flux densities and separations can be measured. Early results are published in Schalinski (1985) and Schalinski et al. (1986). In addition to astrophysical applications, we investigate the influence of structure phases on phase- and group-delay corrections (s. Campbell et al., this vol.).

Type
Geophysics
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 359 - 360
Copyright
Copyright © Reidel 1988 

References

Carter, W.E., Robertson, D.S., Mackay, J., 1985: Journ. of Geophys. Res., 90, 4577 Google Scholar
Eckart, A., Witzel, A., Biermann, P., Johnston, K.J., Simon, R., Schalinski, C.J., Kühr, H., 1986: Astron. & Astrophys., 168, 17 Google Scholar
Schalinski, C.J., 1985: , Universität Bonn Google Scholar
Schalinski, C.J., Alef, W., Campbell, J., Schuh, H., Witzel, A., 1986: Die Arbeiten des SFB 78 Satellitengeodäsie der TU München 1984 und 1985, ed.Schneider, M. (München: Bayerische Akademie der Wissenschaften), 292 Google Scholar