Hostname: page-component-77c89778f8-vsgnj Total loading time: 0 Render date: 2024-07-18T20:48:16.088Z Has data issue: false hasContentIssue false
  • English
  • Français

Stability of the Extragalactic Reference Frame Realized by VLBI

Published online by Cambridge University Press:  12 April 2016

C. Ma  and
D.B. Shaffer
C. Ma
Affiliation:
Geodynamics Branch Goddard Space Flight Center Greenbelt, MD 20771USA
D.B. Shaffer
Affiliation:
Geodynamics Branch Goddard Space Flight Center Greenbelt, MD 20771USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The 318 compact extragalactic radio sources with positions derived from dual frequency Mark III VLBI data acquired by the geodetic and astrometric programs of NASA, NOAA, NRL and USNO form a celestial reference frame with stability in orientation and relative position at the 1 mas level. This paper examines the reference frame realized using 461,000 observations from 1021 observing sessions between 1979 August and 1990 August in the NASA Crustal Dynamics Project VLBI data base. Catalogs of positions estimated from subsets of data (annual, seasonal, network) show differences in orientation typically less than 1 mas provided precession and nutation are adjusted using a reference day. For 17 sources with >5 year time span and >200 one-day position estimates, the rates of change of right ascension and declination are generally less than 5 mas/century, giving upper limits on real motion.

Type
Part 1. Oral Papers
Information
International Astronomical Union Colloquium , Volume 127: Reference Systems , 1991 , pp. 135 - 144
Copyright
Copyright © United States Naval Observatory 1991

References

Arias, E.F. et al. (1988). Astron. Astrophys. 199, 357.Google Scholar
Bartel, N. et al. (1986). Nature 319, 733.Google Scholar
Fanselow, J.L. et al. (1984). Astron. J. 89, 987.CrossRefGoogle Scholar
Ma, C. et al. (1986). Astron. J. 92, 1020.CrossRefGoogle Scholar
Ma, C. (1990) in Lieske, J.H. and Abalakin, V.K. (Eds.), IAU Symp. 141, Kluwer, Dordrecht, p. 271.Google Scholar
Ma, C. et al. (1990). Astron. J. 99, 1284.Google Scholar
Ma, C. et al. (1990). J. Geophys. Res. Solid Earth, in press.Google Scholar
McCarthy, D.D. (Ed.). IERS Technical Note 3, Observatoire de Paris, Paris, p. 71.Google Scholar
Robertson, D.S. et al. (1986). Astron. J. 91, 1456.Google Scholar
Russell, J.L. et al. (1990). Astron. J., in press.Google Scholar
Sovers, O.J. et al. (1988). Astron. J. 95, 1647.Google Scholar
Sovers, O.J. (1990) in Lieske, J.H. and Abalakin, V.K. (Eds.), IAU Symp. 141, Kluwer, Dordrecht, p. 261.Google Scholar
Sovers, O.J. (1991) in Hughes, J.A. (Ed.), IAU Colloq. 127, USNO, Washington, in press.Google Scholar