Bulletin géodésique

, Volume 69, Issue 1, pp 49–59 | Cite as

Adjusting VLBI data to obtain geophysical information for mobile VLBI sites

  • W. H. Dillinger
  • M. D. Abell
Article
  • 52 Downloads

Abstract

We have used Very Long Baseline Interferometry (VLBI) data to compute the site coordinates and constant velocity components for 29 fixed antenna sites and 25 mobile sites. The three singularities which occur in the adjustment with respect to the rotation of the system have been resolved by a constraint holding the net rotation of seven fixed antennas, distributed on the stable portions of four of the geologic plates, to the net rotation for these sites as defined by the NNR-NUVEL1 no net rotation model. In order to achieve a minimally constrained adjustment of this type we have found it necessary to use a new adjustment procedure in which we solve for the coordinates of each site at the weighted mean epoch of all the observations involving that site.

Using the results of the above solution we have computed the departure for each site from the NNR-NUVEL1 rigid plate model. These departures show that the transition zone in western North America from the region of rigidity to the plate boundary is at least 400 km wide, in general agreement with Ward (1988,1990).

Keywords

Root Mean Square Difference Very Long Baseline Interferometry Pacific Plate North American Plate Very Long Baseline Interferometry Data 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. American Association of Petroleum Geologists, 1981: “Plate-Tectonic Map of the Circum-Pacific Region, Northwest Quadrant.” Post Office box 979, Tulsa, Oklahoma 74101.Google Scholar
  2. Argus, D.F., and R.G. Gordon (1991a) “No-net Rotation Model of Current Plate Velocities Incorporating Plate Motion Model NUVEL-1”,Geophys. Res. Lett. 18, pp 2039–2042.CrossRefGoogle Scholar
  3. Argus, D.F., and R.G. Gordon (1991b) “Current Sierra Nevada-North American Motion from Very Long Baseline Interferometry: Implications for the Kinematics of the Western United States”,Geology 19, pp 1085–1088.CrossRefGoogle Scholar
  4. Carter, W.E., D.S. Robertson, and F.W. Fallon (1989) “Polar Motion and UT1 Time Series Derived from VLBI,”IERS Technical Note 2, Observatoire de Paris, Paris, France, pp 35–36.Google Scholar
  5. Carter, W.E., D.S. Robertson, and J.R. MacKay (1985) “Geodetic Radio Interferometric Surveying: Applications and Results,”J. Geophys. Res. 90, pp 4577–4587.CrossRefGoogle Scholar
  6. Chao, C.C. (1972) “A Model for Tropospheric Calibration from Daily Surface and Radiosonde Balloon Measurements,” California Inst. Tech., Jet Propulsion Lab. Technical Memo. No. 391-350.Google Scholar
  7. Davis, J.L., Herring, T. A., Shapiro, I. I., Rogers, A. E. E., Elgered, G. (1985) “Geodesy by Radio Interferometry: Effects of Atmospheric Modeling Errors on Estimates of Baseline Length,”Radio Science 20, No. 6, pp 1593–1607.CrossRefGoogle Scholar
  8. DeMets, C., R.G. Gordon, D.E. Angus, and S.Stein (1990) “Current Plate Velocities,”Geophys. J. Int., 101, pp 425–478.CrossRefGoogle Scholar
  9. Dillinger, W.H. and D.S. Robertson (1986) “A Program for the Combined Adjustment of VLBI Observing Sessions,”Manuscripta Geodaetica 11, pp 278–281.Google Scholar
  10. Fallon, F.W., and Dillinger, W. H. (1992) “Crustal Velocities From Geodetic VLBI,”J. Geophys. Res. 97, pp 7129–7136.CrossRefGoogle Scholar
  11. Gordon, Richard G., and Stein, Seth (1992) “Global Tectonics and Space Geodesy”Science 256, pp 333–342.CrossRefGoogle Scholar
  12. Jordan, T.H., and J.B. Minster (1988) “Beyond Plate Tectonics: Looking at Plate Deformation with Space Geodesy,” inThe Impact of VLBI on Astrophysics and Geophysics, M.J. Reid and J.M. Moran, eds., Kluwer, Dordrecht, Holland, pp 341–350.Google Scholar
  13. Ma, C., Sauber, J. M., Bell, L. J., Clark, T. A. Gordon, D., Himwich, W. E., Ryan, J. W. (1990) “Measurement of Horizontal Motions in Alaska Using Very Long Baseline Interferometry,”J. Geophys. Res. 95, pp 21991–22011.CrossRefGoogle Scholar
  14. Ma, C., Caprette, D. S., Ryan, J. W. (1992a) “Earth Orientation Parameters, Site Positions with Estimated Site Velocities, and Source Positions from the NASA Crustal Dynamics Project using AM0-2 and Uniform Velocity for HRAS 085: Solution GLB831,”IERS Technical Note 11, pp 3–7, Observatoire de Paris, Paris, France.Google Scholar
  15. Ma, C., Ryan, J. W., Caprette, D. S. (1992b) Crustal Dynamics Project Data Analysis—1991; VLBI Geodetic Results 1979–1990, NASA Technical Memorandum 104522, GSFC Greenbelt Md.Google Scholar
  16. McCarthy, D. D.,(ed.) (1989) “IERS Standards 1989,”IERS Technical Note 3, Observatorie de Paris, Paris, France.Google Scholar
  17. McCarthy, D. D.,(ed.) (1992) “IERS Standards 1992,”IERS Technical Note 13, Observatorie de Paris, Paris, France.Google Scholar
  18. Ray, Jim R. (April 1991) “Radio Interferometry,”Reviews of Geophysics, Supplement, pp 148–156.Google Scholar
  19. Robertson, Douglas S. (1987) “Radio Interferometry,”Reviews of Geophysics 25, pp 867–870.CrossRefGoogle Scholar
  20. Saastamoinen, J. (1972) “Atmospheric Correction for the Troposphere and Stratosphere in Radio Ranging of Satellites,” inThe Use of Artifical Satellites for Geodesy, Geodesy. Monogr. Ser. 15, (S.W. Henriksenet al., eds.), AGU, Washington, D.C., pp 247–251.Google Scholar
  21. Wahr, J.M. (1985) “Deformation Induced by Polar Motion,”J. Geophys. Res. 90, pp 9363–9368.CrossRefGoogle Scholar
  22. Ward, Steven N. (1988) “North American-Pacific Plate Boundary, an Elastic-Plastic Megashear: Evidence from Very Long Baseline Interferometry,”J. Geophys. Res. 93, pp 7716–7728.CrossRefGoogle Scholar
  23. Ward, Steven N. (1990) “Pacific-North American Plate Motions: New Results from Very Long Baseline Interferometry,”J. Geophys. Res. 95, pp 21965–21981.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • W. H. Dillinger
    • 1
  • M. D. Abell
    • 1
  1. 1.NOAA, Geosciences LaboratorySilver SpringUSA

Personalised recommendations