Skip to main content Accessibility help
×
Home

Recent Results of Radio Interferometric Determinations of a Transcontinental Baseline, Polar Motion, and Earth Rotation

  • D. S. Robertson (a1), W. E. Carter (a1), B. E. Corey (a2), W. D. Cotton (a2), C. C. Counselman (a2), I. I. Shapiro (a2), J. J. Wittels (a2), H. F. Hinteregger (a3), C. A. Knight (a3), A. E. E. Rogers (a3), A. R. Whitney (a3), J. W. Ryan (a4), T. A. Clark (a4), R. J. Coates (a4), C. Ma (a5) and J. M. Moran (a6)...

Abstract

Radio interferometric observations of extragalactic radio sources have been made with antennas at the Haystack Observatory in Massachusetts and the Owens Valley Radio Observatory in California during fourteen separate experiments distributed between September 1976 and May 1978. The components of the baseline vector and the coordinates of the sources were estimated from the data from each experiment separately. The root-weighted-mean-square scatter about the weighted mean (“repeatability”) of the estimates of the length of the 3900 km baseline was approximately 7 cm, and of the source coordinates, approximately or less, except for the declinations of low-declination sources. With the source coordinates all held fixed at the best available, a posteriori, values, and the analyses repeated for each experiment, the repeatability obtained for the estimate of baseline length was 4 cm. From analyses of the data from several experiments simultaneously, estimates were obtained of changes in the x component of pole position and in the Earth's rotation (UT1). Comparison with the corresponding results obtained by the Bureau International de l'Heure (BIH) discloses systematic differences. In particular, the trends in the radio interferometric determinations of the changes in pole position agree more closely with those from the International Polar Motion Service (IPMS) and from the Doppler observations of satellites than with those from the BIH.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Recent Results of Radio Interferometric Determinations of a Transcontinental Baseline, Polar Motion, and Earth Rotation
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Recent Results of Radio Interferometric Determinations of a Transcontinental Baseline, Polar Motion, and Earth Rotation
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Recent Results of Radio Interferometric Determinations of a Transcontinental Baseline, Polar Motion, and Earth Rotation
      Available formats
      ×

Copyright

References

Hide All
Carter, W. E., Robertson, D. S., and Abell, M. D.: 1979, this volume.
Clark, T. A., Hutton, L. K., Marandino, G. E., Counselman, C. C. III, Robertson, D. S., Shapiro, I. I., Wittels, J. J., Hinteregger, H. F., Knight, C. A., Rogers, A. E. E., Whitney, A. R., Niell, A. E., Ronnang, B. O., and Rydbeck, O. E. H.: 1976, Astron. J. 81, pp. 599603.
Guinot, B.: 1970, Astron. Astrophys. 8, pp. 2628.
Guinot, B.: 1974, Astron. Astrophys. 36, pp. 14.
King, R. W., Counselman, C. C. III, and Shapiro, I. I.: 1978, J. Geophys. Res. 83, pp. 33773381.
Lieske, J. H., Lederle, T., Fricke, W., and Morando, B.: 1977, Astron. Astrophys. 58, pp. 116.
Melchior, P.: 1971, Celes. Mech. 4, pp. 190212.
Robertson, D. S.: 1975, , M.I.T.
Shapiro, I. I., Robertson, D. S., Knight, C. A., Counselman, C. C., Rogers, A. E. E., Hinteregger, H. F., Lippincott, S., Whitney, A. R., Clark, T. A., Niell, A. E., Spitzmesser, D. J.: 1974, Science 186, pp. 920922.
Stolz, A., Bender, P. L., Faller, J. E., Silverberg, E. C., Mulholland, J. D., Shelus, P. J., Williams, J. G., Carter, W. E., Currie, D. G., and Kaula, W. M.: 1976, Science 193, pp. 997999.
Woolard, E. W.: 1953, Astron. Papers of the Amer. Eph. 15, part 1.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed