Skip to main content Accessibility help
×
Home

IGS Combined and Contributed Earth Rotation Parameter Solutions

  • Jan Kouba (a1), Gerhard Beutler (a2) and Markus Rothacher (a2)

Abstract

Since January 1995 the International GPS Service (IGS) has been combining and analyzing daily polar motion (PM) series, produced and submitted by seven IGS analysis centers (ACs) for the IGS Final orbit/clock combinations. Since June 30, 1996 the IGS Earth Rotation Parameter (ERP) series that accompany the IGS combined orbits, also include combined PM rates. Furthermore, since March 1997, the IGS LOD (Length of Day) solutions are based on separate combinations of AC LOD solutions calibrated and weighted according to the IERS Bulletin A definite values. Similar to AC orbit solutions, the PM solutions have improved considerably since 1995, so that currently the IGS combined and the best AC PM solutions are at or below the 0.1 mas precision level, although PM biases may exceed .1 mas. Comparisons of AC ERP and PM rate solutions with the IGS Final combined ERP series revealed signals with 7 and 14-day periods for some AC solutions.

During 1998, the IGS Final and the best AC PM rate solutions compared with Atmospheric Angular Momentum (AAM) at 0.3 mas/day (rms) with an average correlation of about 0.8 and 0.6 for the PM x and PM y rate components. The correlation varied considerably with time and frequency, though significant correlation already started from 6-day periods and reaching maxima within 10 to 50 day period bands. Most of the remaining signal in the PM rate solutions could likely be accounted for by Ocean Angular Momentum (OAM) as seen from the comparisons of combined OAM and AAM with the IGS PM series during 1995 and early 1996 when also OAM data were made available. During this period the IGS PM rates agreed with the combined OAM + AAM series with 0.3 and 0.2 mas/day (rms) for the PM x and y components and with an average correlation of about 0.8 for both PM components.

    • 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.

      IGS Combined and Contributed Earth Rotation Parameter Solutions
      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.

      IGS Combined and Contributed Earth Rotation Parameter Solutions
      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.

      IGS Combined and Contributed Earth Rotation Parameter Solutions
      Available formats
      ×

Copyright

References

Hide All
Barnes, R.T.H., Hide, R., S., F.R., White, A.A. and Wilson, C.A., 1983, Proc. R. Soc. Lona., Ser. A, 387, pp. 3173.
Beutler, G., Rothacher, M., Springer, T., Kouba, J. and Neilan, R.E., 1998, 32nd COSPAR Scientific Assembly, Nagoya, Japan, Julyl2, in Advances in Space Research (in press).
Beutler, G., 1997, Rotation der Erde: Theorie, Methoden, Resultate aus Satel-litengeodsie und Astrometrie, Astronomisches Institut der Universitt Bern.
Beutler, G., Kouba, J. and Springer, T., 1995, Bull. Geod. 69, pp. 200222.
Boucher, C., Altamimi, Z. and Silliard, P., 1998, IERS Technical Note No. 24, Central Bureau of IERS, Observatory of Paris, France, May.
Chao, F.B. and Gross, R.S., 1995, Geophys. J. Int., 122, 776783.
Clark, T.A., Ma, C., Ryan, J.W., Chao, B.F., Gipson, J.M., MacMillan, D.S., Vandenberg, N.R., Eubanks, T.M., and Neill, A.E., 1998, EOS, 79, April 28, 205/209.
Dickey, J.O., Marcus, S.L. Hide, R., Eubanks, T.M. and Boggs, D.H., 1994, J. Geophys. Res., 99, pp 2392123937.
Eubanks, T.M. Steppe, J.A. and Dickey, J.O., 1988, The Earth’s Rotational and Reference Frames for Geodesy and Geodynamics, pp. 365371.
Herring, T.A. and Dong, D., 1994, J. Geophys. Res., 99, pp 1805118071.
International Earth Rotation Service, 1996, 1995 IERS Annual Report, Observatoire de Paris.
International Earth Rotation Service, 1997, 1996 IERS Annual Report, Observatoire de Paris.
Kołaczek, B., Nuzhdina, M., Nastula, J. and Kosek, W., 1999, IERS Technical Note 26, Observatoire de Paris.
Kouba, J., 1999. IGS 1998 Annual Report, pp.1317.
Kouba, J. 1996, 1996 IGS Analysis Center Workshop Proceedings, Silver Spring, MD, USA, March 19-21, pp. 3342.
Kouba, J. and Mireault, Y., 1996, IGS 1995 Annual Report, pp. 4576.
Kouba, J. and Mireault, Y., 1997, IGS 1996 Annual Report, pp. 55100.
Kouba, J., Mireault, Y., Beutler, G., Springer, T. and Gendt, G., 1998, GPS Solutions, 2, pp. 315.
Langely, R.B., King, R.E., Shapiro, I.I. Rosen, R.D. and Salstein, D.A., 1981, Nature, Lond. 294, pp. 730732.
Marshall, J., Hill, C., Perelman, L., and Hesley, C.A., 1997, J. Geophys. Res., 102, 57335766.
McCarthy, D.D., 1996, IERS Technical Note 21. Observatoire de Paris.
Mireault, Y., Kouba, J. and Ray, J.R., 1997, EOS Trans. AGU, 78(17), Spring Meeting Suppl., S109.
Mireault, Y., Kouba, J. and Ray, J.R.. 1999, GPS Solutions (in press).
Ponte, R.M. 1997, Geophys., J. Int., I30, 469474.
Ponte, R.M., Stammer, D., Marshall, J., 1998, Nature, 391, Jan. 29, pp. 476479.
Ray, R.D., Steinberg, , Chao, B.F. and Cartwright, D.E., 1994, Science, 264, pp.830832.
Rosen, R.D. and Salstein, D.A., 1985, J. Geoghys. Res., 90, 80338041.
Rosen, R.D. and Salstein, D.A., 1990, J.Geoghys. Res., 95, 265279.
Rosen, R.D. and Salstein, D.A, 1991, Geoghys. Res. Lett., 18, 19251926.
Rothacher, M., Beutler, G., Herring, T.A., Weber, R., 1999, J. Geophys. Res. (in press).
Salstein, D.A. and Rosen, R.D., 1997, 7th Conf. On Climate Variations, American Meteorological Society, Boston, MA, pp. 344348.
Salstein, D.A., Kann, D.M., Miller, A.J. and Rosen, R.D., 1993, Bulletin American Meteorological Society, 71, pp. 6780.
Schaer, S., 1999, PhD Thesis, Astr. Institute of Univ. Berne, Switzerland, March.
Springer, T.A. and Beutler, G., 1993, 1993 IGS Analysis Center Workshop Proceedings, Astr. Institute University of Berne, March 25-26, pp. 242249.

Related content

Powered by UNSILO

IGS Combined and Contributed Earth Rotation Parameter Solutions

  • Jan Kouba (a1), Gerhard Beutler (a2) and Markus Rothacher (a2)

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.