Accession Number:

ADA110765

Title:

A Comparison of Pole Positions Derived from GPS Satellite and Navy Navigation Satellite Observations,

Descriptive Note:

Corporate Author:

DEFENSE MAPPING AGENCY HYDROGRAPHIC/ TOPOGRAPHIC CENTER WASHINGTON DC

Personal Author(s):

Report Date:

1982-01-06

Pagination or Media Count:

18.0

Abstract:

The observation of the motion of the Earths spin axis with respect to the crust has been done continuously sincce the latter part of 1899 by the International Service. With the advent of new technologies, new determinations of polar motion have been possible. Doppler tracking of the Navy Navigation Satellites has provided estimates of the polar motion on a permanent basis since 1969. Currently, these estimates are done at the Defense Mapping Agency and are distributed to several agencies including the Bureau International de lHeure BIH, which has the responsibility of centralizing polar motion data. The NAVSTAR Global Positioning System GPS is a new navigation satellite system which will eventually replace the existing Navy Navigation Satellite System. As a byproduct of the orbit estimation process for the GPS satellites, values for the position of the pole are determined. In this paper the two different methods for computing the poles position from satellite observations are described. The most recent results from each method are compared to each other and to the standard BIH values. Author

Subject Categories:

  • Geodesy
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE