Accession Number:

ADA059480

Title:

Determining Coordinates of the Rotational Pole Using Satellite Data from Four Sites,

Descriptive Note:

Corporate Author:

JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB

Personal Author(s):

Report Date:

1978-07-01

Pagination or Media Count:

27.0

Abstract:

This study investigates how precisely the terrestrial coordinates of the rotational pole can be determined from satellite data from four sites in the U.S. The five satellites used are those of the Navy Navigation Satellite System TRANSIT. Tracking data for these satellites are Doppler observations from sites in Maine, Minnesota, California, and Hawaii. The data used in the study are intermediate data products of the near-real-time orbit determination procedure, which is an integral part of the navigation system operations. Six five-day intervals were selected for study, one every other month during 1976. Coordinates were determined daily from five satellites. Five-day averages were used as final coordinates. Comparisons were made with extrapolated and final coordinates from the Bureau International de lHeure BIH and final coordinates from the Doppler Polar Motion Service DPMS. The final coordinates determined in the study agree as well with the final values of BIH as do the results of DPMS. The study implies that low-cost and near-real-time estimates of the terrestrial coordinates of the pole can be made available daily as a by-product of the routine support needed for the Navy Navigation Satellite System. Author

Subject Categories:

  • Geodesy
  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE