Accession Number : ADA184040

Title :   Research in Geodesy Based Upon Radio Interferometric Observations of GPS (Global Positioning System) Satellites.

Descriptive Note : Final rept. 5 Feb 82-31 Dec 85,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Counselman,Charles C , III

PDF Url : ADA184040

Report Date : 31 Dec 1986

Pagination or Media Count : 18

Abstract : MIT explored and extended the capabilities of the new technique of geodesy by radio interferometry using signals from the NAVSTAR Global Positioning System (GPS) satellites. Accuracy in the determination of long relative-position, or 'baseline', vectors between fixed points on the earth was improved by the use of doubly differenced, dual frequency (LI and L2 band). Carrier phase observations, and by determining the orbits of the satellites from observations at widely spaced sites whose relative positions were well known a priori from quasar observations. Accuracy of about 1 part in 10 million of the length of a long baseline, and 1 millimeter for a short baseline, was achieved. Keywords: Geodetic survey; Geodetic control; VLBI (Very Long Baseline Interferometry); Satellite geodesy; Satellite tracking; Satellite orbits; Orbit determination.

Descriptors :   *GEODESY, *GLOBAL POSITIONING SYSTEM, *RADIO INTERFEROMETRY, *NAVIGATION SATELLITES, ACCURACY, GEODETIC SURVEYS, DETERMINATION, ORBITS, GEODETIC SATELLITES, SATELLITE TRACKING SYSTEMS, DUAL MODE, FREQUENCY, CONTROL, BASE LINES, SHORT RANGE(DISTANCE), INTERFEROMETRY

Subject Categories : Geodesy
      Navigation and Guidance
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE