Accession Number : ADP009116

Title :   A Comparison of Several GPS Data Reduction Methods,

Corporate Author : NAVAL OBSERVATORY WASHINGTON DC

Personal Author(s) : Chadsey, H.

Report Date : 02 DEC 1993

Pagination or Media Count : 11

Abstract : For several years, discussions have been ongoing about how to analyze GPS time information in order to get the most accurate and precise time comparison between two locations. Many similar studies were done several years ago before the constellation was dominated by Block If satellites. With the Block II satellites and the use of Selective Availability (S/A), time comparisons have lost some precision and accuracy. This paper presents the results of research that was performed to find not only the best of several time comparison methods, but also to determine to what degree precision and accuracy have declined due to S/A.

Descriptors :   *COMPARISON, *GLOBAL POSITIONING SYSTEM, *TIME INTERVAL COUNTERS, ACCURACY, AVAILABILITY, PRECISION, TIME, NAVIGATION SATELLITES.

Subject Categories : Navigation and Guidance
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE