Accession Number : ADA434295


Title :   The Accuracy of Two-Way Satellite Time Transfer Calibrations


Descriptive Note : Conference paper


Corporate Author : NAVAL OBSERVATORY WASHINGTON DC


Personal Author(s) : Breakiron, Lee A ; Smith, Alan L ; Fonville, Blair C ; Powers, Edward ; Matsakis, Demetrios N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a434295.pdf


Report Date : Jan 2005


Pagination or Media Count : 11


Abstract : Results from successive calibrations of Two-Way Satellite Time and Frequency Transfer (TWSTFT) operational equipment at USNO and five remote stations using portable TWSTFT equipment are analyzed for internal and external errors, finding an average random error of 0.35 ns, an average type-B uncertainty of 0.15 ns, and an average total error of 0.38 ns for a single calibration measurement over time spans of up to 4.9 years. Closure discrepancies suggest that the operational apparatus is at least as good as the calibration equipment.


Descriptors :   *TIME INTERVALS , *TIME SERIES ANALYSIS , SYMPOSIA , TRANSFER , REMOTE AREAS


Subject Categories : Test Facilities, Equipment and Methods
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE