A Comparison of the Highest Precision Commonly Available Time Transfer Methods: TWSTT and GPS CV

Abstract

The U.S. Naval Observatory (USNO) in Washington, D.C., is now operating its Alternate Master Clock (AMC), located at Falcon Air Force Base, Colorado. UTC(USNO)-UTC(AMC) is determined independently by the Global Positioning System (GPS) common view (CV) and the Two-Way Satellite Time Transfer (TWSTT) method. The GPS CV time transfer data are joined from strict 13- minute common-view tracks. The TWSTT data are single 5-minute runs taken once every hour. In this study, the performances of the GPS CV time transfers from Standard Positioning Service (SPS) CIA code single-channel receivers using the modeled ionosphere, Precise Positioning Service (PPS) dual-frequency receivers using the measured ionosphere, and TWSTT are compared.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1996
Accession Number
ADA509564

Entities

People

  • Angela D. Mckinley
  • Francine Vannicola
  • James A. Deyoung

Organizations

  • United States Naval Observatory

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Artificial Satellites
  • Atomic Beam Masers
  • Clocks
  • Frequency
  • Frequency Domain
  • Global Positioning Systems
  • Information Operations
  • Kalman Filters
  • Ku Band
  • Operating Systems
  • Precision
  • Prototypes
  • Reliability
  • Scheduling (Production)
  • Time Intervals

Readers

  • Aerospace logistics and air mobility.
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space