title: Continuous time transfer using GPS carrier phase.
abstract: The Astronomical Institute of the University of Berne is hosting one of the Analysis Centers (AC) of the International GPS Service (IGS). A network of a few GPS stations in Europe and North America is routinely analyzed for time transfer purposes, using the carrier phase observations. This work is done in the framework of a joint project with the Swiss Federal Office of Metrology and Accreditation (METAS). The daily solutions are computed independently. The resulting time transfer series show jumps of up to 1 ns at the day boundaries. A method to concatenate the daily time transfer solutions to a continuous series was developed. A continuous time series is available for a time span of more than 4 mo. The results were compared with the time transfer results from other techniques such as two-way satellite time and frequency transfer. This concatenation improves the results obtained in a daily computing scheme because a continuous time series better reflects the characteristics of continuously working clocks.
authors.affiliation: Astronomical Institute, University Bern, Switzerland. dach@aiub.unibe.ch
authors.forename: Rolf
authors.initials: R
authors.lastname: Dach
authors.forename: Thomas
authors.initials: T
authors.lastname: Schildknecht
authors.forename: Tim
authors.initials: T
authors.lastname: Springer
authors.forename: Gregor
authors.initials: G
authors.lastname: Dudle
authors.forename: Leon
authors.initials: L
authors.lastname: Prost
mesh_terms: D002138:Calibration; D003198:Computer Simulation; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D005060:Europe; D005843:Geography; D007391:International Cooperation; D008962:Models, Theoretical; D009656:North America; D011846:Radio Waves; D017215:Satellite Communications / Q000295:instrumentation* / Q000592:standards*; D012680:Sensitivity and Specificity; D018531:Spacecraft; D013269:Stochastic Processes; D013997:Time Factors