Kalman smoothed estimates of GPS common-view data

Author

Jaldehag, Kenneth ; Johansson, Jan

Author_Institution

Nat. Testing & Res. Inst., Boras, Sweden

Volume

1

fYear

1999

fDate

1999

Firstpage

275

Abstract

A Kalman filter has been applied to two years of Global Positioning System (GPS) common-view data on a monthly basis for the time link between SP the Swedish National Testing and Research Institute, Sweden and the Observatoire de Paris, France. The Kalman estimates for the time link were compared to data extracted from the Circular T, issued by the Bureau International des Poids et Mesures (BIPM), France. The BIPM estimates are based on a Vondrak smoothing of the common-view data and values for the time link are available every fifth day, at standard dates. A third method, based on two-day averages around standard dates, was then compared to the above methods. It is shown that all three methods agree within 1 ns at standard dates, if the international GPS tracking schedule issued by the BIPM was routinely followed

Keywords

Global Positioning System; Kalman filters; smoothing methods; time measurement; transfer standards; BIPM; Circular T; France; GPS common-view data; Global Positioning System; Kalman filter; Kalman smoothed estimates; Sweden; Vondrak smoothing; international GPS tracking schedule; standard dates; time link; two-day averages; Clocks; Covariance matrix; Data mining; Gain measurement; Global Positioning System; Kalman filters; Noise measurement; Smoothing methods; System testing; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European

Conference_Location

Besancon

ISSN

1075-6787

Print_ISBN

0-7803-5400-1

Type

conf

DOI

10.1109/FREQ.1999.840760

Filename

840760