Other
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340..187m&link_type=abstract
In ESA, Frequency and Time Forum p 187-190 (SEE N93-24978 09-70)
Other
Accuracy, Frequency Measurement, Loran C, Radio Navigation, Radio Transmission, Time Measurement, Atomic Clocks, Communication Networks, Global Positioning System, Metrology, Time
Scientific paper
The phases of transmissions from Norwegian Sea Loran Sylt and Soviet Radionavigation System (RNS) Bryansk stations were measured at MTI (Metrology National Time and Frequency Laboratory) (Finland) and SNT (Swedish National Time and Frequency Laboratory) (Sweden) daily for two years to find out the uncertainty of time scales based on them. The phases were traced back to UTC by using BIPM time circulars and appropriate time information letters for other laboratories. The reference time scale at MTI is a GPS receiver. The reference time scale at SNT is based on one of three Cs clocks which contribute to UTC. The results show that by common view Sylt measurements, a Loran C based time scale can be maintained at 100 ns level/10 days. By using RNS common view measurements, a time scale at about 500 ns/10 day level is achievable.
Kalliomaeki Kalevi
Mansten Tapio
Selin Bengt
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