| Attributes | Values |
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| rdf:type
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| Description
| - EGNOS (European Geostationary Navigation Overlay Service) is the European satellite navigation system which augments GPS and makes it suitable for safety critical applications. It is one of the Satellite Based Augmentation Systems (SBAS). It uses three geostationary satellites transmitting signals in the GPS L1 frequency channel These signals are almost identical to the GPS signal and thus can be used for time transfer in the same way. Since the geostationary satellites move slightly and very slowly towards the user, one can assume that some of the measurement errors (e.g. multipath, atmospheric delay) will also show small and slow variation compared to GPS measurements and better performance of the time and frequency transfer can be expected. We therefore performed an experimental measurement in order to verify that the fluctuations in measured delay of the received signal caused by multipath are really much slower compared with using GPS and the time transfer can be improved by using EGNOS. We applied the same time reference to a pair of GTRSO receivers and performed the time comparison against one of the EGNOS satellites. Antennas with hemispheric directional characteristics were used. The distance between the antennas was 5.5m. From the continuous several-day measurement, we observed that the code measurement has markedly lower accuracy compared to the signal from GPS (10 ns standard deviation). This is caused by the narrow bandwidth of the transmitted signal which is only 2.2 MHz in the case of EGNOS. We confirmed that the fluctuations caused by multipath are very slow but with relatively higher amplitude. On the other hand, the results obtained from the carrier phase measurements are promising. The standard deviation from the whole measurement was 12 ps. Together with the white phase noise we observed small diurnal fluctuations in the measured time delay caused by daily variations in temperature of the antennas and antenna cables.
- EGNOS (European Geostationary Navigation Overlay Service) is the European satellite navigation system which augments GPS and makes it suitable for safety critical applications. It is one of the Satellite Based Augmentation Systems (SBAS). It uses three geostationary satellites transmitting signals in the GPS L1 frequency channel These signals are almost identical to the GPS signal and thus can be used for time transfer in the same way. Since the geostationary satellites move slightly and very slowly towards the user, one can assume that some of the measurement errors (e.g. multipath, atmospheric delay) will also show small and slow variation compared to GPS measurements and better performance of the time and frequency transfer can be expected. We therefore performed an experimental measurement in order to verify that the fluctuations in measured delay of the received signal caused by multipath are really much slower compared with using GPS and the time transfer can be improved by using EGNOS. We applied the same time reference to a pair of GTRSO receivers and performed the time comparison against one of the EGNOS satellites. Antennas with hemispheric directional characteristics were used. The distance between the antennas was 5.5m. From the continuous several-day measurement, we observed that the code measurement has markedly lower accuracy compared to the signal from GPS (10 ns standard deviation). This is caused by the narrow bandwidth of the transmitted signal which is only 2.2 MHz in the case of EGNOS. We confirmed that the fluctuations caused by multipath are very slow but with relatively higher amplitude. On the other hand, the results obtained from the carrier phase measurements are promising. The standard deviation from the whole measurement was 12 ps. Together with the white phase noise we observed small diurnal fluctuations in the measured time delay caused by daily variations in temperature of the antennas and antenna cables. (en)
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| Title
| - Time and frequency transfer using EGNOS satellite system
- Time and frequency transfer using EGNOS satellite system (en)
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| skos:prefLabel
| - Time and frequency transfer using EGNOS satellite system
- Time and frequency transfer using EGNOS satellite system (en)
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| skos:notation
| - RIV/67985882:_____/13:00437405!RIV15-AV0-67985882
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/67985882:_____/13:00437405
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Geostationary satellites; Statistics; Phase measurement (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - 43rd Annual Precise Time and Time Interval Systems and Applications Meeting 2011
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...iv/tvurceVysledku
| - Pánek, Petr
- Kuna, Alexander
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| http://linked.open...n/vavai/riv/zamer
| |
| number of pages
| |
| http://purl.org/ne...btex#hasPublisher
| |
| https://schema.org/isbn
| |
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