BeiDou and Galileo, Two Global Satellite Navigation Systems in Final Phase of the Construction, Visibility and Geometry

• Autorzy: Januszewski J.

Identyfikatory

DOI

10.12716/1001.10.03.01

• Języki publikacji: EN

Abstrakty

EN

Spatial segment is one of three segments of each satellite navigation systems (SNS). Nowadays two SNSs, GPS and GLONASS, are fully operational, two next SNSs, BeiDou in China and Galileo in Europe, are in final phase of the construction. In the case of China system this segment will consist of 35 satellites with three types of orbits ? medium (MEO), geostationary (GEO) and inclined geosynchronous (IGSO). As GEO and IGSO satellites can be used in China and Asia-Pacific region only, BeiDou MEO constellation with 27 fully operational satellites will be taken into account in this paper. The orbital planes of the Galileo constellation will be divided in “slots” that contains at least one operational satellite. The Galileo reference constellation has 24 nominal orbital positions or operational slots in MEO homogeneously distributed in 3 orbital planes; i.e. 8 slots equally spaced per plane. As the error of user’s position obtained from both systems depends on geometry factor DOP (Dilution Of Precision) among other things the knowledge of the number of satellites visible by the user above given masking elevation angle Hmin and the distributions of DOP coefficient values, GDOP in particular, is very important. The lowest and the greatest number of satellites visible in open area by the observer at different latitudes for different Hmin, the percentage of satellites visible above angle H, distributions (in per cent) of satellites azimuths and GDOP coefficient values for different Hmin for BeiDou and Galileo systems at different latitudes are presented in the paper.

Słowa kluczowe

EN

Global Navigation Satellite System (GNSS); BeiDou; Galileo; GNSS construction; GNSS geometry; GNSS visibility; Global Positioning System (GPS); Dilution of Precision (DOP)

• Wydawca: Faculty of Navigation, Gdynia Maritime University
• Czasopismo: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
• Rocznik: 2016
• Tom: Vol. 10, no. 3
• Strony: 381--387
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Januszewski J.

• Gdynia Maritime University, Gdynia, Poland

Bibliografia

• 1 BeiDou Navigation Satellite System, Signal in Space Interface Control Document Open Service Signal (Version 2.0), China Satellite Navigation Office, December 2013
• 2 BeiDou Navigation Satellite System, Open service, Performance Standard (Version 1.0), China Satellite Navigation Office, December 2013
• 3 Beitz J. W. 2016. Engineering Satellite‐Based Navigation and Timing Global Navigation Satellite Systems, Signals, and Receivers. John Wiley & Sons, Inc., Hoboken, New Jersey
• 4 European GNSS Service Centre, Constellation Information, 2016
• 5 Januszewski J. 2010. Systemy satelitarne GSP, Galileo i inne. Warszawa: PWN, (in polish)
• 6 Martin H. 2013. U.S. Space‐Based Positioning, Navigation and Timing policy and Program Update. 8th International Committee on GNSS, Dubai
• 7 Munich Satellite Navigation Summit, Munich, 2016
• 8 Report on the Development of BeiDou Navigation Satellite System (version 2.2) 2013. China Satellite Navigation Office
• 9 www.beidou.gov.cn
• 10 www.directory.eoportal.org
• 11 www.gpsworld.com
• 12 www.gsc.europa.eu
• 13 www.imo.org
• 14 www.insidegnss.com
• 15 www.isg.org

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.