DEVELOPMENT AND PROGRESS IN GNSS
Chen Junyong; Dang Yaming ;and Cheng Pengfei
State Bureau of Surveying & Mapping,Beijing 100830
Abstract Overview of the progress in GNSS, the modernization of GPS, recent situation of GLONASS and the development of GALILEO are presented. Comment on the nuisance effects in GNSS, such as ionospheric and tropospheric propagation delay, multipath mitigation, receiver and satellite antenna phase centre variation, carrier phase ambiguity term are made, and how to reduce these effects is introduced.
Key words ：
GNSS
GPS
GLONASS
GALILEO
PPP(Precise Point Positioning)
Received: 01 January 1900
Corresponding Authors:
Chun Junyong
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