China s beidou navigation system bds has evolved from the demonstration navigation satellite system bds 1 to the regional navigation satellite system bds 2.
Beidou navigation satellite system pdf.
As a temporal spatial infrastructure of national significance the bds provides all time all weather and high accuracy positioning navigation.
The start epoch of bdt is 00 00 00 on january 1 2006 of coordinated universal time utc.
Pdf several noteworthy breakthroughs have been made with the beidou navigation satellite system bds and other global navigation satellite systems as.
Beidou navigation satellite system signal in space interface control document open service signal b2b beta version b2b 2019 12 2 sbas service the interface control documents are issued according to different signals.
The construction and development of beidou navigation satellite system bds is divided into three phases.
This document defines the characteristics of positioning navigation and timing services.
Now the global beidou navigation system bds 3 is in construction and is proceeding well.
The beidou navigation satellite system time bdt is adopted by the bds as time reference.
The beidou navigation satellite system bds has been independently constructed and operated by china with an eye on the needs of the country s national security and economic and social development.
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Completion and commissioning of the beidou navigation satellite system bds 3 on august 3 2020 a news conference was held at the state council information office for announcing that the bds 3 was formally commissioned.
This document defines the characteristics of the bds precise point positioning ppp service signal ppp b2b.
Global beidou navigation system.
Bds 1 bds 2 and bds 3 in sequence.
The successful launch of beidou 1c also meant the establishment of the beidou 1 navigation system.
This document is a upgraded version of beidou navigation satellite system signal in space interface control document open service signal version 2 1 and.
China satellite navigation office 2020 2 bds sis icd ppp b2b 1 0 2020 07 2 scope the construction and development of the beidou navigation satellite system is divided into three phases.
Bds 1 bds 2 and bds 3 in sequence.
Bdt adopts the international system of units si second as the base unit and accumulates continuously without leap seconds.
The third satellite beidou 1c a backup satellite was put into orbit on 25 may 2003.
The design and functions of bds 3 are quite different from those of both bds 1.