1. Formed a satellite
Beidou Positioning: The space section of the Beidou satellite navigation
system consists of 5 static orbital satellites and 30 non -static track
satellites. China plans to cover the Asia -Pacific region around 2012, covering
the world around 2020. 16 Beidou navigation satellites have been successfully
launched.
GPS: GPS is composed of 24 satellites (21 working satellites; 3 spare
satellites). It is located above 20200km from the surface of the ground with a
operating cycle of 12h. The satellites are evenly distributed on the 6 rail
surfaces (4 per track surface), and the orbital angle is 55 °. The distribution
of satellites allows more than 4 satellites to be observed anywhere and time
around the world, and can be pre -stored in satellites.
Second, coverage
Beidou Positioning: Beidou Navigation System is a regional navigation
system covering China. It covers a scope of about 70 ° ~ 140 ° east and 5 ° ~ 55
° north latitude. The Beidou Satellite System has achieved full coverage of
Southeast Asia.
GPS: The global all -weather navigation system. It can ensure that 6-9
satellites can be observed at any place and time on the earth (in fact, at most
11).
3. Positioning accuracy
Beidou Positioning: The accuracy of the civil service of the "Beidou"
positioning system has reached 10 meters, and the positioning accuracy of the
new generation of navigation chips can reach 2.5 meters. The area with poor
satellite distribution, poor positioning accuracy or unable to locate.
GPS: The accuracy of stand -alone navigation has been achieved by about 10
meters. If comprehensive positioning, the accuracy can reach centimeter and
millimeter. However, the accuracy of openness in the civilian field is about 10
meters.
Fourth, the main function
BDS: Quick positioning, providing users in the service area with all
-weather and real -time positioning services. The accuracy of positioning is
equivalent to GPS. SMS communication can transmit up to 120 Chinese characters
at a time. Essence
GPS: A comprehensive, all -weather, full -time, high -accuracy satellite
navigation system, providing global users with low -cost, high accuracy three
-dimensional positions, speed, and accurate timing of navigation
information.
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