What is the difference between BeiDou satellite and GPS system?
1, the number of satellites is different
BDS: BeiDou satellite navigation system space segment consists of 5 geostationary orbit satellites and 30 non-geostationary orbit satellites, China plans to around 2012,; BeiDou: the system will cover the Asia-Pacific region, around 2020 to cover the world.
GPS: GPS is composed of 24 satellites (21 working satellites; 3 standby satellites), which are located 20200km above the earth's surface, with an operational period of 12h. The satellites are uniformly distributed on 6 orbital planes (4 satellites on each orbital plane), and the orbit inclination is 55°. The distribution of satellites makes it possible to observe more than 4 satellites anywhere in the world and at any time, and to pre-store navigation letters in the satellites.
2、Different coverage
BDS: BeiDou navigation system is a regional navigation system covering China's mainland, covering about 70°~140° east longitude and 5°~55° north latitude. BeiDou satellite system has realized full coverage of Southeast Asia.
GPS: An all-weather navigation system covering the whole world. It is able to ensure that 6-9 satellites (actually up to 11) can be observed simultaneously at any location on Earth at any time.
3. In terms of positioning accuracy
At present, the three-dimensional positioning accuracy of BeiDou Navigation System is about 25m, and the timing accuracy is 100ns, and it can reach 10m in some major areas in China.
GPS three-dimensional positioning accuracy of P code has been improved from 16m to 6m, and C/A code has been improved from 25-100m to 12m, and timing accuracy is about 20ns; the accuracy of stand-alone navigation has been realized to be about 10m, and the accuracy can be up to centimetre and millimetre if integrated positioning is carried out. However, the accuracy of the civil field is about 10 meters.
Advantages and Disadvantages
BDS: BeiDou has the communication and target positioning that GPS does not have, GPS can only tell the user "where I am", but BeiDou system can not only tell the user "where I am", but also tell the user "where my friends are", but also tell the user "where my friends are". But BeiDou system can not only tell the user "where I am", but also tell the user "where my friends are", which is mainly used in military, the civil promotion has not been fully popularized, and the cost of the chip is high, in the middle and high latitude areas, due to the BeiDou visible satellite number is less, the satellite distribution is poor, the positioning accuracy is poor or can not be positioned.
Ltd. specializes in high-precision GNSS modules and wireless communication products, technology development and application promotion service providers, relying on the wireless communication technology in the field of R & D and promotion of experience, JUNODA has established a rich experience in hardware and software development of the technical team, aimed at domestic and foreign OEM / ODM customers and system integrators to provide high-quality, high-performance wireless modules and application solutions, and is committed to creating long-term customer satisfaction. We aim to provide high-quality, high-performance wireless modules and application programs to OEM/ODM customers and system integrators at home and abroad, and create long-term value for customers!
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