Which is better between Beidou Satellite Navigation System and GPS

1. Coverage: The Beidou Navigation System is a regional navigation system that covers the mainland of China, with a coverage range of approximately 70 ° -140 ° E longitude and 5 ° -55 ° N latitude. GPS is an all-weather navigation system that covers the globe, ensuring that 6-9 satellites can be observed simultaneously from any location and at any time on Earth.

2. Number of satellites and orbital characteristics: The Beidou Navigation System is equipped with two geostationary satellites on the Earth's equatorial plane, with an equatorial angular distance of approximately 60 ° between the satellites. GPS consists of 24 satellites placed on 6 orbital planes, with an equatorial inclination of 55 ° and an equatorial angular distance of 60 °. The GPS navigation satellite orbit is a quasi synchronous orbit, orbiting the Earth for 11 hours and 58 minutes.

3. Positioning principle: The Beidou Navigation System is an active two-way ranging two-dimensional navigation system, which is solved by the ground center control system and provides users with three-dimensional positioning data. GPS is a passive pseudocode one-way ranging 3D navigation system, where the user device independently calculates its own 3D positioning data. The working principle of the Beidou Navigation System brings two problems. Firstly, the user loses radio concealment while positioning, which is quite disadvantageous in military terms. Secondly, the equipment must include a transmitter, which puts it at a disadvantage in terms of size, weight, price, and power consumption.