Fortune Telling Collection - Horoscope - Which is better, Beidou satellite navigation system or GPS?
Which is better, Beidou satellite navigation system or GPS?
1. Coverage: Beidou navigation system is a regional navigation system covering China, covering about 70- 140 east longitude and 5-55 north latitude. GPS is an all-weather navigation system covering the whole world, which can ensure that 6-9 satellites can be observed anywhere on the earth at any time.
2. Satellite number and orbital characteristics: Beidou navigation system sets two geosynchronous satellites on the equatorial plane of the earth, with an equatorial angular distance of about 60. GPS will set 24 satellites on six orbital planes, with an equatorial inclination of 55 and an equatorial angular distance of 60. The orbit of GPS navigation satellite is quasi-synchronous orbit, and it orbits the earth once 1 1 hour 58 minutes.
3. Positioning principle: Beidou navigation system is active two-way ranging two-dimensional navigation, and the ground center control system provides users with three-dimensional positioning data. GPS is passive pseudo-code one-way ranging three-dimensional navigation, and user equipment independently calculates its own three-dimensional positioning data. This working principle of Beidou navigation system brings two problems. First, users lose radio concealment while positioning, which is quite unfavorable in the military. On the other hand, because the equipment must include a transmitter, it is at a disadvantage in terms of volume, weight, price and power consumption.
Extended data:
On June 23rd, 2020, the last global networking satellite of Beidou-3 was launched in xichang satellite launch center. At 9: 43 on June 23rd, China successfully launched the 55th navigation satellite of Beidou system and the last global networking satellite of Beidou-3 in xichang satellite launch center by Long March 3B. At this point, the deployment of Beidou-3 global satellite navigation system constellation was fully completed six months ahead of schedule. ? On June 23rd, 2020, the last global networking satellite of Beidou-3 was launched in xichang satellite launch center.
Baidu encyclopedia -GPS
Baidu Encyclopedia-Beidou Satellite Navigation System
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