China's Beidou-1 was built by several satellites.

Beidou-1 satellite positioning system consists of two satellites.

Beidou-1 satellite positioning system is independently developed by China, which provides users with all-weather and regional satellite positioning system by using geosynchronous satellites. It can quickly determine the geographical location of the target or user, and provide navigation information for users and competent departments. Beidou navigation system is a regional navigation system covering China. The coverage is about 70- 140 east longitude and 5-55 north latitude. Gps is an all-weather navigation system covering the whole world.

China successfully sent the third Beidou-1 navigation and positioning satellite into space. The first two Beidou-1 satellites were launched on June 3rd and February 2nd, 2000, respectively. The third satellite and the first two working stars of Beidou-1 form a complete satellite navigation and positioning system, which can ensure that satellite navigation information can be provided all day. The launch of the third Beidou satellite marks that China has become the third country in the world to establish a perfect satellite navigation system after the global navigation satellite system of the United States and the former Soviet Union.

Basic introduction of Beidou-1 satellite

Beidou navigation system is to set two geosynchronous satellites on the equatorial plane of the earth, and the equatorial angular distance of the satellites is 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 navigation satellite is in quasi-synchronous orbit, circling the earth once 1 1 hour for 58 minutes.

Beidou navigation system is an active two-way ranging two-dimensional navigation. The ground center control system solves the calculation of three-dimensional positioning data for users. Gps is passive pseudo-code one-way ranging three-dimensional navigation. Independently solved by the user equipment. This working principle of Beidou-1 brings two problems. One is that 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 and price.

The above contents refer to Baidu Encyclopedia-Beidou-1 satellite.