Is China a Polaris system, a Beidou system, or both? Let s see more details

Both are Chinese, but there are certain differences between the two.

1. China's "Beidou" system belongs to the geostationary satellite positioning system.

Geostationary orbit satellite positioning system generally adopts active positioning, which is composed of two or three geostationary satellites, a central earth station and a mobile user terminal that are far away (the angle between the satellite and the geocentric connection line should be greater than 30°). When the position of the geostationary satellite is known, the elevation of the user is known, and the distance between 2 or 3 geostationary satellites and the user terminal can be measured, so that the mobile user terminal can be located according to the principle of determining the position according to the geometric three-dimensional coordinates. The positioning system composed of two geostationary satellites can only obtain the user's two-dimensional coordinates, so it is necessary to know the user's altitude elevation.

The positioning system composed of 3 geostationary satellites can directly obtain the user's 3D coordinates. The positioning accuracy error of the system is generally tens of meters, and the closer to the equator, the greater the error, up to more than 100 meters. For high-latitude areas where the elevation angle of the satellite is too small or in the non-coverage area of the satellite, the geostationary satellite positioning system cannot locate the satellite.

In the active positioning mode, the user terminal should have the ability to send and receive and respond. By measuring the time when the user's response signal returns through different satellites, the central station can find the three-dimensional spatial coordinates of the mobile user, and automatically give the longitude and latitude display, so as to realize the positioning of the central station to the user. This kind of system, usually while completing the positioning, also has a certain two-way data transmission function.

It is suitable for the scheduling of large-scale moving vehicles. Because of active targeting, the number of mobile users will be limited by the design capacity of the system.

2. The Polaris system is available in the database, see the link for details.

Since the Beidou system provided services, it has been widely used in transportation, agriculture, forestry and fishery, hydrological monitoring, meteorological monitoring and forecasting, communication time system, power dispatching, disaster relief and mitigation, public safety and other fields, and has been integrated into the national core infrastructure, producing significant economic and social benefits.

The Beidou system can provide high-precision positioning for many projects such as construction, excavation, roadbed, planning and design, physical exploration, etc., which can improve the productivity of engineering construction, and the efficiency is more than 3 times higher than that of traditional measurement methods.

The Beidou system can be positioned, can also be navigated, can also be used for large-scale engineering construction, the Beidou system is still very versatile, the positioning is very accurate, and the navigation is also very accurate.

There are always stars shining in the vast starry sky, and at the same time, some of them may be real stars, and some of them may just be artificial satellites. These artificial satellites were also developed by scientists with a lot of time, material and financial resources, and their development was also for the benefit of human life. To a certain extent, it has brought a lot of convenience to our lives, so many people will also express doubts, what is the difference between the Beidou navigation system and the Beidou positioning system?

Which one is more suitable for civilian use? Let's talk about it with you. <>

First of all, in terms of function, there is a big difference between the two. The main function of the Beidou satellite is navigation, so to a certain extent, we go to a strange environment, and if we don't know the way, we can navigate. It will give you a complete route to search and provide you with a lot of convenience.

The Beidou positioning system, its main function is to give you a real-time positioning, if you and your friends are in two unfamiliar environments. But the two of you don't know each other's directions, so you can use the positioning function at this time, and then at this time the real-time location will be sent to the other person. <>

Secondly, in contrast, the Beidou navigation system is more suitable for civilian use, because in our daily life, we may encounter a lot of unfamiliar environments, and we don't know what the road ahead is. At this time, navigation is a very necessary function, when we don't know what is going forward, we can open the navigation and provide us with a complete route. Therefore, Beidou navigation is more suitable for civilian use, and positioning, it can only provide a real-time positioning, and will not provide a complete route, so at this time it will also add some trouble, can not play a role in solving the problem.

All in all, the Beidou positioning system and the Beidou navigation system provide a lot of convenience for our lives to a certain extent. They are also a high-tech product developed by scientists, so to a certain extent, they are also for the benefit of our human life. I hope it will be helpful to you.

First of all, the Beidou satellite is the satellite that we often see in the news reports launched into space, it is the most important equipment to provide space geographical location, Beidou navigation is installed in a variety of equipment and instruments, including ships, aircraft, missiles, mobile phones, car navigation devices inside the chip, it is used to receive satellite signals to determine the precise latitude and longitude, altitude and other data of the navigation software. Beidou navigation is more suitable for the early use of rock sparrows.

The main function of the Beidou satellite is navigation, the main function of the Beidou satellite is navigation, in contrast, the Beidou navigation system is more suitable for civilian use, because in our daily life, we may encounter a lot of unfamiliar environment, and do not know how the road ahead is.

It has positioning and communication functions, and the coverage area is particularly large, there is no communication blind spot, and the anti-blocking ability is very strong.

It has a certain positioning function, and the coverage is very wide, and the data is very fine.

The difference between the Big Dipper and the North Star is as follows.

1. The number is different.

Polaris is the name of a star; The Big Dipper is composed of seven stars, named because the shape of the composition resembles a bucket, also known as the "Big Dipper".

2. The role is different.

The role of the North Star is to pinpoint the direction of due north; And the Big Dipper's limb spine is used to help find the North Star.

Polaris is an extension of the two stars connected below it, so it's easy to find.

3. The location is different.

The Big Dipper is part of the constellation Ursa Major, and graphically, the Big Dipper is located at the tail of Ursa Major; Among these seven stars, 6 are 2nd eeriform infiltration stars and 1 is a 3rd magnitude star, and through the connection of the two fierce or stars in the Doukou, it is extended about 5 times in the direction of the Doukou to find the North Star.

What is China's Beidou Satellite Navigation System? What are the shortcomings of it compared to GPS?

The Beidou copy system is divided into Beidou I.

No. and No. II. The Beidou-1 system has a total of 3 satellites, which have the functions of positioning and sending and receiving satellite short messages, but the positioning accuracy is very poor, and the system belongs to the test system.

The Beidou-2 system is a global satellite positioning system, planning to launch 35 satellites, and in 2012, the regional positioning system in the Asia-Pacific region has been built and opened to service. The positioning accuracy of BDS-2 is comparable to that of the current GPS, but it does not have the function of short messages.

China finally has its own satellite navigation system, and now it is popularized for civilian use, and I have a set of "Beidou Sea Chat" in my hand to send satellite text messages to friends for free. I don't usually feel much value, but the last time I played off-road, it was very useful, and the most important thing is that this thing can be communicated for free after purchase, so you don't have to worry about paying for it.

Beidou Satellite Navigation System.

It is a regional BAI active three-dimensional satellite DU positioning and communication system (ZhiCNSS) developed by China, and is the third mature satellite navigation system after the Global Positioning System (GPS) of the United States and the GLONASS of Russia. The Beidou Navigation Satellite System is committed to providing high-quality positioning, navigation and timing services to users around the world, and its construction and development follow the four principles of openness, autonomy, compatibility and progressiveness. I think it's GPS

It's a navigation system, just like the GPS in the United States.