What is BeiDou Navigation Satellite System?

The Beidou Navigation System is a global satellite navigation system developed by China itself, and is the third mature satellite navigation system after the GPS system of the United States and the GLONASS system of Russia. The system consists of three parts: space satellite, ground central station and user terminal, and its coverage includes Chinese mainland and its coast, Taiwan, Nansha and other islands and reefs, the Sea of Japan, parts of the Pacific Ocean and some surrounding areas.

The Beidou Navigation Satellite System can provide all-weather, high-precision, and large-scale real-time positioning services for users in the service area, and its positioning accuracy is generally tens of meters. If differential positioning technology is adopted, the positioning accuracy of key areas can reach within 10 m, and the speed measurement accuracy is better than M s, which is basically close to the positioning level of the GPS system in the United States.

The Beidou system has powerful functions such as navigation, positioning, timing, communication and data transmission. It can provide global users with seven services, including positioning, navigation timing, global SMS communication, regional SMS communication, international search and rescue, satellite-based augmentation, ground-based augmentation, and accurate single-point positioning. It is a powerful global satellite navigation system.

Short message communication service is the unique function of the Beidou system. The short message function is a unique technological breakthrough of Beidou, which is not available in GPS systems. The so-called short message refers to the direct two-way transmission of information between the satellite positioning terminal and the Beidou satellite or the Beidou ground service station through satellite signals.

In terms of function, other satellite navigation systems can only be passively positioned, so users can only know "I am **". And Beidou users not only know how to change the paragraph and say that I am in **, but also tell others what I am doing in **. The Beidou system has created a unique integrated service model of communication and navigation, and is a veritable "generalist" Beidou-3 global system, on the basis of full compatibility with the Beidou-2 short message communication service, can provide global short message communication services and regional short message communication services.

Among them, the global SMS communication service can design and activate SMS communication services for authorized users around the world, supporting 560 bits (40 Chinese characters) at a time; The regional SMS communication service can provide regional SMS communication services for users in China and surrounding areas, supporting the increase in the number of users from the original 500,000 to 12 million, and the sending capacity from the original 120 Chinese characters to 1,000 Chinese characters, which can not only transmit text, but also transmit voice and **.

Since 2012, the Beidou Navigation Satellite System has officially provided regional services and has become one of the four major service providers of the international satellite navigation system. With the gradual increase in the number of satellites and the ground-based augmentation system, the positioning capability of the Beidou navigation system has increased from the previous 10 meters to 5 meters to the centimeter level.

Unmanned

I said that the steamed bread or bread I ate in the morning was related to Beidou, and many people wondered that it had nothing to do with the fact that the Beidou satellite could not be beaten with eight poles. In fact, if you don't regret it, Beidou is by our side and serves all aspects of our lives. Maybe the steamed buns or bread you eat in the morning are made from wheat harvested by unmanned harvesters.

As the temperature gradually warms up, the towns and villages of Yache County, Kashgar Prefecture, Xinjiang, seize the favorable opportunity for the temperature to rise and the soil moisture is good to sow cotton, and the fields are busy. In the cotton field of Tuanjie Village, Bagawati Township, Yarkand County, the villagers used the new Beidou navigation automatic driving system seeder to achieve unmanned driving, and adopted the method of dry sowing and wet discharge to lay drip irrigation, film laying, sowing and other operations, which further promoted the pace of agricultural modernization and realized the transformation of water use from extensive and inefficient to intensive and efficient.

The application of Beidou satellite navigation technology in agricultural machinery has not only brought benefits to agricultural machinery owners, but also brought tangible benefits to the majority of villagers.

Navigation and positioning

Had breakfast and went to work. Some people will choose to share bicycles, and shared bicycles use the North Lap Bucket, which provides sub-meter and decimeter high accuracy through Beidou foundation enhancement, and can accurately report the location to cyclists. Even in places where signals are blocked, such as under viaducts, between buildings, and under the shade of trees, the positioning of the shared bicycle will not be misplaced.

Taking the bus also has something to do with Beidou. Shanghai has integrated the high-precision of Beidou satellite navigation in the field of ground public transportation, which can make the real-time forecast accuracy of public transportation reach 95%. When driving, navigation software can help us choose the best route.

The map app in the mobile phone uses the location information provided by the Beidou satellite. When you get home from work, you don't want to cook after a tired day, so order a takeout, which also uses the Beidou system. With the Beidou positioning function, the Dazheng takeaway brother knows to pick up the food and deliver it, and you also know that the takeaway brother is at the moment, and when it will be delivered.

There is also the protection of wildlife. Using the Beidou system to equip protected animals with positioning collars can help people master their habits.

In short, Beidou has been integrated into our lives and has become an indispensable part of our lives.