Since China's first man-made satellite was put into orbit in 1970, 30
different satellites have been launched, creating favorable conditions for the
space survey work of New China. In the early 1980s, some universities and
research institutions in China began to study GPS (Global Positioning System).
In the past 10 years, China has done a lot of work and accumulated a lot of
experience in the basic theoretical research and application development of GPS
surveying and mapping.
In the mid-1980s, China launched the first GPS receiver. Up to now, China
has thousands of GPS receivers. However, the application level of GPS in China
is still far from that in developed countries. The development of China's GPS
industry is restricted: backward, GPS receiver chips, China's semiconductor
industry mainly relies on imports for several problems, China has few monitoring
stations, communication equipment and technology are not up to standard, basic
geographic information is poorly updated, and it can not work well with the
electronic map of GPS.
Another important issue cannot be ignored. The United States has repeatedly
stressed that it will provide the world with GPS for free, but in fact, it has
taken some measures, namely, artificially destroying the accuracy of the signal
and increasing the error rate of the GPS signal, so other countries cannot
accurately obtain accurate data. Chinese scientists have established GPS
tracking stations in Beijing, Shanghai, Xi'an and other places to accurately
determine the orbit of GPS satellites, so as to make the data more accurate.
However, in the final analysis, we need to have our own global positioning
system. We need to research and develop our own satellites and receivers, so
that we can make full use of the global positioning system in our daily life
more effectively and create a more convenient and safe environment for our
people's travel and tourism.
In recent years, private cars in many cities in China, such as Shenzhen,
Guangzhou, Dongguan, etc., have been equipped with GPS monitoring systems, and
all tourist buses in Beijing have been equipped with GPS global positioning
systems. GPS is more closely related to our daily life.
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