When talking about autonomous driving, we are not talking about an independent individual, but a complete technical matrix. In this technical matrix, in addition to radar sensors and algorithms, there is a technology we are very familiar with - GPS. Its existence ensures that the self-driving car is driving on the road that should be driven, rather than being chaotic like a headless fly.
We are almost familiar with GPS, and almost started with the phone, this feature began to accompany us. But to a certain extent, we are very strange to this technology, except that it knows that GPS is used for real-time positioning, and it knows nothing about its principle.
The full name of GPS is the Global Positioning System, the global satellite positioning system. This technology, which exists in everyone's mobile phone, actually comes from the US military. In the 1950s and 1960s, the US Department of Defense developed a positioning system based on satellite networks based on the positioning requirements of the sea, land and air force. At the end of the Cold War, 24 satellites were launched, and GPS was officially put into use. At the end of the Cold War, GPS began to be put into the civilian market, forming a monopoly trend almost everywhere in the world.
From a technical point of view, GPS uses a triangulation method. Because the position of the satellite in orbit is fixed, the GPS receiver is located on the ground, and the signal is transmitted to the satellite in the air. The distance is calculated by the time of signal arrival and return, and a distance is obtained. The distance is the diameter and the satellite position is the center of the circle. The intersection of the curve and the Earth is where the GPS receiver is located.
GPS that you don't know is more dangerous than you think.
When I saw this, I felt a little shocked. I used to follow me every day and know that all my secret systems came from the US military.
In fact, for GPS, or positioning information, we should have more vigilance.
First of all, it is because a large number of terminals collect and upload our location information when it is not necessary. To understand this, just look at how many geographically unrelated products are sent to the user when they install the app. Once authorized, it is difficult to guarantee that these products will not abuse their power. For example, Uber had a scandal last year, when users found themselves ending their service, Uber will continue to track their position for up to five minutes. Uber even arbitrarily acknowledged this and claimed that he was trying to optimize the details of the space to provide better service (it must be said that Uber's rogue attitude is not the most disgusting technology company in American corporate culture).
(the trajectory around the Pentagon)
Not only mobile apps, but also a lot of smart hardware is also collecting our location information. If you don't read the manual carefully, you won't find it. The most typical one is the "smart bracelet military leak" incident at the end of last year. A GPS tracking company that serves smart sports bracelets such as Fitbit and Jawbone has released a global thermal tracking map to show the running of users wearing bracelets. route. Unexpectedly, the US military distributed a sports bracelet to many soldiers. These bracelets honestly recorded the movements of soldiers and even patrols, and honestly displayed them to the world through thermal tracking maps.
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