P901 is the thinnest smart walkie-talkie with real time GPS tracking function.It can be used in any place with GSM signal regardless distance limitation.We've already tested one key push-to-talk N...
The main errors in GPS positioning include: star clock error, relativity error, earth rotation error, ionosphere and troposphere error. 1) Star clock error Star clock error is caused by the error ...
Global Positioning System (GPS) is the abbreviation of Global Positioning System. Its meaning is to use navigation satellites to measure time and distance to form a global positioning system. It i...
Bus No. 168 goes to Xinghu, and the distance between stops is 6; Route 28 to the Expo Center, 2 stations away; No. 156 bus is coming into the station... A few days ago, 43 electronic bus stop sign...
GPS is the abbreviation of Global Positioning System, which means global positioning system. It is a huge space and aerospace project implemented by the United States government after more than 20...
The control center provides operators with the ability to manage all vehicles in the center. One control center can operate multiple communication networks at the same time to manage multiple flee...
1 GPS Processor (GPSPU) It is an information system installed in the vehicle to continuously calculate the vehicle position. It has the characteristics of small size, unsmooth surface and light w...
The on-board system receives the data about the coordinate position of the satellite itself sent by satellites (24 in total, running in 6 satellite orbits on average) every second. The user receiv...
In addition to providing navigation information and other basic functions for driving, the on-board GPS system is also developing new services. The combination of GPS and wireless communication te...
The hardware system of on-board GPS is mainly composed of antenna, RF, baseband, processor, memory, bus interface and other modules. In the system architecture, these modules can be integrated or in...
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