The U.S. Land Administration developed GPS -based geographical information systems (GIS) in the middle of the 1920s. Number of wild animals, etc. There are tens of thousands of wild horses and cat...
The GPS system is extremely important during the implementation of fine agriculture: it can give accurate positioning of various information about farmland, including navigation, flat land, accura...
It can be used in the military positioning of collaborative combat, missile guidance, search and rescue personnel. In terms of collaborative combat, GPS can provide various goals and time and plac...
The basic role of antennas is to convert the energy from satellite signals into the corresponding current and change the frequency transformation by the front placement in order to track, process ...
(1) Observation error. In addition to the distinguishing error, it also includes the resettlement error of receiving an antenna relative to measure. The resolution error is generally considered to...
The positioning of the current location and the positioning of the target are two key technologies of the ground vehicle navigation system. The former requires GPS to obtain points, while the latt...
Use GPS to monitor global and regional sectors, monitor regional crust movements, and study the cause of the earth's causes and power mechanisms. Study the underground fault activity mode and ...
The global positioning system consists of the following three parts: space part (GPS satellite), ground monitoring part and user part. The GPS satellite can continuously broadcast the ranging sign...
The main body of the GPS satellite is cylindrical, and there are solar windsurfing on both sides, which can automatically set the sun. Solar batteries provide work for satellites. Each satellite i...
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