GPS ..( ) . - - .
: ҿ . ɿ ɿ ɿ GPS 3 : - GIS - . ( ) ( 10 3 ) (4-8 ). 10 Geo XH 90% .
- - : Single-Frequency Receivers ( 10 ) Doual-Frequency Receivers . .
Accessories ڿ Real-Time Software Post-Processing GPS Reference Receiver Rover Receiver . ( 3 30 ).
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- - . . GPS !!
: ( - .... ) GPS . GPS : Trimble , Lieca Sokkia Topcon . .