The GPS system is becoming a more and more esteemed technology thanks to the continuous exploration of its possible uses; one example is the levelling of land (especially in case of large extents, where it would be uncomfortable having to frequently move the transmitter of a laser system because of its limited range). The GPS system consists of three parts:
The space system of the satellites (placed at a distance of about 20 km from the surface of the Earth, each satellite of them equipped with 4 atomic clocks which guarantee the absolute precision) covers the whole planet and it works 24 hours under any atmospheric condition. The use of a positioning system can also be useful to drive a vehicle: in the precision levelling of the agricultural sector, technics of computerized navigation help tractors to move within parallel rows (that is, within a narrow portion of land according to parallel rows, without leaving any space or overlaps between consecutive passages).
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PARALLEL DRIVING SYSTEMS The use of a positioning system can also be useful to drive a vehicle: in the precision levelling of the agricultural sector, technics of computerized navigation help tractors to move within parallel rows (that is, within a narrow portion of land according to parallel rows, without leaving any space or overlaps between consecutive passages). |