In December 2011, the system went into operation on a trial basis. It has started providing navigation, positioning and timing data to China and the neighbouring area for free from 27 December. During this trial run, Compass will offer positioning accuracy to within 25 meters, but the precision will improve as more satellites are launched. Upon the system's official launch, it pledged to offer general users positioning information accurate to the nearest 10 m, measure speeds within 0.2 m per second, and provide signals for clock synchronisation accurate to 0.02 microseconds. COUNT 5
QSN1 When did the Compass system begin operation on a trial bases? ANS1 December 2011 QSN2 When did the Compass system begin offering navigation, positioning and timing data to China and nearby locations? ANS2 27 December QSN3 What will improve the positioning accuracy of the Compass system? ANS3 as more satellites are launched QSN4 Upon launching, the Compass system, what was the location accuracy promised to users? ANS4 accurate to the nearest 10 m QSN5 Upon launching, the Compass system, what was the speed promised to users? ANS5 within 0.2 m per second