Not exact matches
At the
same time, old equipment, mechanical failures, busted rails and
signals and overcrowding has led to increased delays with more than 20 percent of all trains
arriving late.
The delays are chosen so that the copies of a
signal arrive at the intended receivers
at exactly the
same instant, but
at slightly different
times at all other receivers.
Because the
signals arriving at a receiver from all satellites are measured
at the
same time, the distance measurements are all falsified by the
same receiver clock error, which must be calculated in order to determine an accurate position.