sx	rx	ft			!source x pos(m), receiver x pos(m), first time(msec)
0	1	20			
0	2	30			
0	3	40			
0	4	50			
0	5	60			
0	6	70			
0	7	80			
0	8	90			
0	9	100			
1	0	20			
1	2	20			
1	3	30			
1	4	40			
1	5	50			
1	6	60			
1	7	70			
1	8	80			
1	9	90			
