PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-17:27:50
G01     38.7           11.6                8.8 +/-    2.63      23.8 +/-    2.63  0.130 / 0.430
G06     173.0          45.9               15.1 +/-    1.20      20.0 +/-    1.20  0.130 / 0.430
G13     234.6          18.3               12.5 +/-    1.58      28.6 +/-    1.58  0.070 / 0.150
G15     269.4          10.3               11.0 +/-    2.12      30.4 +/-    2.12  0.090 / 0.190
G17     16.8           64.0               11.0 +/-    0.46      12.1 +/-    0.46  0.080 / 0.200
G19     303.6          72.2               11.7 +/-    0.89      12.3 +/-    0.89  0.100 / 0.160
G24     315.2          22.4                8.3 +/-    1.71      17.3 +/-    1.71  0.040 / 0.040
G28     79.3           43.8               10.7 +/-    0.84      14.7 +/-    0.84  0.030 / 0.050
G30     156.4          24.0               12.5 +/-    2.13      25.0 +/-    2.13  0.130 / 0.430