PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-14:28:10
G02     220.9          60.1                8.6 +/-    1.70       9.8 +/-    1.70  0.050 / 0.070
G06     48.8           69.4                7.5 +/-    0.44       7.9 +/-    0.44  0.090 / 0.080
G12     320.7          43.3                7.4 +/-    0.81      10.3 +/-    0.81  0.040 / 0.040
G17     61.8           28.3                7.6 +/-    2.50      13.8 +/-    2.50  0.050 / 0.050
G19     39.1           50.0                7.2 +/-    1.05       9.0 +/-    1.05  0.030 / 0.030
G24     256.2          40.6                7.7 +/-    4.44      11.0 +/-    4.44  0.030 / 0.030
G28     125.2          11.2                8.4 +/-    3.29      22.9 +/-    3.29  0.060 / 0.040