PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-15:28:50
G02     299.8          79.7                6.3 +/-    0.39       6.4 +/-    0.39  0.190 / 0.200
G05     168.3          28.1                8.5 +/-    2.42      15.6 +/-    2.42  0.200 / 0.250
G06     41.0           42.5                5.1 +/-    0.82       7.1 +/-    0.82  0.030 / 0.030
G12     315.4          71.1                6.4 +/-    0.63       6.7 +/-    0.63  0.030 / 0.030
G17     83.8           12.1                7.1 +/-    1.74      18.9 +/-    1.74  0.070 / 0.090
G19     68.8           33.3                6.6 +/-    1.74      10.8 +/-    1.74  0.070 / 0.100
G24     228.6          24.5                8.5 +/-    1.30      16.8 +/-    1.30  0.160 / 0.140
G25     317.4          27.7                6.8 +/-    1.32      12.6 +/-    1.32  0.100 / 0.120