PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-14:57:30
G02     205.3          34.7                8.8 +/-    1.62      14.0 +/-    1.62  0.120 / 0.070
G06     145.7          73.4                7.2 +/-    0.60       7.5 +/-    0.60  0.100 / 0.090
G12     310.8          22.3                6.2 +/-    2.05      13.0 +/-    2.05  0.110 / 0.150
G17     40.5           45.3                5.7 +/-    0.72       7.6 +/-    0.72  0.150 / 0.190
G19     358.6          65.2                6.5 +/-    0.46       7.1 +/-    0.46  0.040 / 0.020
G24     292.6          40.7                4.1 +/-   10.37       5.9 +/-   10.37  0.040 / 0.020
G28     105.1          29.4                5.9 +/-    1.15      10.5 +/-    1.15  0.040 / 0.040