PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-14:58:10
G01     48.4           23.9                9.0 +/-    0.68      17.9 +/-    0.68  0.040 / 0.070
G06     177.5          27.1               13.6 +/-    1.43      25.4 +/-    1.43  0.050 / 0.070
G11     43.6           10.9                8.7 +/-    2.23      23.8 +/-    2.23  0.060 / 0.210
G13     250.6          29.2               10.5 +/-    1.56      18.7 +/-    1.56  0.060 / 0.200
G15     284.3          15.1                7.0 +/-    2.39      17.4 +/-    2.39  0.060 / 0.130
G17     337.9          77.4               13.2 +/-    0.69      13.5 +/-    0.69  0.050 / 0.140
G19     252.3          63.8               11.4 +/-    0.56      12.5 +/-    0.56  0.020 / 0.030
G28     55.9           51.9               10.2 +/-    0.43      12.6 +/-    0.43  0.030 / 0.030
G30     150.7          41.3               12.0 +/-    0.65      17.1 +/-    0.65  0.110 / 0.320