PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-14:58:10
G02     202.4          24.2               10.3 +/-    2.37      20.5 +/-    2.37  0.360 / 0.440
G06     163.1          62.7                9.8 +/-    0.36      10.9 +/-    0.36  0.170 / 0.430
G12     304.7          14.0                6.9 +/-    3.06      17.5 +/-    3.06  0.070 / 0.100
G17     30.5           53.6                8.6 +/-    0.86      10.4 +/-    0.86  0.080 / 0.090
G19     330.8          69.4                8.7 +/-    0.68       9.2 +/-    0.68  0.110 / 0.190
G24     304.0          35.3                8.7 +/-    1.68      13.7 +/-    1.68  0.090 / 0.170
G28     94.6           36.2                8.5 +/-    1.02      13.3 +/-    1.02  0.040 / 0.030
G30     158.3          10.3                9.3 +/-    3.46      25.8 +/-    3.46  0.040 / 0.030