PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-12:27:50
G01     116.8          19.5                5.3 +/-    0.72      11.8 +/-    0.72  0.030 / 0.040
G07     87.1           65.1                4.2 +/-    0.45       4.6 +/-    0.45  0.030 / 0.040
G08     43.6           27.8                3.4 +/-    0.65       6.2 +/-    0.65  0.130 / 0.190
G09     175.1          21.4                4.6 +/-    0.61       9.8 +/-    0.61  0.150 / 0.150
G11     101.9          40.8                6.4 +/-    0.66       9.2 +/-    0.66  0.040 / 0.050
G13     316.3          21.7                0.4 +/-    1.91       0.9 +/-    1.91  0.040 / 0.060
G17     202.0          28.1                4.2 +/-    1.01       7.7 +/-    1.01  0.020 / 0.040
G18     90.9           21.7                4.6 +/-    0.92       9.7 +/-    0.92  0.020 / 0.050
G28     297.2          58.2                3.6 +/-    1.24       4.1 +/-    1.24  0.050 / 0.090
G30     348.3          69.9                2.6 +/-    1.30       2.7 +/-    1.30  0.060 / 0.080