PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/24-13:27:50
G01     115.7          20.3                9.0 +/-    1.30      19.6 +/-    1.30  0.030 / 0.020
G07     89.8           64.5                7.6 +/-    0.96       8.3 +/-    0.96  0.030 / 0.020
G08     43.4           27.3                6.0 +/-    2.15      11.1 +/-    2.15  0.040 / 0.030
G09     175.2          20.6                7.0 +/-    1.73      15.2 +/-    1.73  0.050 / 0.040
G11     100.7          41.2                7.4 +/-    0.63      10.6 +/-    0.63  0.120 / 0.180
G13     315.6          22.6                3.7 +/-    1.55       7.7 +/-    1.55  0.110 / 0.190
G17     202.5          28.8                8.0 +/-    1.51      14.4 +/-    1.51  0.090 / 0.160
G18     89.8           22.1                6.0 +/-    1.30      12.6 +/-    1.30  0.120 / 0.200
G28     299.7          58.7                5.6 +/-    1.14       6.5 +/-    1.14  0.130 / 0.170
G30     351.5          71.2                6.5 +/-    0.70       6.8 +/-    0.70  0.140 / 0.170