PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-09:57:50
G01     97.4           29.7                5.9 +/-    0.98      10.3 +/-    0.98  0.040 / 0.040
G07     119.4          50.1                6.8 +/-    0.43       8.5 +/-    0.43  0.040 / 0.040
G08     41.7           10.9                3.1 +/-    2.98       8.6 +/-    2.98  0.090 / 0.110
G11     74.8           41.3                5.7 +/-    1.00       8.1 +/-    1.00  0.080 / 0.110
G13     301.1          34.0                3.0 +/-    1.10       4.9 +/-    1.10  0.030 / 0.030
G17     209.7          49.0                6.6 +/-    0.88       8.4 +/-    0.88  0.030 / 0.020
G18     68.9           24.1                4.5 +/-    0.81       9.1 +/-    0.81  0.060 / 0.130
G19     212.5          17.3                5.3 +/-    1.51      12.4 +/-    1.51  0.050 / 0.120
G28     334.3          61.8                4.6 +/-    0.57       5.2 +/-    0.57  0.080 / 0.100
G30     66.9           80.4                5.6 +/-    1.26       5.7 +/-    1.26  0.060 / 0.140