PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-09:27:40
G01     98.1           29.5                6.4 +/-    0.94      11.3 +/-    0.94  0.040 / 0.040
G07     118.7          50.5                7.4 +/-    0.31       9.3 +/-    0.31  0.040 / 0.040
G08     41.6           11.3                3.4 +/-    3.01       9.3 +/-    3.01  0.040 / 0.020
G11     75.5           41.4                5.4 +/-    1.35       7.7 +/-    1.35  0.030 / 0.020
G13     301.7          33.7                2.3 +/-    1.73       3.8 +/-    1.73  0.070 / 0.120
G17     209.3          48.5                7.9 +/-    0.76      10.1 +/-    0.76  0.070 / 0.120
G18     69.4           24.1                4.9 +/-    1.20       9.8 +/-    1.20  0.060 / 0.130
G19     212.2          16.9                5.1 +/-    1.63      12.0 +/-    1.63  0.060 / 0.140
G28     332.9          61.7                5.0 +/-    0.63       5.6 +/-    0.63  0.070 / 0.120
G30     62.7           80.5                6.6 +/-    0.94       6.7 +/-    0.94  0.090 / 0.130