PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-12:13:10
G01     92.7           31.1                3.2 +/-    1.90       5.4 +/-    1.90  0.030 / 0.030
G07     123.4          47.2                5.3 +/-    0.58       6.9 +/-    0.58  0.030 / 0.020
G11     69.8           39.8                3.7 +/-    1.94       5.3 +/-    1.94  0.030 / 0.040
G13     296.8          35.5                5.7 +/-    2.61       8.9 +/-    2.61  0.050 / 0.030
G17     212.3          53.2                5.3 +/-    1.06       6.5 +/-    1.06  0.100 / 0.120
G18     65.4           23.9                4.4 +/-    1.39       8.8 +/-    1.39  0.090 / 0.100
G19     213.9          21.6                5.1 +/-    2.80      10.8 +/-    2.80  0.070 / 0.110
G28     344.1          61.8                5.3 +/-    0.75       5.9 +/-    0.75  0.060 / 0.090
G30     89.6           79.1                5.3 +/-    0.90       5.4 +/-    0.90  0.060 / 0.110