PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-08:28:00
G07     332.3          57.6                3.1 +/-    0.80       3.6 +/-    0.80  0.030 / 0.050
G08     100.4          50.6                5.9 +/-    0.65       7.4 +/-    0.65  0.030 / 0.050
G09     188.7          75.0                4.1 +/-    0.51       4.2 +/-    0.51  0.040 / 0.030
G11     145.9          11.4                5.6 +/-    4.33      15.2 +/-    4.33  0.040 / 0.040
G16     45.6           12.5                1.6 +/-    1.75       4.2 +/-    1.75  0.030 / 0.020
G23     155.1          46.4                6.3 +/-    0.89       8.3 +/-    0.89  0.040 / 0.020
G27     56.7           32.1                3.8 +/-    1.73       6.3 +/-    1.73  0.080 / 0.110
G28     235.6          27.9                4.7 +/-    2.04       8.5 +/-    2.04  0.080 / 0.130
G30     299.1          32.2                2.9 +/-    3.56       4.8 +/-    3.56  0.040 / 0.040