PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-13:58:10
G01     68.0           32.3                6.5 +/-    0.94      10.8 +/-    0.94  0.060 / 0.120
G07     138.5          26.2                8.1 +/-    0.70      15.5 +/-    0.70  0.060 / 0.110
G11     51.4           26.7                5.5 +/-    1.28      10.4 +/-    1.28  0.030 / 0.040
G13     274.2          36.5                8.3 +/-    1.32      12.9 +/-    1.32  0.030 / 0.040
G15     302.8          14.8                2.0 +/-    2.73       5.1 +/-    2.73  0.040 / 0.110
G17     240.4          73.7                6.7 +/-    0.53       6.9 +/-    0.53  0.040 / 0.120
G19     226.2          46.1                9.1 +/-    1.69      12.0 +/-    1.69  0.050 / 0.070
G28     23.9           58.6                6.9 +/-    0.37       7.9 +/-    0.37  0.050 / 0.090
G30     136.9          61.7                8.3 +/-    0.47       9.3 +/-    0.47  0.030 / 0.040