PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-12:27:50
G01     114.6          20.9                3.8 +/-    0.99       8.1 +/-    0.99  0.070 / 0.310
G07     94.7           61.2                2.5 +/-    0.32       2.9 +/-    0.32  0.090 / 0.310
G08     43.0           25.5                2.8 +/-    0.84       5.4 +/-    0.84  0.040 / 0.040
G09     174.3          18.9                4.2 +/-    1.22       9.6 +/-    1.22  0.040 / 0.030
G11     97.7           39.9                3.5 +/-    0.73       5.1 +/-    0.73  0.030 / 0.040
G13     316.4          21.2                1.3 +/-    2.67       2.7 +/-    2.67  0.020 / 0.040
G17     202.3          31.9                4.5 +/-    1.66       7.7 +/-    1.66  0.100 / 0.140
G28     302.3          59.0                2.3 +/-    0.98       2.7 +/-    0.98  0.090 / 0.150
G30     351.6          70.9                1.5 +/-    1.03       1.5 +/-    1.03  0.070 / 0.110