PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-12:28:10
G01     99.3           28.9                3.7 +/-    0.73       6.6 +/-    0.73  0.030 / 0.050
G07     117.4          49.8                5.5 +/-    0.73       7.0 +/-    0.73  0.030 / 0.050
G08     41.7           12.5                3.1 +/-    3.22       8.3 +/-    3.22  0.060 / 0.120
G11     77.1           40.2                4.2 +/-    0.98       6.1 +/-    0.98  0.060 / 0.130
G13     305.2          31.0                6.0 +/-    1.51      10.3 +/-    1.51  0.040 / 0.090
G17     208.7          47.8                7.5 +/-    1.76       9.8 +/-    1.76  0.040 / 0.080
G19     211.0          21.2                4.6 +/-    0.91       9.9 +/-    0.91  0.030 / 0.030
G28     333.1          61.6                3.8 +/-    0.63       4.3 +/-    0.63  0.030 / 0.030
G30     51.9           80.0                3.7 +/-    0.64       3.7 +/-    0.64  0.100 / 0.160