PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-10:42:30
G07     9.1            66.5                5.3 +/-    0.59       5.7 +/-    0.59  0.040 / 0.040
G08     68.9           49.2                4.8 +/-    0.69       6.1 +/-    0.69  0.040 / 0.040
G09     177.4          53.2                8.5 +/-    0.67      10.4 +/-    0.67  0.030 / 0.030
G11     132.3          23.3                4.7 +/-    1.22       9.5 +/-    1.22  0.030 / 0.020
G23     159.9          26.7                5.7 +/-    2.23      10.7 +/-    2.23  0.210 / 0.230
G27     42.7           20.3                3.7 +/-    1.87       8.1 +/-    1.87  0.130 / 0.120
G28     252.9          42.0                7.0 +/-    2.16       9.9 +/-    2.16  0.050 / 0.050
G30     314.0          44.7                4.5 +/-    0.79       6.1 +/-    0.79  0.040 / 0.040