PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-12:57:40
G01     114.0          21.2                6.1 +/-    0.98      12.9 +/-    0.98  0.040 / 0.070
G07     96.0           60.6                5.6 +/-    0.83       6.4 +/-    0.83  0.030 / 0.030
G08     42.9           25.0                4.5 +/-    0.82       8.9 +/-    0.82  0.030 / 0.040
G09     174.4          18.6                7.1 +/-    1.77      16.2 +/-    1.77  0.030 / 0.030
G11     96.7           40.0                5.6 +/-    0.75       8.2 +/-    0.75  0.060 / 0.300
G13     316.0          21.7                1.7 +/-    1.12       3.5 +/-    1.12  0.060 / 0.240
G17     202.4          32.6                5.3 +/-    1.30       8.7 +/-    1.30  0.060 / 0.100
G28     303.4          59.1                4.0 +/-    0.83       4.6 +/-    0.83  0.060 / 0.090
G30     352.5          71.3                3.5 +/-    1.22       3.7 +/-    1.22  0.090 / 0.140