PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-08:57:50
G08     108.2          48.8                6.5 +/-    0.53       8.4 +/-    0.53  0.040 / 0.050
G09     198.0          79.8                3.5 +/-    0.50       3.6 +/-    0.50  0.040 / 0.050
G16     44.2           16.1                3.7 +/-    1.98       8.9 +/-    1.98  0.070 / 0.160
G23     152.9          51.8                6.6 +/-    0.67       8.2 +/-    0.67  0.090 / 0.140
G27     62.0           34.2                4.2 +/-    1.11       6.8 +/-    1.11  0.040 / 0.040
G28     231.9          23.8                6.1 +/-    4.71      12.3 +/-    4.71  0.040 / 0.050
G30     295.0          28.8                2.8 +/-    2.01       5.1 +/-    2.01  0.220 / 0.200