PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-12:13:00
G01     107.0          25.4                3.3 +/-    0.82       6.4 +/-    0.82  0.030 / 0.050
G07     108.0          55.7                4.4 +/-    0.46       5.1 +/-    0.46  0.030 / 0.040
G08     41.8           18.7                3.1 +/-    1.65       7.1 +/-    1.65  0.140 / 0.270
G09     173.1          11.6                5.3 +/-    1.26      14.4 +/-    1.26  0.160 / 0.220
G11     86.9           40.9                3.8 +/-    0.64       5.4 +/-    0.64  0.070 / 0.130
G13     311.3          26.7                3.0 +/-    1.10       5.6 +/-    1.10  0.070 / 0.140
G17     205.1          40.2                7.6 +/-    0.67      11.0 +/-    0.67  0.040 / 0.090
G19     208.8          14.4                3.5 +/-    2.09       8.8 +/-    2.09  0.040 / 0.090
G28     318.2          60.9                3.8 +/-    1.05       4.3 +/-    1.05  0.030 / 0.030
G30     14.3           77.0                4.8 +/-    0.84       4.9 +/-    0.84  0.030 / 0.030