PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-14:28:00
G01     108.6          24.4                7.9 +/-    1.24      15.6 +/-    1.24  0.030 / 0.040
G07     105.8          56.2                8.4 +/-    0.62       9.9 +/-    0.62  0.030 / 0.040
G08     41.9           20.2                5.9 +/-    0.48      12.9 +/-    0.48  0.080 / 0.200
G09     174.1          14.1                9.1 +/-    0.82      23.1 +/-    0.82  0.070 / 0.200
G11     88.7           40.5                9.3 +/-    0.81      13.4 +/-    0.81  0.070 / 0.150
G13     312.4          25.7                7.2 +/-    2.09      13.8 +/-    2.09  0.080 / 0.140
G17     204.4          38.3                7.6 +/-    1.77      11.4 +/-    1.77  0.030 / 0.030
G19     208.3          12.8                8.0 +/-    1.32      21.0 +/-    1.32  0.030 / 0.040
G28     314.1          60.4                9.0 +/-    0.86      10.2 +/-    0.86  0.050 / 0.070
G30     5.7            75.5                9.4 +/-    0.59       9.6 +/-    0.59  0.070 / 0.070