PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-14:27:40
G01     110.4          23.4                8.1 +/-    0.96      16.3 +/-    0.96  0.190 / 0.420
G07     102.9          57.5                7.6 +/-    0.70       8.8 +/-    0.70  0.160 / 0.370
G08     42.2           21.8                5.7 +/-    2.25      11.9 +/-    2.25  0.030 / 0.040
G09     174.4          15.8                6.9 +/-    3.41      16.8 +/-    3.41  0.030 / 0.040
G11     91.2           40.3                8.1 +/-    0.49      11.7 +/-    0.49  0.090 / 0.150
G13     313.7          24.5                5.8 +/-    1.95      11.5 +/-    1.95  0.090 / 0.170
G17     203.7          36.4                9.8 +/-    1.30      15.2 +/-    1.30  0.030 / 0.030
G19     207.8          11.1               -0.5 +/-    8.91      -1.4 +/-    8.91  0.030 / 0.020
G28     310.4          60.0                5.6 +/-    0.63       6.4 +/-    0.63  0.080 / 0.140
G30     0.3            74.1                6.7 +/-    0.86       6.9 +/-    0.86  0.080 / 0.130