PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-13:58:00
G01     117.7          18.6                7.7 +/-    1.20      17.5 +/-    1.20  0.070 / 0.090
G07     88.1           62.8                7.6 +/-    0.68       8.4 +/-    0.68  0.080 / 0.110
G08     44.1           28.6                3.8 +/-    0.86       6.9 +/-    0.86  0.030 / 0.040
G09     175.5          23.4                8.2 +/-    1.65      16.7 +/-    1.65  0.040 / 0.040
G11     101.9          38.7                7.6 +/-    0.56      11.3 +/-    0.56  0.110 / 0.260
G13     318.1          18.6                5.6 +/-    1.01      12.8 +/-    1.01  0.120 / 0.280
G17     201.3          28.1                8.7 +/-    2.04      15.9 +/-    2.04  0.030 / 0.040
G28     295.2          57.7                6.3 +/-    1.22       7.3 +/-    1.22  0.020 / 0.040
G30     344.2          67.5                6.1 +/-    0.99       6.6 +/-    0.99  0.120 / 0.260