PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-13:27:50
G01     108.7          24.6                8.1 +/-    1.23      16.0 +/-    1.23  0.030 / 0.020
G07     104.1          59.5                8.4 +/-    0.97       9.6 +/-    0.97  0.030 / 0.030
G08     41.9           20.8                7.8 +/-    2.79      16.7 +/-    2.79  0.040 / 0.040
G09     174.0          13.6                6.8 +/-    1.15      17.5 +/-    1.15  0.040 / 0.030
G11     90.3           42.5                8.1 +/-    0.67      11.3 +/-    0.67  0.080 / 0.110
G13     310.8          27.7                4.4 +/-    1.48       8.1 +/-    1.48  0.080 / 0.130
G17     204.9          36.6                7.9 +/-    0.94      12.2 +/-    0.94  0.060 / 0.140
G18     81.8           23.9                4.5 +/-    2.22       9.0 +/-    2.22  0.110 / 0.150
G28     314.1          60.6                6.1 +/-    1.14       6.9 +/-    1.14  0.070 / 0.140
G30     11.2           76.7                8.0 +/-    1.15       8.2 +/-    1.15  0.080 / 0.160