PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/14-07:42:50
G07     317.4          51.7                4.3 +/-    1.04       5.3 +/-    1.04  0.100 / 0.150
G08     114.9          46.7                7.7 +/-    1.14      10.1 +/-    1.14  0.140 / 0.150
G09     199.2          82.3                4.9 +/-    0.56       4.9 +/-    0.56  0.050 / 0.120
G16     43.6           15.4                1.6 +/-    2.40       4.0 +/-    2.40  0.050 / 0.040
G23     150.7          55.6                6.6 +/-    0.42       7.9 +/-    0.42  0.030 / 0.050
G27     69.6           36.9                5.4 +/-    0.86       8.3 +/-    0.86  0.040 / 0.040
G28     228.6          18.9                5.1 +/-    1.20      11.6 +/-    1.20  0.040 / 0.060
G30     291.7          26.0                3.5 +/-    1.54       6.7 +/-    1.54  0.030 / 0.040