PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-10:27:30
G01     104.9          26.6                5.6 +/-    1.21      10.6 +/-    1.21  0.020 / 0.020
G07     110.6          55.9                6.7 +/-    0.41       7.9 +/-    0.41  0.030 / 0.020
G08     41.5           16.8                3.1 +/-    2.05       7.4 +/-    2.05  0.090 / 0.150
G11     84.2           42.5                7.6 +/-    0.98      10.6 +/-    0.98  0.070 / 0.130
G13     307.6          30.3                5.8 +/-    1.42      10.0 +/-    1.42  0.070 / 0.140
G17     206.2          41.6                7.1 +/-    0.73      10.1 +/-    0.73  0.070 / 0.150
G18     76.6           24.2                5.5 +/-    1.94      11.0 +/-    1.94  0.030 / 0.040
G19     210.3          10.9               -0.9 +/-    7.55      -2.5 +/-    7.55  0.040 / 0.040
G28     320.5          61.1                4.5 +/-    0.59       5.1 +/-    0.59  0.030 / 0.040
G30     25.5           79.0                6.0 +/-    0.57       6.1 +/-    0.57  0.030 / 0.040