PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-06:27:50
G01     66.7           32.3                2.9 +/-    0.52       4.8 +/-    0.52  0.040 / 0.050
G07     139.3          27.2                6.2 +/-    0.83      11.5 +/-    0.83  0.040 / 0.060
G11     51.8           28.3                1.2 +/-    0.68       2.2 +/-    0.68  0.050 / 0.120
G13     271.6          36.5                6.5 +/-    2.06      10.1 +/-    2.06  0.040 / 0.110
G15     299.0          16.3                5.0 +/-    1.99      12.0 +/-    1.99  0.030 / 0.030
G17     242.3          73.1                6.5 +/-    0.74       6.7 +/-    0.74  0.030 / 0.030
G19     227.3          46.6                8.0 +/-    1.14      10.6 +/-    1.14  0.120 / 0.270
G28     27.0           58.1                2.9 +/-    0.76       3.3 +/-    0.76  0.090 / 0.240
G30     138.4          56.8                6.3 +/-    0.98       7.4 +/-    0.98  0.040 / 0.070