PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-18:42:50
G01     319.2          17.2                9.8 +/-    1.98      23.0 +/-    1.98  0.040 / 0.060
G08     258.6          13.5               11.3 +/-    2.41      29.2 +/-    2.41  0.050 / 0.060
G10     78.0           54.2               10.1 +/-    0.71      12.2 +/-    0.71  0.020 / 0.030
G11     304.6          22.1                9.7 +/-    1.72      20.3 +/-    1.72  0.020 / 0.020
G14     294.3          70.3                9.5 +/-    0.55      10.0 +/-    0.55  0.040 / 0.040
G18     101.9          27.9               10.7 +/-    0.97      19.6 +/-    0.97  0.030 / 0.040
G31     177.4          40.1               12.9 +/-    1.23      18.8 +/-    1.23  0.050 / 0.030
G32     4.4            68.3                8.4 +/-    0.57       8.9 +/-    0.57  0.030 / 0.030