PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-19:13:10
G01     319.4          16.6                7.1 +/-    2.41      16.9 +/-    2.41  0.040 / 0.060
G08     259.1          13.9                7.8 +/-    2.71      19.8 +/-    2.71  0.040 / 0.060
G10     76.7           54.6                8.0 +/-    0.58       9.5 +/-    0.58  0.020 / 0.020
G11     305.1          21.9                8.9 +/-    1.34      18.8 +/-    1.34  0.030 / 0.030
G14     292.4          70.2                7.3 +/-    0.45       7.7 +/-    0.45  0.030 / 0.040
G18     101.2          28.5                8.9 +/-    0.78      16.1 +/-    0.78  0.040 / 0.030
G31     177.8          39.0               11.2 +/-    1.09      16.5 +/-    1.09  0.040 / 0.030
G32     2.1            68.9                7.8 +/-    0.36       8.3 +/-    0.36  0.040 / 0.030