PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/04-10:27:50
G02     234.5          74.9                6.2 +/-    0.53       6.4 +/-    0.53  0.140 / 0.230
G05     173.5          13.1                4.9 +/-    2.09      12.8 +/-    2.09  0.190 / 0.190
G06     41.2           66.7                4.8 +/-    0.41       5.2 +/-    0.41  0.060 / 0.100
G12     321.1          47.4                4.5 +/-    0.70       5.9 +/-    0.70  0.070 / 0.140
G17     69.5           23.0                3.6 +/-    2.19       7.5 +/-    2.19  0.030 / 0.040
G19     55.5           39.3                4.1 +/-    1.58       6.1 +/-    1.58  0.030 / 0.030
G24     250.2          36.5                4.5 +/-    1.69       6.9 +/-    1.69  0.040 / 0.030