PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-08:57:20
G02     230.7          73.6                4.7 +/-    0.62       4.9 +/-    0.62  0.230 / 0.370
G05     173.7          12.0                4.0 +/-    2.97      10.7 +/-    2.97  0.310 / 0.390
G06     42.4           69.2                4.7 +/-    0.42       4.9 +/-    0.42  0.030 / 0.050
G12     320.9          45.5                4.3 +/-    0.41       5.8 +/-    0.41  0.030 / 0.040
G17     67.7           24.6                5.6 +/-    0.79      11.0 +/-    0.79  0.060 / 0.080
G19     53.4           40.7                3.5 +/-    0.93       5.0 +/-    0.93  0.070 / 0.080
G24     252.2          37.4                3.2 +/-    1.80       4.9 +/-    1.80  0.030 / 0.020