PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-10:42:30
G02     28.7           59.7                5.7 +/-    1.06       6.5 +/-    1.06  0.040 / 0.040
G05     149.4          55.6                9.6 +/-    0.43      11.4 +/-    0.43  0.040 / 0.040
G06     48.6           26.4                3.6 +/-    1.94       6.8 +/-    1.94  0.110 / 0.240
G12     221.0          75.6                7.0 +/-    0.41       7.2 +/-    0.41  0.240 / 0.320
G19     94.9           13.2                7.1 +/-    2.11      18.3 +/-    2.11  0.020 / 0.020
G20     199.1          16.9                4.4 +/-    1.73      10.5 +/-    1.73  0.020 / 0.030
G25     305.8          48.4                5.3 +/-    2.98       6.8 +/-    2.98  0.120 / 0.150
G29     304.0          26.0                5.1 +/-    2.11       9.8 +/-    2.11  0.140 / 0.100