PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/10-13:27:50
G02     67.8           25.2                3.1 +/-    1.88       6.1 +/-    1.88  0.040 / 0.040
G05     49.5           53.5                5.3 +/-    0.61       6.5 +/-    0.61  0.040 / 0.030
G12     184.4          24.5                7.7 +/-    0.76      15.2 +/-    0.76  0.030 / 0.030
G13     122.2          21.2                5.4 +/-    2.20      11.6 +/-    2.20  0.030 / 0.030
G15     157.6          19.9                5.0 +/-    0.94      11.1 +/-    0.94  0.120 / 0.140
G20     215.8          67.4                8.9 +/-    0.66       9.6 +/-    0.66  0.090 / 0.130
G21     280.7          27.2                5.2 +/-    1.49       9.7 +/-    1.49  0.100 / 0.230
G25     225.1          44.7                8.0 +/-    3.13      10.8 +/-    3.13  0.080 / 0.140
G29     340.0          67.6                5.5 +/-    0.38       5.9 +/-    0.38  0.150 / 0.170