PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-10:13:00
G02     48.5           41.6                3.8 +/-    1.10       5.3 +/-    1.10  0.030 / 0.020
G05     95.1           69.2                6.1 +/-    0.49       6.5 +/-    0.49  0.020 / 0.020
G12     190.9          51.2                8.4 +/-    0.56      10.5 +/-    0.56  0.040 / 0.070
G20     203.3          39.1                5.6 +/-    0.51       8.2 +/-    0.51  0.040 / 0.080
G21     260.2          10.8               -5.5 +/-    9.02     -15.2 +/-    9.02  0.050 / 0.100
G25     267.2          58.2                3.8 +/-    1.55       4.4 +/-    1.55  0.080 / 0.090
G29     319.8          43.0                4.5 +/-    0.78       6.2 +/-    0.78  0.120 / 0.330