PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-10:57:30
G10     243.3          19.6                4.2 +/-    2.47       9.2 +/-    2.47  0.050 / 0.050
G13     63.7           34.8                4.2 +/-    0.88       6.7 +/-    0.88  0.040 / 0.040
G15     102.3          56.6                5.2 +/-    0.47       6.1 +/-    0.47  0.040 / 0.030
G16     306.1          14.2                3.8 +/-    3.05       9.6 +/-    3.05  0.040 / 0.040
G20     30.0           61.8                2.8 +/-    0.55       3.1 +/-    0.55  0.070 / 0.350
G21     326.0          55.8                2.9 +/-    0.44       3.4 +/-    0.44  0.120 / 0.310
G26     277.0          18.6                3.0 +/-    0.71       6.8 +/-    0.71  0.070 / 0.080
G29     160.7          58.4                5.7 +/-    0.57       6.6 +/-    0.57  0.070 / 0.090