PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/14-10:58:00
G02     65.6           26.7                1.1 +/-    1.47       2.0 +/-    1.47  0.030 / 0.030
G05     51.3           55.2                3.0 +/-    0.56       3.5 +/-    0.56  0.040 / 0.040
G12     185.1          27.6                4.1 +/-    0.96       7.5 +/-    0.96  0.220 / 0.310
G13     124.4          19.2                7.0 +/-    2.93      15.7 +/-    2.93  0.150 / 0.180
G15     159.2          17.6                5.7 +/-    2.15      13.3 +/-    2.15  0.060 / 0.100
G20     213.9          62.5                6.1 +/-    0.84       6.8 +/-    0.84  0.070 / 0.110
G21     277.6          24.2                4.2 +/-    1.65       8.3 +/-    1.65  0.040 / 0.040
G25     229.4          47.4                6.6 +/-    3.14       8.6 +/-    3.14  0.040 / 0.040
G29     335.2          63.1                2.7 +/-    0.40       3.0 +/-    0.40  0.130 / 0.180