PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-03:12:40
G02     57.0           34.2                4.7 +/-    2.04       7.5 +/-    2.04  0.160 / 0.320
G05     62.6           62.9                5.0 +/-    0.49       5.6 +/-    0.49  0.280 / 0.290
G12     187.2          39.0                7.8 +/-    1.81      11.5 +/-    1.81  0.180 / 0.450
G13     130.1          12.5                5.5 +/-    2.13      14.6 +/-    2.13  0.230 / 0.320
G15     164.8          10.1               -8.8 +/-    9.40     -24.5 +/-    9.40  0.060 / 0.040
G21     269.2          16.5                7.8 +/-    1.57      18.6 +/-    1.57  0.050 / 0.060
G25     240.8          54.4                4.3 +/-    2.10       5.2 +/-    2.10  0.050 / 0.060
G29     330.1          55.2                6.6 +/-    1.10       7.9 +/-    1.10  0.060 / 0.080