PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-17:58:10
G02     53.1           39.4                7.8 +/-    0.64      11.5 +/-    0.64  0.030 / 0.040
G05     70.2           67.3                7.2 +/-    0.33       7.7 +/-    0.33  0.030 / 0.040
G12     183.1          35.3                9.0 +/-    1.05      14.3 +/-    1.05  0.120 / 0.330
G13     131.5          11.9               12.9 +/-    2.71      34.4 +/-    2.71  0.110 / 0.270
G21     267.5          14.2                8.3 +/-    1.75      21.1 +/-    1.75  0.050 / 0.060
G25     240.8          54.8                8.8 +/-    0.90      10.5 +/-    0.90  0.050 / 0.080
G29     324.7          49.2                7.6 +/-    1.55       9.6 +/-    1.55  0.120 / 0.480