PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-16:58:10
G02     54.1           38.3                7.3 +/-    0.67      10.9 +/-    0.67  0.040 / 0.070
G05     70.0           67.6                6.9 +/-    0.40       7.4 +/-    0.40  0.050 / 0.080
G12     183.5          35.2                9.9 +/-    1.71      15.6 +/-    1.71  0.040 / 0.080
G13     131.0          12.3               11.2 +/-    2.99      29.8 +/-    2.99  0.040 / 0.090
G21     268.2          14.9                8.8 +/-    1.11      21.9 +/-    1.11  0.100 / 0.320
G25     238.7          54.4                9.4 +/-    1.09      11.2 +/-    1.09  0.110 / 0.340
G29     325.3          50.0                8.7 +/-    1.14      11.0 +/-    1.14  0.030 / 0.030