PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-22:57:50
G02     47.9           42.7               11.0 +/-    1.32      15.4 +/-    1.32  0.030 / 0.050
G05     88.6           68.9               11.6 +/-    0.68      12.3 +/-    0.68  0.040 / 0.050
G12     185.8          46.0               12.6 +/-    0.67      16.7 +/-    0.67  0.030 / 0.030
G25     262.5          58.2               11.4 +/-    1.54      13.1 +/-    1.54  0.030 / 0.030
G29     318.7          40.9               11.1 +/-    1.23      15.9 +/-    1.23  0.030 / 0.040