PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-19:27:10
G02     47.6           43.5               10.9 +/-    1.29      15.0 +/-    1.29  0.020 / 0.030
G05     87.9           69.3               11.0 +/-    0.43      11.7 +/-    0.43  0.030 / 0.030
G12     183.3          42.8               12.2 +/-    2.23      16.9 +/-    2.23  0.050 / 0.080
G25     258.1          58.3               12.3 +/-    0.55      14.2 +/-    0.55  0.060 / 0.070
G29     319.3          41.7               12.4 +/-    1.05      17.6 +/-    1.05  0.050 / 0.060