PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-17:27:50
G02     41.0           49.0                7.0 +/-    0.36       8.9 +/-    0.36  0.030 / 0.030
G05     113.8          70.0                7.7 +/-    0.80       8.2 +/-    0.80  0.030 / 0.040
G12     185.8          50.5                7.9 +/-    1.57       9.8 +/-    1.57  0.040 / 0.050
G25     268.7          59.4                7.6 +/-    0.83       8.7 +/-    0.83  0.030 / 0.060
G29     315.8          37.3                6.8 +/-    0.79      10.4 +/-    0.79  0.040 / 0.060