PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-16:42:50
G02     28.7           58.4                7.0 +/-    0.77       8.1 +/-    0.77  0.030 / 0.040
G05     144.7          61.4                8.4 +/-    0.30       9.4 +/-    0.30  0.030 / 0.040
G06     54.2           14.6                6.8 +/-    3.25      17.0 +/-    3.25  0.030 / 0.030
G12     192.0          65.3                7.4 +/-    0.46       8.0 +/-    0.46  0.030 / 0.030
G19     98.7           13.3                7.8 +/-    1.93      20.2 +/-    1.93  0.050 / 0.050
G25     293.9          55.5                7.7 +/-    4.38       9.2 +/-    4.38  0.050 / 0.060
G29     307.2          27.5                6.7 +/-    0.85      12.4 +/-    0.85  0.150 / 0.280