PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-15:27:30
G02     258.9          76.8                5.9 +/-    0.23       6.1 +/-    0.23  0.130 / 0.170
G05     171.1          20.9                8.7 +/-    3.01      18.7 +/-    3.01  0.150 / 0.170
G06     40.0           50.0                5.8 +/-    0.84       7.4 +/-    0.84  0.020 / 0.030
G12     321.2          63.1                5.9 +/-    0.46       6.5 +/-    0.46  0.020 / 0.040
G17     77.5           16.8                6.4 +/-    1.53      15.3 +/-    1.53  0.260 / 0.270
G19     60.8           38.1                6.4 +/-    1.98       9.5 +/-    1.98  0.170 / 0.270
G24     235.3          29.9                7.1 +/-    1.78      12.5 +/-    1.78  0.030 / 0.040
G25     317.5          20.5                3.6 +/-    2.27       7.9 +/-    2.27  0.030 / 0.040