PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-16:27:30
G02     4.3            73.5               10.2 +/-    0.39      10.6 +/-    0.39  0.050 / 0.080
G05     164.8          38.7               12.7 +/-    1.06      18.8 +/-    1.06  0.070 / 0.080
G06     43.9           34.3                9.2 +/-    1.09      14.9 +/-    1.09  0.020 / 0.020
G12     289.3          77.5               10.6 +/-    0.77      10.8 +/-    0.77  0.020 / 0.020
G19     83.5           20.9                9.9 +/-    1.78      21.3 +/-    1.78  0.220 / 0.290
G24     224.0          17.7               12.4 +/-    2.68      28.9 +/-    2.68  0.130 / 0.280
G25     314.5          39.0               10.0 +/-    0.66      14.8 +/-    0.66  0.050 / 0.060
G29     293.8          16.9               11.4 +/-    2.78      27.1 +/-    2.78  0.040 / 0.070