PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-15:43:10
G02     256.4          78.7                8.9 +/-    0.57       9.0 +/-    0.57  0.100 / 0.110
G05     173.1          17.8               13.1 +/-    2.18      30.4 +/-    2.18  0.100 / 0.130
G06     39.9           54.8                7.8 +/-    0.41       9.3 +/-    0.41  0.040 / 0.040
G12     321.1          56.7                8.3 +/-    1.61       9.7 +/-    1.61  0.030 / 0.050
G17     76.6           17.2                8.6 +/-    1.47      20.4 +/-    1.47  0.150 / 0.280
G19     63.7           33.9                7.7 +/-    1.25      12.4 +/-    1.25  0.130 / 0.270
G24     242.1          32.3               11.4 +/-    1.05      19.1 +/-    1.05  0.060 / 0.140
G25     317.5          19.3                9.3 +/-    0.79      20.7 +/-    0.79  0.070 / 0.130