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                9.2 +/-    0.49       9.6 +/-    0.49  0.020 / 0.030
G05     164.8          38.7               12.2 +/-    0.68      18.2 +/-    0.68  0.030 / 0.030
G06     43.9           34.3                7.6 +/-    0.32      12.2 +/-    0.32  0.140 / 0.360
G12     289.3          77.5                9.0 +/-    0.90       9.2 +/-    0.90  0.170 / 0.360
G19     83.5           20.9                9.3 +/-    1.71      20.1 +/-    1.71  0.080 / 0.100
G24     224.0          17.7               11.9 +/-    1.63      27.7 +/-    1.63  0.070 / 0.100
G25     314.5          39.0                9.9 +/-    2.69      14.7 +/-    2.69  0.040 / 0.080
G29     293.8          16.9                8.6 +/-    2.60      20.5 +/-    2.60  0.050 / 0.070