PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-19:27:40
G02     337.1          78.5               12.5 +/-    0.30      12.8 +/-    0.30  0.020 / 0.030
G05     167.0          33.2               15.3 +/-    0.91      25.2 +/-    0.91  0.030 / 0.040
G06     42.6           37.8               10.3 +/-    0.61      15.6 +/-    0.61  0.100 / 0.390
G12     305.2          74.6               12.2 +/-    0.51      12.6 +/-    0.51  0.130 / 0.320
G19     78.8           24.0               12.3 +/-    0.93      24.5 +/-    0.93  0.140 / 0.220
G24     228.0          21.6               13.8 +/-    1.68      29.3 +/-    1.68  0.090 / 0.180
G25     316.1          36.1               11.7 +/-    2.30      18.1 +/-    2.30  0.090 / 0.120
G29     288.9          11.8               12.6 +/-    3.36      33.8 +/-    3.36  0.090 / 0.100