PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-15:42:40
G02     39.2           50.5               10.0 +/-    0.47      12.6 +/-    0.47  0.040 / 0.030
G05     133.7          66.2               13.5 +/-    0.67      14.7 +/-    0.67  0.030 / 0.030
G06     56.8           13.4                8.7 +/-    1.97      22.4 +/-    1.97  0.030 / 0.040
G12     195.5          61.6               12.4 +/-    1.01      13.9 +/-    1.01  0.030 / 0.040
G20     199.5          32.1               12.4 +/-    1.32      20.8 +/-    1.32  0.060 / 0.160
G25     283.9          58.0               11.9 +/-    1.27      13.8 +/-    1.27  0.070 / 0.130
G29     314.6          37.5                8.9 +/-    1.02      13.6 +/-    1.02  0.030 / 0.050