PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-14:42:20
G02     224.8          68.0               10.0 +/-    0.92      10.7 +/-    0.92  0.050 / 0.070
G06     45.1           68.1                9.2 +/-    0.85       9.8 +/-    0.85  0.040 / 0.050
G12     320.7          43.6                8.4 +/-    1.58      11.5 +/-    1.58  0.070 / 0.080
G17     66.2           24.9                8.2 +/-    1.11      16.1 +/-    1.11  0.070 / 0.100
G19     51.0           42.0                7.5 +/-    0.56      10.6 +/-    0.56  0.030 / 0.030
G24     256.5          38.9               11.0 +/-    0.80      16.3 +/-    0.80  0.020 / 0.030