PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-15:42:40
G02     216.3          59.1               14.0 +/-    0.94      16.0 +/-    0.94  0.070 / 0.070
G06     58.0           74.9               14.0 +/-    0.62      14.4 +/-    0.62  0.050 / 0.060
G12     318.9          36.5               12.7 +/-    1.67      19.6 +/-    1.67  0.060 / 0.080
G17     59.7           29.7               13.2 +/-    2.20      23.2 +/-    2.20  0.050 / 0.060
G19     42.5           47.2               12.8 +/-    0.54      16.7 +/-    0.54  0.060 / 0.120
G24     267.1          41.3               13.5 +/-    1.08      19.2 +/-    1.08  0.050 / 0.070
G28     123.5          12.6               12.6 +/-    1.83      33.2 +/-    1.83  0.040 / 0.030