PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-23:57:40
G10     250.2          26.5               12.2 +/-    1.13      23.1 +/-    1.13  0.120 / 0.610
G13     53.9           30.0                8.3 +/-    0.88      14.5 +/-    0.88  0.170 / 0.760
G15     91.8           58.9               10.1 +/-    0.63      11.6 +/-    0.63  0.070 / 0.120
G16     294.6          16.0                9.2 +/-    4.22      22.4 +/-    4.22  0.080 / 0.150
G20     258.0          30.9                8.0 +/-    0.77      13.8 +/-    0.77  0.050 / 0.050
G21     331.9          59.2                8.7 +/-    0.94      10.0 +/-    0.94  0.040 / 0.050
G26     266.6          15.9               12.6 +/-    3.18      30.8 +/-    3.18  0.030 / 0.060
G29     165.1          51.6                9.7 +/-    0.46      12.0 +/-    0.46  0.030 / 0.060