PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-00:57:50
G10     248.2          24.7               14.2 +/-    1.19      28.0 +/-    1.19  0.030 / 0.040
G13     56.2           31.4               10.9 +/-    1.13      18.6 +/-    1.13  0.030 / 0.040
G15     96.0           58.7               12.6 +/-    0.99      14.5 +/-    0.99  0.080 / 0.150
G16     297.2          16.0                9.8 +/-    1.51      23.8 +/-    1.51  0.050 / 0.120
G20     259.4          37.8               14.4 +/-    3.82      21.8 +/-    3.82  0.130 / 0.350
G21     329.2          57.6               11.6 +/-    0.43      13.5 +/-    0.43  0.100 / 0.330
G26     269.0          16.8               12.7 +/-    1.24      30.2 +/-    1.24  0.020 / 0.030
G29     164.5          54.3               11.6 +/-    0.76      13.9 +/-    0.76  0.030 / 0.040