PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-20:27:30
G10     253.0          28.9               11.3 +/-    0.58      20.2 +/-    0.58  0.040 / 0.060
G13     51.0           28.0                8.4 +/-    0.62      15.4 +/-    0.62  0.050 / 0.070
G15     89.7           59.9               10.6 +/-    0.55      12.1 +/-    0.55  0.160 / 0.820
G16     292.3          15.5                9.2 +/-    3.02      22.6 +/-    3.02  0.140 / 0.580
G20     273.7          52.6               10.9 +/-    0.78      13.3 +/-    0.78  0.070 / 0.180
G21     337.6          62.2               10.2 +/-    0.67      11.4 +/-    0.67  0.060 / 0.170
G26     265.0          14.4                9.4 +/-    1.49      23.7 +/-    1.49  0.030 / 0.050
G29     165.5          47.3               11.2 +/-    0.93      14.6 +/-    0.93  0.030 / 0.040