PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/29-19:42:40
G10     253.0          29.0               11.7 +/-    0.81      20.8 +/-    0.81  0.180 / 0.730
G13     50.9           28.0                9.4 +/-    0.73      17.1 +/-    0.73  0.160 / 0.650
G15     88.5           59.6               11.2 +/-    0.82      12.8 +/-    0.82  0.040 / 0.060
G16     292.4          15.4                8.7 +/-    3.47      21.4 +/-    3.47  0.040 / 0.060
G20     273.7          52.6               11.5 +/-    0.93      14.1 +/-    0.93  0.060 / 0.150
G21     338.1          62.4               10.3 +/-    0.55      11.4 +/-    0.55  0.070 / 0.140
G26     265.3          14.4                9.0 +/-    1.38      22.7 +/-    1.38  0.030 / 0.050
G29     165.4          47.1               12.1 +/-    1.03      15.9 +/-    1.03  0.020 / 0.040