PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-08:27:40
G10     302.6          53.3                4.7 +/-    0.92       5.7 +/-    0.92  0.050 / 0.070
G14     211.9          11.9               -0.9 +/-   15.70      -2.4 +/-   15.70  0.040 / 0.070
G15     45.6           24.3                3.5 +/-    2.47       6.9 +/-    2.47  0.130 / 0.470
G20     58.8           42.1                4.0 +/-    1.45       5.7 +/-    1.45  0.220 / 0.740
G21     107.2          71.5                6.4 +/-    0.41       6.7 +/-    0.41  0.040 / 0.040
G24     93.6           27.8                5.1 +/-    1.67       9.4 +/-    1.67  0.040 / 0.040
G27     295.7          36.0                5.6 +/-    2.27       8.7 +/-    2.27  0.060 / 0.070
G32     212.1          37.2                6.3 +/-    1.59       9.5 +/-    1.59  0.070 / 0.080