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                5.9 +/-    0.76       7.2 +/-    0.76  0.150 / 0.480
G14     211.9          11.9               -1.7 +/-   16.64      -4.4 +/-   16.64  0.100 / 0.380
G15     45.6           24.3                2.5 +/-    0.47       4.9 +/-    0.47  0.060 / 0.080
G20     58.8           42.1                4.7 +/-    1.01       6.6 +/-    1.01  0.050 / 0.090
G21     107.2          71.5                6.1 +/-    0.81       6.4 +/-    0.81  0.040 / 0.050
G24     93.6           27.8                6.2 +/-    1.71      11.4 +/-    1.71  0.050 / 0.050
G27     295.7          36.0                6.3 +/-    0.75       9.7 +/-    0.75  0.080 / 0.170
G32     212.1          37.2                6.5 +/-    1.36       9.9 +/-    1.36  0.070 / 0.140