PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-08:42:40
G08     311.7          16.9                4.0 +/-    1.45       9.4 +/-    1.45  0.140 / 0.200
G10     333.5          60.2                3.8 +/-    0.55       4.3 +/-    0.55  0.120 / 0.220
G14     219.0          28.0                8.6 +/-    2.78      15.8 +/-    2.78  0.060 / 0.090
G20     73.4           33.5                4.6 +/-    0.57       7.5 +/-    0.57  0.060 / 0.090
G21     135.3          56.0                7.5 +/-    0.69       8.8 +/-    0.69  0.030 / 0.030
G24     72.8           30.0                5.1 +/-    0.64       9.0 +/-    0.64  0.030 / 0.040
G27     272.8          37.3                7.2 +/-    1.00      11.0 +/-    1.00  0.050 / 0.080
G32     224.4          55.0                7.7 +/-    1.21       9.1 +/-    1.21  0.060 / 0.080