PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-08:58:00
G08     300.4          20.8                6.0 +/-    1.36      12.9 +/-    1.36  0.050 / 0.120
G10     359.2          62.8                5.5 +/-    0.48       6.2 +/-    0.48  0.050 / 0.130
G14     226.8          39.2                7.9 +/-    2.63      11.7 +/-    2.63  0.030 / 0.030
G20     83.5           27.2                5.0 +/-    1.41       9.2 +/-    1.41  0.030 / 0.040
G21     144.6          43.9                8.0 +/-    1.60      10.9 +/-    1.60  0.050 / 0.110
G24     59.4           27.0                3.9 +/-    0.86       7.4 +/-    0.86  0.060 / 0.090
G27     257.6          33.2                6.5 +/-    1.50      10.6 +/-    1.50  0.070 / 0.120
G32     240.7          66.6                9.1 +/-    0.33       9.8 +/-    0.33  0.070 / 0.120