PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-07:13:10
G10     245.1          21.5                5.9 +/-    2.89      12.6 +/-    2.89  0.090 / 0.290
G13     60.7           33.6                4.0 +/-    0.81       6.6 +/-    0.81  0.110 / 0.310
G15     98.7           57.2                5.3 +/-    0.96       6.2 +/-    0.96  0.040 / 0.040
G16     302.3          15.2                1.3 +/-    2.99       3.3 +/-    2.99  0.030 / 0.040
G20     349.4          73.3                4.6 +/-    0.52       4.8 +/-    0.52  0.040 / 0.040
G21     326.4          55.9                3.6 +/-    0.34       4.2 +/-    0.34  0.030 / 0.040
G26     273.4          18.1                5.2 +/-    1.59      12.0 +/-    1.59  0.030 / 0.030
G29     162.6          57.5                6.3 +/-    0.39       7.3 +/-    0.39  0.030 / 0.040