PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-06:13:10
G10     244.2          20.7                6.5 +/-    0.92      14.0 +/-    0.92  0.120 / 0.540
G13     62.0           34.0                3.8 +/-    0.41       6.1 +/-    0.41  0.110 / 0.630
G15     101.7          57.1                5.0 +/-    0.97       5.8 +/-    0.97  0.040 / 0.050
G16     303.2          15.2                0.5 +/-    3.01       1.1 +/-    3.01  0.040 / 0.040
G20     313.6          73.5                4.6 +/-    0.82       4.7 +/-    0.82  0.090 / 0.160
G21     324.7          54.8                3.7 +/-    0.53       4.4 +/-    0.53  0.070 / 0.130
G26     274.4          18.5                3.6 +/-    1.12       8.3 +/-    1.12  0.030 / 0.050
G29     162.4          59.2                5.5 +/-    0.86       6.2 +/-    0.86  0.040 / 0.050