PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-07:28:10
G10     266.2          37.5                6.8 +/-    1.33      10.3 +/-    1.33  0.210 / 0.460
G13     42.4           19.2                2.7 +/-    2.35       6.1 +/-    2.35  0.180 / 0.540
G15     59.3           48.5                4.4 +/-    0.79       5.6 +/-    0.79  0.150 / 0.130
G16     279.4          12.2                5.6 +/-    1.83      14.8 +/-    1.83  0.090 / 0.130
G20     26.3           61.1                4.8 +/-    0.67       5.4 +/-    0.67  0.050 / 0.040
G21     1.8            71.6                4.9 +/-    0.59       5.2 +/-    0.59  0.040 / 0.040
G24     121.0          13.8                5.0 +/-    2.28      12.8 +/-    2.28  0.040 / 0.030
G27     318.6          18.9                4.2 +/-    2.97       9.5 +/-    2.97  0.040 / 0.030
G29     168.0          31.9                4.2 +/-    1.71       7.0 +/-    1.71  0.170 / 0.230