PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-06:28:00
G10     252.3          27.8                6.1 +/-    1.56      11.3 +/-    1.56  0.030 / 0.040
G13     52.1           29.1                6.0 +/-    2.19      10.8 +/-    2.19  0.030 / 0.050
G15     81.4           56.6                7.4 +/-    0.80       8.6 +/-    0.80  0.120 / 0.330
G16     293.4          15.3                3.5 +/-    1.36       8.7 +/-    1.36  0.090 / 0.320
G20     344.3          71.5                5.5 +/-    0.55       5.8 +/-    0.55  0.040 / 0.040
G21     336.3          61.6                5.0 +/-    0.94       5.6 +/-    0.94  0.030 / 0.030
G26     264.8          14.8                6.0 +/-    0.67      14.9 +/-    0.67  0.040 / 0.050
G29     165.5          47.9                7.8 +/-    0.60      10.2 +/-    0.60  0.040 / 0.050