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                8.5 +/-    1.84      15.6 +/-    1.84  0.190 / 0.680
G13     52.1           29.1                5.4 +/-    1.06       9.7 +/-    1.06  0.120 / 0.580
G15     81.4           56.6                6.8 +/-    1.07       7.9 +/-    1.07  0.070 / 0.130
G16     293.4          15.3                2.8 +/-    2.42       6.9 +/-    2.42  0.070 / 0.140
G20     344.3          71.5                6.1 +/-    0.44       6.4 +/-    0.44  0.050 / 0.050
G21     336.3          61.6                5.6 +/-    0.58       6.3 +/-    0.58  0.040 / 0.060
G26     264.8          14.8                6.2 +/-    1.54      15.4 +/-    1.54  0.040 / 0.040
G29     165.5          47.9                8.0 +/-    0.61      10.4 +/-    0.61  0.030 / 0.070