PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-05:27:40
G05     48.0           18.3                1.7 +/-    0.77       3.8 +/-    0.77  0.110 / 0.410
G13     80.8           36.7                5.7 +/-    0.62       8.8 +/-    0.62  0.170 / 0.470
G15     128.4          50.0                6.8 +/-    0.82       8.6 +/-    0.82  0.070 / 0.130
G16     316.7          11.3                3.6 +/-    2.53       9.7 +/-    2.53  0.070 / 0.120
G20     262.7          66.2                4.7 +/-    0.73       5.0 +/-    0.73  0.150 / 0.390
G21     309.8          44.7                4.1 +/-    1.26       5.6 +/-    1.26  0.170 / 0.370
G25     201.9          14.0                4.8 +/-    2.73      12.3 +/-    2.73  0.040 / 0.050
G26     289.9          21.0                5.1 +/-    2.05      10.9 +/-    2.05  0.050 / 0.050
G29     152.4          76.7                6.8 +/-    0.88       7.0 +/-    0.88  0.040 / 0.080