PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-05:27:30
G05     48.0           18.3                1.9 +/-    1.60       4.4 +/-    1.60  0.040 / 0.040
G13     80.8           36.7                7.8 +/-    0.74      11.9 +/-    0.74  0.040 / 0.040
G15     128.4          50.0                7.7 +/-    0.67       9.7 +/-    0.67  0.460 / 0.470
G16     316.7          11.3                2.8 +/-    9.13       7.7 +/-    9.13  0.450 / 0.750
G20     262.7          66.2                7.1 +/-    0.92       7.7 +/-    0.92  0.100 / 0.140
G21     309.8          44.7                5.6 +/-    0.89       7.5 +/-    0.89  0.180 / 0.190
G25     201.9          14.0                4.4 +/-    4.32      11.2 +/-    4.32  0.220 / 0.310
G26     289.9          21.0                5.0 +/-    1.62      10.7 +/-    1.62  0.170 / 0.410
G29     152.4          76.7                5.7 +/-    1.03       5.9 +/-    1.03  0.040 / 0.070