PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-05:13:00
G05     51.5           10.2                4.2 +/-    1.88      11.6 +/-    1.88  0.040 / 0.050
G10     240.6          18.7                6.8 +/-    1.91      15.5 +/-    1.91  0.040 / 0.040
G13     66.5           34.4                6.6 +/-    1.29      10.7 +/-    1.29  0.110 / 0.140
G15     109.8          55.9                8.5 +/-    0.32      10.0 +/-    0.32  0.120 / 0.210
G16     311.5          12.4                4.9 +/-    4.53      13.0 +/-    4.53  0.210 / 0.330
G20     255.1          42.3                9.0 +/-    2.11      12.6 +/-    2.11  0.150 / 0.340
G21     322.1          52.8                6.8 +/-    0.78       8.3 +/-    0.78  0.080 / 0.130
G26     283.4          18.6                5.9 +/-    1.01      13.4 +/-    1.01  0.070 / 0.110
G29     155.8          59.9                8.2 +/-    0.49       9.3 +/-    0.49  0.030 / 0.040