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                4.1 +/-    4.07      11.4 +/-    4.07  0.040 / 0.060
G10     240.6          18.7                8.1 +/-    2.46      18.3 +/-    2.46  0.040 / 0.060
G13     66.5           34.4                5.8 +/-    0.62       9.2 +/-    0.62  0.170 / 0.230
G15     109.8          55.9                7.5 +/-    0.56       8.8 +/-    0.56  0.120 / 0.240
G16     311.5          12.4                4.7 +/-    1.34      12.5 +/-    1.34  0.120 / 0.350
G20     255.1          42.3                8.8 +/-    0.75      12.3 +/-    0.75  0.100 / 0.330
G21     322.1          52.8                7.4 +/-    0.78       9.0 +/-    0.78  0.050 / 0.130
G26     283.4          18.6                6.2 +/-    1.15      14.1 +/-    1.15  0.060 / 0.120
G29     155.8          59.9                7.3 +/-    0.98       8.3 +/-    0.98  0.030 / 0.050