PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-20:58:00
G05     51.9           10.5                8.0 +/-    2.40      22.1 +/-    2.40  0.040 / 0.060
G10     242.1          20.7               12.2 +/-    1.52      26.4 +/-    1.52  0.040 / 0.070
G13     63.8           33.5                9.7 +/-    0.76      15.9 +/-    0.76  0.140 / 0.590
G15     109.2          56.9               11.5 +/-    0.59      13.5 +/-    0.59  0.140 / 0.560
G16     306.0          14.9                6.9 +/-    2.90      17.1 +/-    2.90  0.180 / 0.320
G20     257.5          43.9                9.8 +/-    1.79      13.4 +/-    1.79  0.130 / 0.350
G21     321.7          52.1               11.6 +/-    1.20      14.3 +/-    1.20  0.060 / 0.130
G26     278.5          18.8                9.8 +/-    1.42      22.2 +/-    1.42  0.060 / 0.150
G29     159.2          62.3               11.6 +/-    0.98      12.9 +/-    0.98  0.030 / 0.050