PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-17:12:30
G10     252.7          30.2               11.8 +/-    2.15      20.6 +/-    2.15  0.130 / 0.390
G13     50.9           27.3                5.4 +/-    2.84      10.1 +/-    2.84  0.160 / 0.390
G15     79.3           56.1                9.1 +/-    0.78      10.7 +/-    0.78  0.040 / 0.050
G16     292.6          15.8                9.6 +/-    2.78      23.4 +/-    2.78  0.050 / 0.040
G20     275.4          54.0               11.2 +/-    2.68      13.5 +/-    2.68  0.130 / 0.160
G21     337.0          61.3                9.1 +/-    0.88      10.2 +/-    0.88  0.110 / 0.190
G26     266.0          14.5                9.0 +/-    1.98      22.6 +/-    1.98  0.040 / 0.040
G29     164.5          48.5               11.0 +/-    0.73      14.2 +/-    0.73  0.040 / 0.050