PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-07:12:30
G03     240.7          69.2                4.7 +/-    0.88       5.0 +/-    0.88  0.050 / 0.040
G09     302.3          16.8                4.2 +/-    4.33       9.9 +/-    4.33  0.040 / 0.050
G14     98.0           16.0                3.0 +/-    1.19       7.3 +/-    1.19  0.130 / 0.300
G16     127.7          57.5                5.4 +/-    0.54       6.3 +/-    0.54  0.130 / 0.270
G22     197.6          56.8                4.7 +/-    0.49       5.6 +/-    0.49  0.260 / 0.400
G23     321.8          51.8                4.3 +/-    0.69       5.4 +/-    0.69  0.250 / 0.290
G26     71.1           51.9                4.3 +/-    0.76       5.3 +/-    0.76  0.040 / 0.050
G31     52.2           19.0                2.7 +/-    2.03       6.2 +/-    2.03  0.030 / 0.040