PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-08:42:50
G01     225.2          17.2                5.8 +/-    2.16      13.6 +/-    2.16  0.110 / 0.330
G03     285.3          69.2                5.3 +/-    0.89       5.6 +/-    0.89  0.130 / 0.270
G14     85.9           24.5                5.9 +/-    1.02      11.6 +/-    1.02  0.030 / 0.040
G16     147.2          44.0                8.9 +/-    0.98      12.2 +/-    0.98  0.030 / 0.040
G22     215.3          70.3                5.8 +/-    0.66       6.1 +/-    0.66  0.030 / 0.050
G23     309.2          40.2                3.7 +/-    0.94       5.4 +/-    0.94  0.030 / 0.050
G26     98.7           54.2                7.5 +/-    0.69       9.0 +/-    0.69  0.080 / 0.160
G31     45.7           31.2                3.1 +/-    0.55       5.4 +/-    0.55  0.080 / 0.210