PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-13:27:50
G01     234.8          25.6                7.9 +/-    0.95      15.2 +/-    0.95  0.090 / 0.160
G03     304.7          64.0                7.3 +/-    0.78       8.0 +/-    0.78  0.180 / 0.250
G14     75.9           30.8                6.9 +/-    1.28      12.0 +/-    1.28  0.040 / 0.040
G16     158.5          30.5                7.9 +/-    1.18      13.7 +/-    1.18  0.040 / 0.040
G18     208.4          14.4                8.4 +/-    2.68      21.1 +/-    2.68  0.070 / 0.130
G22     236.0          77.0               12.7 +/-    0.31      13.0 +/-    0.31  0.090 / 0.120
G23     298.4          29.3                5.9 +/-    2.96      10.4 +/-    2.96  0.040 / 0.030
G26     122.6          49.2                9.3 +/-    1.29      11.9 +/-    1.29  0.030 / 0.030
G31     41.6           43.9                6.1 +/-    1.17       8.3 +/-    1.17  0.220 / 0.430
G32     87.7           18.0                6.9 +/-    2.33      15.9 +/-    2.33  0.180 / 0.450