PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-17:27:50
G07     41.1           67.9               10.5 +/-    0.71      11.3 +/-    0.71  0.050 / 0.050
G08     60.1           46.4               10.7 +/-    0.97      14.2 +/-    0.97  0.040 / 0.040
G09     180.4          48.6               13.9 +/-    0.83      17.9 +/-    0.83  0.030 / 0.040
G11     127.0          29.9               13.6 +/-    1.44      23.9 +/-    1.44  0.030 / 0.040
G18     110.7          11.5               12.5 +/-    2.20      33.8 +/-    2.20  0.140 / 0.120
G23     160.2          17.1               10.4 +/-    1.27      24.5 +/-    1.27  0.110 / 0.100
G27     40.2           16.8                8.3 +/-    2.60      19.7 +/-    2.60  0.150 / 0.280
G28     258.1          42.9               13.8 +/-    1.44      19.1 +/-    1.44  0.180 / 0.340
G30     324.1          54.1               10.1 +/-    0.68      12.1 +/-    0.68  0.130 / 0.270