PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-18:13:10
G07     41.1           68.0               11.3 +/-    0.82      12.1 +/-    0.82  0.030 / 0.030
G08     59.2           45.8               10.9 +/-    0.77      14.6 +/-    0.77  0.040 / 0.040
G09     180.3          48.0               13.3 +/-    0.99      17.2 +/-    0.99  0.140 / 0.180
G11     126.5          30.1               14.2 +/-    1.57      24.9 +/-    1.57  0.100 / 0.160
G18     110.1          11.7               12.2 +/-    2.03      32.7 +/-    2.03  0.040 / 0.050
G23     160.4          17.1               12.7 +/-    1.24      30.1 +/-    1.24  0.050 / 0.060
G27     40.1           16.5                8.4 +/-    2.38      20.2 +/-    2.38  0.100 / 0.130
G28     258.8          43.4               14.0 +/-    1.62      19.4 +/-    1.62  0.090 / 0.120
G30     324.1          54.1               10.9 +/-    0.63      13.1 +/-    0.63  0.050 / 0.050