PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-17:27:50
G01     115.0          20.1               11.7 +/-    1.68      25.6 +/-    1.68  0.070 / 0.060
G07     97.2           58.6               12.7 +/-    0.64      14.6 +/-    0.64  0.050 / 0.060
G08     43.5           28.0                9.0 +/-    1.85      16.3 +/-    1.85  0.030 / 0.050
G09     177.1          23.5               11.9 +/-    1.44      24.2 +/-    1.44  0.030 / 0.040
G11     100.1          41.9               11.2 +/-    0.77      15.8 +/-    0.77  0.040 / 0.080
G13     315.3          23.3                9.1 +/-    1.51      18.5 +/-    1.51  0.050 / 0.080
G17     202.1          28.4               11.7 +/-    1.53      21.2 +/-    1.53  0.100 / 0.150
G18     88.1           22.0                9.9 +/-    1.69      20.8 +/-    1.69  0.110 / 0.140
G28     292.2          55.9               11.0 +/-    1.70      13.0 +/-    1.70  0.130 / 0.210
G30     1.8            73.5               12.7 +/-    0.61      13.2 +/-    0.61  0.140 / 0.200