PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-20:57:40
G07     325.6          55.8               12.7 +/-    0.78      15.0 +/-    0.78  0.030 / 0.040
G08     110.5          48.0               14.3 +/-    0.63      18.6 +/-    0.63  0.030 / 0.030
G09     224.8          82.2               12.1 +/-    0.49      12.2 +/-    0.49  0.050 / 0.050
G16     43.8           18.2                9.1 +/-    2.97      20.8 +/-    2.97  0.070 / 0.040
G23     152.4          53.4               13.5 +/-    0.88      16.4 +/-    0.88  0.120 / 0.180
G27     67.7           36.9               12.4 +/-    0.86      19.0 +/-    0.86  0.200 / 0.470
G28     229.9          18.8               14.0 +/-    3.36      31.6 +/-    3.36  0.030 / 0.030
G30     294.5          28.9               11.7 +/-    1.13      20.9 +/-    1.13  0.030 / 0.020