PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-17:58:30
G07     32.8           67.9               11.3 +/-    0.67      12.1 +/-    0.67  0.070 / 0.110
G08     63.1           47.7               11.1 +/-    0.62      14.4 +/-    0.62  0.060 / 0.110
G09     180.9          51.5               13.1 +/-    1.84      16.3 +/-    1.84  0.030 / 0.040
G11     129.2          28.1               14.1 +/-    0.76      25.8 +/-    0.76  0.030 / 0.040
G18     112.7          10.1              -10.9 +/-   16.66     -30.3 +/-   16.66  0.050 / 0.070
G23     160.1          20.0               12.8 +/-    0.93      28.1 +/-    0.93  0.040 / 0.070
G27     41.4           18.9                8.6 +/-    0.85      19.5 +/-    0.85  0.100 / 0.150
G28     255.2          41.2               13.5 +/-    1.54      19.3 +/-    1.54  0.080 / 0.140
G30     321.2          51.8               12.2 +/-    1.43      15.0 +/-    1.43  0.170 / 0.350