PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-17:42:50
G01     115.5          19.7               12.2 +/-    2.02      27.1 +/-    2.02  0.040 / 0.070
G07     96.3           58.9                9.5 +/-    0.61      10.9 +/-    0.61  0.030 / 0.060
G08     43.7           28.4                8.2 +/-    0.43      14.9 +/-    0.43  0.050 / 0.080
G09     177.2          24.1                9.4 +/-    2.22      18.7 +/-    2.22  0.050 / 0.090
G11     100.8          41.7               11.8 +/-    0.37      16.7 +/-    0.37  0.030 / 0.040
G13     315.6          22.9                7.0 +/-    4.01      14.4 +/-    4.01  0.030 / 0.050
G17     201.9          27.9               10.3 +/-    1.79      18.8 +/-    1.79  0.100 / 0.190
G18     88.7           21.8                9.9 +/-    1.57      20.8 +/-    1.57  0.080 / 0.150
G28     291.3          55.7                9.6 +/-    0.74      11.4 +/-    0.74  0.070 / 0.280
G30     359.6          73.0                9.2 +/-    1.21       9.6 +/-    1.21  0.070 / 0.240