PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-20:58:10
G02     201.7          29.8               15.7 +/-    1.33      27.6 +/-    1.33  0.040 / 0.080
G06     168.2          62.1               15.3 +/-    0.53      17.1 +/-    0.53  0.050 / 0.110
G17     31.1           53.0               11.5 +/-    0.62      14.0 +/-    0.62  0.050 / 0.050
G19     350.6          67.9               11.2 +/-    0.89      12.0 +/-    0.89  0.040 / 0.050
G24     302.2          35.8                9.7 +/-    0.95      15.2 +/-    0.95  0.050 / 0.040
G28     94.5           38.5               12.7 +/-    0.67      19.0 +/-    0.67  0.050 / 0.040