PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-22:42:50
G02     205.0          41.9               13.8 +/-    0.74      19.4 +/-    0.74  0.210 / 0.170
G06     143.9          75.4               11.7 +/-    0.87      12.1 +/-    0.87  0.230 / 0.260
G12     310.9          20.4                9.0 +/-    1.80      19.6 +/-    1.80  0.050 / 0.070
G17     38.5           47.8               10.9 +/-    1.85      14.2 +/-    1.85  0.050 / 0.070
G19     10.8           62.1               11.1 +/-    0.76      12.4 +/-    0.76  0.030 / 0.040
G24     290.6          40.7               14.6 +/-    5.13      21.0 +/-    5.13  0.040 / 0.050
G28     108.4          26.8               11.2 +/-    0.85      21.0 +/-    0.85  0.030 / 0.030