PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-22:27:20
G02     204.8          41.0               15.5 +/-    1.61      22.1 +/-    1.61  0.060 / 0.110
G06     157.0          73.0               14.4 +/-    0.53      14.9 +/-    0.53  0.070 / 0.130
G12     309.2          17.2               11.6 +/-    2.49      27.4 +/-    2.49  0.060 / 0.080
G17     41.3           44.6               11.0 +/-    0.93      14.9 +/-    0.93  0.070 / 0.090
G19     12.5           61.7               11.6 +/-    0.55      13.0 +/-    0.55  0.130 / 0.190
G24     290.1          40.9                8.9 +/-    7.73      12.7 +/-    7.73  0.110 / 0.170
G28     105.5          31.4               12.9 +/-    1.07      21.9 +/-    1.07  0.040 / 0.030