PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-19:27:50
G01     61.8           30.9               10.1 +/-    1.06      17.3 +/-    1.06  0.040 / 0.050
G07     140.6          18.2               13.2 +/-    1.78      30.3 +/-    1.78  0.040 / 0.060
G11     48.5           24.8                9.8 +/-    1.59      19.2 +/-    1.59  0.080 / 0.240
G13     264.1          36.7               11.5 +/-    2.40      17.7 +/-    2.40  0.080 / 0.170
G15     295.0          16.5                9.0 +/-    1.35      21.6 +/-    1.35  0.030 / 0.050
G17     250.4          75.3               12.4 +/-    0.28      12.8 +/-    0.28  0.040 / 0.040
G18     42.3           12.9                9.2 +/-    1.23      24.1 +/-    1.23  0.130 / 0.200
G19     229.8          49.3               12.1 +/-    2.48      15.4 +/-    2.48  0.340 / 0.350
G28     23.8           59.4                9.6 +/-    0.94      11.0 +/-    0.94  0.100 / 0.130
G30     141.9          52.1               12.0 +/-    0.81      14.7 +/-    0.81  0.080 / 0.130