PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-20:42:50
G01     90.6           31.3               12.6 +/-    1.35      21.5 +/-    1.35  0.050 / 0.070
G07     125.7          40.4               13.0 +/-    1.13      18.9 +/-    1.13  0.040 / 0.080
G11     67.7           39.7               11.4 +/-    1.48      16.7 +/-    1.48  0.070 / 0.100
G13     294.8          36.6               10.1 +/-    4.17      15.6 +/-    4.17  0.070 / 0.140
G17     212.9          54.0               14.0 +/-    0.74      16.9 +/-    0.74  0.070 / 0.060
G18     62.0           22.8               10.4 +/-    1.59      21.5 +/-    1.59  0.050 / 0.050
G19     213.7          26.5               11.7 +/-    1.28      22.2 +/-    1.28  0.100 / 0.190
G28     338.5          61.6               10.0 +/-    0.72      11.2 +/-    0.72  0.090 / 0.140
G30     104.3          75.5               11.9 +/-    0.69      12.2 +/-    0.69  0.030 / 0.030