PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-18:58:00
G01     100.4          28.1               11.0 +/-    0.98      20.0 +/-    0.98  0.050 / 0.050
G07     117.5          47.0               11.9 +/-    0.96      15.6 +/-    0.96  0.040 / 0.050
G08     41.5           14.9                7.3 +/-    2.19      18.2 +/-    2.19  0.040 / 0.050
G11     79.0           42.5               10.3 +/-    1.25      14.4 +/-    1.25  0.040 / 0.050
G13     304.0          32.9                8.4 +/-    2.23      13.9 +/-    2.23  0.040 / 0.030
G17     207.6          44.2               12.4 +/-    0.35      16.9 +/-    0.35  0.040 / 0.030
G18     71.7           24.1                9.2 +/-    1.61      18.4 +/-    1.61  0.060 / 0.130
G19     210.2          18.7               -0.9 +/-   11.91      -2.1 +/-   11.91  0.060 / 0.140
G28     320.2          60.5                9.3 +/-    0.87      10.6 +/-    0.87  0.100 / 0.170
G30     66.6           79.1               10.8 +/-    0.74      11.0 +/-    0.74  0.120 / 0.130