PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-19:27:50
G01     88.9           31.6               27.5 +/-    1.06      46.6 +/-    1.06  0.050 / 0.050
G07     126.9          38.5               14.7 +/-    0.61      21.9 +/-    0.61  0.050 / 0.050
G11     66.4           39.3               12.5 +/-    1.27      18.4 +/-    1.27  0.040 / 0.060
G13     293.2          37.0               10.7 +/-    2.85      16.4 +/-    2.85  0.040 / 0.050
G15     314.3          10.7               -3.0 +/-   24.26      -8.2 +/-   24.26  0.020 / 0.030
G17     213.9          54.7               15.9 +/-    0.77      19.0 +/-    0.77  0.030 / 0.020
G18     61.1           22.8               10.8 +/-    1.77      22.3 +/-    1.77  0.050 / 0.100
G19     214.2          28.0               15.3 +/-    1.53      28.0 +/-    1.53  0.070 / 0.110
G28     340.3          61.6               11.8 +/-    0.80      13.2 +/-    0.80  0.110 / 0.160
G30     109.5          73.9               13.9 +/-    0.73      14.4 +/-    0.73  0.120 / 0.190