PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-18:27:40
G01     88.0           31.8                8.3 +/-    1.04      14.0 +/-    1.04  0.070 / 0.040
G07     127.4          38.1                9.5 +/-    0.71      14.2 +/-    0.71  0.050 / 0.050
G11     65.8           39.1                7.5 +/-    1.33      11.0 +/-    1.33  0.040 / 0.070
G13     292.4          37.3                8.4 +/-    2.86      12.8 +/-    2.86  0.050 / 0.080
G15     313.8          11.0               -0.8 +/-   21.12      -2.1 +/-   21.12  0.060 / 0.080
G17     214.5          54.8               12.1 +/-    1.02      14.5 +/-    1.02  0.060 / 0.080
G18     60.7           22.8                7.3 +/-    1.72      15.1 +/-    1.72  0.070 / 0.120
G19     214.5          28.8               13.0 +/-    1.46      23.4 +/-    1.46  0.060 / 0.120
G28     341.0          61.6                8.2 +/-    0.96       9.2 +/-    0.96  0.090 / 0.180
G30     112.1          72.8                8.9 +/-    0.90       9.3 +/-    0.90  0.080 / 0.190