PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-09:28:10
G01     86.1           31.6                6.8 +/-    0.94      11.4 +/-    0.94  0.030 / 0.040
G07     127.2          42.1                7.1 +/-    1.52      10.0 +/-    1.52  0.030 / 0.030
G11     67.2           40.9                5.3 +/-    0.83       7.6 +/-    0.83  0.040 / 0.060
G13     291.3          37.8                5.3 +/-    1.50       8.0 +/-    1.50  0.040 / 0.050
G15     314.3          10.5               -8.0 +/-   15.54     -22.0 +/-   15.54  0.040 / 0.060
G17     215.0          53.3                7.5 +/-    0.69       9.1 +/-    0.69  0.050 / 0.060
G18     61.0           23.3                4.0 +/-    0.86       8.2 +/-    0.86  0.110 / 0.130
G19     214.4          30.8                4.1 +/-    1.87       7.1 +/-    1.87  0.090 / 0.100
G28     336.9          61.3                4.0 +/-    1.17       4.4 +/-    1.17  0.080 / 0.130
G30     108.1          76.6                6.4 +/-    0.78       6.5 +/-    0.78  0.050 / 0.100