PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/20-08:42:50
G02     210.4          54.6                7.9 +/-    0.86       9.5 +/-    0.86  0.080 / 0.090
G06     84.6           78.5                6.6 +/-    0.50       6.7 +/-    0.50  0.080 / 0.110
G12     316.3          32.7                4.0 +/-    1.51       6.6 +/-    1.51  0.120 / 0.180
G17     51.1           36.6                5.2 +/-    0.78       8.0 +/-    0.78  0.110 / 0.200
G19     32.8           52.3                6.7 +/-    1.63       8.3 +/-    1.63  0.050 / 0.060
G24     276.8          41.6                7.2 +/-    1.07      10.2 +/-    1.07  0.040 / 0.060
G28     114.5          26.6                7.8 +/-    1.41      14.8 +/-    1.41  0.040 / 0.040