PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-09:27:40
G07     23.4           68.4                5.2 +/-    0.64       5.5 +/-    0.64  0.030 / 0.040
G08     67.8           51.2                5.3 +/-    1.32       6.5 +/-    1.32  0.030 / 0.030
G09     179.4          50.0                7.7 +/-    0.53       9.8 +/-    0.53  0.130 / 0.340
G11     131.1          28.3                5.9 +/-    1.00      10.7 +/-    1.00  0.270 / 0.160
G18     113.8          10.2               -3.2 +/-   21.31      -8.9 +/-   21.31  0.040 / 0.050
G23     159.1          17.4                4.0 +/-    1.34       9.5 +/-    1.34  0.040 / 0.060
G27     40.7           17.7                3.6 +/-    2.06       8.5 +/-    2.06  0.230 / 0.360
G28     254.2          39.4                7.3 +/-    1.24      10.7 +/-    1.24  0.190 / 0.300
G30     319.4          50.3                4.5 +/-    0.60       5.7 +/-    0.60  0.050 / 0.050