PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/04-13:43:10
G02     208.3          43.3                7.2 +/-    1.40      10.0 +/-    1.40  0.070 / 0.070
G06     120.2          78.3                6.1 +/-    0.46       6.2 +/-    0.46  0.070 / 0.070
G12     312.6          24.3                4.1 +/-    1.71       8.2 +/-    1.71  0.030 / 0.040
G17     43.5           43.5                5.1 +/-    1.89       7.1 +/-    1.89  0.040 / 0.050
G19     23.7           57.0                5.3 +/-    0.95       6.1 +/-    0.95  0.030 / 0.030
G24     285.2          41.0               -1.9 +/-    1.62      -2.7 +/-    1.62  0.040 / 0.030
G28     109.5          29.8                6.8 +/-    1.26      12.0 +/-    1.26  0.080 / 0.140