PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/25-13:42:40
G02     202.3          23.7                7.5 +/-    1.57      15.2 +/-    1.57  0.070 / 0.120
G06     165.3          61.1                8.7 +/-    0.37       9.8 +/-    0.37  0.060 / 0.110
G17     24.3           57.7                6.5 +/-    1.09       7.5 +/-    1.09  0.040 / 0.050
G19     346.6          69.0                6.1 +/-    0.86       6.5 +/-    0.86  0.040 / 0.040
G24     305.8          32.7                4.4 +/-    1.33       7.2 +/-    1.33  0.040 / 0.040
G28     90.1           41.8                6.7 +/-    1.20       9.5 +/-    1.20  0.030 / 0.040